Typification of names of plants described by Carlos Pau from Morocco (1908-1922)

Neus Nualart1, Neus Ibáñez1, Alfonso Susanna1 & Ignasi Soriano2

1 Botanic Institute of Barcelona (IBB, CSIC-ICUB), Passeig del Migdia s/n, 08038
Barcelona, Spain
2 Dept. Biologia Evolutiva, Ecologia i Ciències Ambientals, S. Botànica i Micologia,
University of Barcelona, Diagonal 643, 08028 Barcelona, Spain
Author for correspondence: Neus Nualart, nnualart@ibb.csic.es

Abstract The vascular plant names proposed by Carlos Pau from Morocco between
1908 and 1922 were studied and, when necessary and possible, typified. Ten lectotypes
have been designated; most of them preserved in MA and BC herbaria (isolectotypes at
BCN, G, LD, and P).
Keywords Carlos Pau; Morocco flora; N-Africa; nomenclature.

INTRODUCTION
Carlos Pau (1857-1937) was one of the first Spanish botanists to study the flora of
Northern Morocco (see González-Bueno & Gomis, 2005). His research began in 1908,
when he examined some plants that he had received from other naturalists such as
Benito Vicioso. During the next 28 years, and until his death, he proposed about 400
new taxa from this area, including species, subspecies, varieties and forms (90% validly
published). Although Carrasco (1975) published an exhaustive list of taxa described by
Pau, it is not complete and, moreover, most of Pau’s names are still untypified.
As part of a general study of all the Moroccan taxa proposed by Pau, we present a
revision of the nomenclatural novelties (46 new Moroccan taxa) proposed during the
period 1908-1922, mainly based on plants provided by Benito Vicioso, Francisco Pérez
Camarero, Antonio Xiberta, Arturo Caballero, Angel Aterido and Manuel Vidal (Pau,

1908, 1911, 1918, 1921, 1922; Font Quer, 1914, 1916; Caballero, 1917; Vidal, 1921,
1922). The aim of this paper is the typification of these names in order to stabilize their
interpretation and to evaluate their synonymy.

MATERIAL AND METHODS
This work is based on the analysis of relevant literature (including protologues),
and examination of herbarium specimens. The main source of original material for the
names proposed by Pau is the herbarium of the Royal Botanic Gardens of Madrid (MA),
where his collection (about 100,000 specimens) was deposited a few years after his
death (see Mateo, 1995). Other original material can be found at the herbarium of the
Botanical Institute of Barcelona (BC) owing to the relationship between Pau and Pius
Font Quer (curator of the herbarium at that time) and with Fr. Sennen (see Mateo,
1995). Duplicates of Pau’s collection were found at BCN, G, LD, MPU, and P (herbaria
acronyms according to Thiers, 2017). Wherever possible, we have chosen to typify
material of the Pau collection deposited in MA; whenever there was more than one
specimen, we chose the most complete and well preserved, in accordance with the
description given in the protologue. To evaluate the synonymy of these names, we have
compared the original material with the type specimens of the accepted names, revised
the original description of these accepted names and checked recent North African
floras. Names typified here are listed chronologically. In some cases (Art. 9.19 of ICN;
McNeill & al., 2012), we have proposed that some previously designated types be
superseded because they are based on specimens from the exsiccata “ITER
MAROCCANUM” (1927–1932) that were collected after the names had been
published.

TYPIFICATIONS
Based on our examination of literature, only eight out of the 46 names given by
Pau in the period 1908–1922 have been correctly typified (see Prado & al., 2015):
Campanula vincaeflora Pau in Vidal (1921: 278) by Cano-Maqueda & Talavera (2011:
36), Chrysanthemum holophyllum Pau in Vidal (1922: 59) by Vogt (1996: 302),
Convolvulus vidalii Pau in Vidal (1921: 279) by Sa’ad (1967: 239), Daucus minusculus
Pau in Font Quer (1914: 428) by Sáenz de Rivas (1974: 194), Eryngium triquetrum var.
xauensis Pau in Vidal (1921: 277) by Breton (1962: 56), Hypericum tomentosum var.
viridulum Pau in Vidal (1922: 57) by Robson (1996: 182), Scabiosa ateridoi Pau (1918)
by Devesa (1984: 175), and Thymus ciliatus var. fumanifolius Pau in Font Quer (1916:
286) by Morales (1994: 217).
In 24 taxa we have found only a single specimen and therefore it should be
considered as the holotype (see McNeill, 2014): Acanthus mollis var. viciosoi Pau
(1908: 71, MA barcode MA115539!), Andryala gracilis Pau (1918: 130, BC barcode
BC-36093!), Avena hirsuta var. sallentiana Pau (1918: 133, BC barcode BC-68088!),
Biscutella apula f. reticulata Pau in Vidal (1922: 56, MA barcode MA44491!), Bryonia
dioica var. lavifrons Pau in Vidal (1921: 277, MA barcode MA120808!), Centaurea
pungens f. alobyphylla Pau (1921: 201, MA No. 136040 [photo!])), Centaurium minus
var. bifrons Pau in Vidal (1922: 60, MA barcode MA92759!), Convolvulus suffruticosus
var. melillensis, as melillense Pau (1911: 99, MA No. 94101!), Dianthus siculus var.
lanceolatus Pau (1927: 22, MA No. 33506!), Echium rifeum Pau (1917: 27, MA No.
97395!), Fumaria muralis var. curta Pau (1908: 69, MA No. 43421!), Hedysarum
zeluanum Pau (1911: 99, MA No. 68840!), Helianthemum apenninum var. riffeum Pau
(1911: 97,: MA No. 80650!), Lavatera vidalii Pau in Vidal (1922: 58, MA barcode
MA77180!), Linaria riffea Pau (1911: 99, MA No. 110310!), Linaria spuria f.

minoripes Pau (1921: 202, MA No. 109083 [photo!]), Linum moroderorum Pau (1911:
98, MA barcode MA72779!), Onobrychis ligulifera Pau (1911: 99, MA No. 68933
[photo!]), Ononis tetuanensis Pau in Vidal (1921: 276, MA No. 61602!), Phlomis
caballeroi Pau (1918: 132, MA barcode MA242065!), Ranunculus repentifolius Pau in
Vidal (1922: 56, MA barcode MA40942!), Verbena supina f. erecta Pau (1911: 98, MA
No. 97523!), Veronica beccabunga var. xauenensis Pau in Vidal (1922: 60, MA barcode
MA112408!), Vicia disperma var. subuniflora Pau in Caballero (1917: 18, MA No.
69961!).
Among the remaining names, nine are lectotypified here, and four remain without
designated types pending further research [Centranthus calcitrapa f. puberula Pau in
Vidal (1921: 277), Epilobium caballeroi Pau in Vidal (1922: 59, pro hybr.), Linaria
supina var. ajmasiana Pau in Vidal (1922: 59) and Linum tenue var. xauense Pau in
Vidal (1921: 275); for which neither original material (for lectotypification purposes)
nor other useful material (for neotypification purposes) has been found]. Finally, one is
considered nomen nudum: Glaucium corniculatum f. foeniceum Pau in Vidal (1921:
275) due to its not having any description or diagnosis in the original publication, and
not having found any other information in any subsequent publication (Art. 38.1(a) of
ICN; McNeill & al., 2012).

Pau (1911): Una visita botánica al Riff (Abril, Mayo 1910): This is a paper about
Pau’s first trip to Morocco in 1910, when he visited Melilla, Selouane, Puntilla and
Corazón del Toro (Bugenzen). Eight new taxa for the Moroccan flora were described
and one is typified here.
Convolvulus suffruticosus var. melliflorus
Pau (1911) described this variety of Convolvulus suffruticosus Desf. characterised
by its hairy stems, ovate-oblong leaves, long peduncles, densely sericeous sepals and
yellowish corolla. In the protologue Pau indicated that this plant was a morphological

intermediate between C. supinus Coss. & Kralik (with similar flowers) and C.
suffruticosus (with similar leaves). Also the exact locality is mentioned (“Zeluan”).
Carine & Robba (2010) reported a “holotype” for this taxon cited as “Convolvulus
valentinus var. melliflorus Pau”, but there are two sheets at MA collected by Pau in
Selouane that are syntypes (Art. 9.5), while Carine & Robba (2010) did not mention any
particular sheet. MA No. 94100 has two original handwritten labels by Pau, one with the
information about the gathering and another reporting the diagnosis. MA No. 94102 is
labelled as “B. et C. Vicioso Herbarium Mauritanicum” but the gathering information is
the same. The specimen here chosen as lectotype is the one labelled by Pau that bears a
better and more complete plant.
Dobignard & Chatelain (2010-2013) included this variety in Convolvulus
valentinus subsp. suffruticosus (Desf.) Maire, and the MA specimens were redetermined as C. valentinus Cav. by Menemen in 1994-95. However, the molecular and
morphological study by Carine & Robba (2010) of this complex supports the treatment
of the variety under C. supinus.
Convolvulus suffruticosus var. melliflorus Pau in Ann. Sci. Acad. Polytecn. Porto 6: 99.
1911 ≡ Convolvulus valentinus var. melliflorus (Pau) Jahand. & Maire, Cat. Pl.
Maroc 3: 588. 1934 ≡ Convolvulus supinus var. melliflorus (Pau) Carine &
Robba in Phytotaxa 14: 16. 2010 – Lectotype (designated here): [MOROCCO]
Zeluan, 2 May 1910, C. Pau s.n. (MA No. 94100!; isolectotype: MA No 94102!).
Font Quer (1914): Plantas de Larache: Font Quer (1914) published a list of plants
collected by F. Pérez Camarero around Larache in 1914, as he stated in the introduction:
“alrededores de Larache por mi distinguido compañero el farmacéutico militar Sr.
Pérez Camarero, durante la primavera pasada”. Font Quer sent some of these plants to
Pau for their determination because at that time he did not have African specimens for
comparison (see González-Bueno & Gomis, 2007). In this paper all plants are
numbered. Five new taxa are described, of which four are here typified.
Malcolmia patula var. longifolia
Number 23 is a new variety of Malcolmia patula Lag. ex DC. with the diagnosis
“Folia siliqui et rostra longiores” made by Pau. Al-Shehbaz & al. (2014) mentioned a
BC specimen as holotype (BC barcode BC-77766), and a MPU specimen as isotype,
both collected in Larache in 1930 and included in the exsiccata “ITER
MAROCCANUM, 1930”; thus they were collected 16 years after the description of the
taxon in 1914. According to Art. 9.19 of ICN (McNeill & al., 2012) this typification has
to be superseded because original material exists: the plants collected by Pérez
Camarero in 1914. There are three sheets of this gathering, one at MA and two at BC,

one conserved in the general collection and the other in the personal collection of
Sennen. The BC specimens are labelled as “HERBARIO DE P. FONT QUER” with an
indication of the taxon name and the protologue handwritten by Font Quer. The MA
specimen has an original label also handwritten by Font Quer with the locality,
collector, date and number, but the taxon name is “Malcolmia patula (Lag.) DC.?”. The
three sheets bear complete plants and we select as the lectotype that preserved at MA
where the main collection of Pau is conserved.
All three specimens have a revision label by Nogueira in 1989 who re-determined
them as Malcolmia lacera (L.) DC. López González (1986) demonstrated that the
designated type of this taxon is a specimen of Raphanus L. and not Malcolmia L.; so,
this is a misapplied name and, according to Al-Shehbaz & al. (2014), all the records of
M. lacera from the Iberian Peninsula and north-western Africa have to be attributed to
M. triloba (L.) Spreng.
Malcolmia patula var. longifolia Pau in Font Quer in Bol. Soc. Esp. Hist. Nat. 14: 427.
1914 ≡ Malcolmia broussonetii var. longifolia (Pau) Maire in Bull. Soc. Hist. Nat.
Afrique N. 20: 12. 1929 – Lectotype (designated here): [MOROCCO] Larache,
1914, F. Pérez Camarero 23 (MA No. 49783!; isolectotypes: BC barcode BC3377!, BC-Sennen barcode BC-802252!).
= Malcolmia triloba (L.) Spreng., Syst. Veg. 2: 899. 1825 ≡ Cheiranthus trilobus L., Sp.
Pl. 662. 1753 – Lectotype (designated by López González in Anales Jard. Bot.
Madrid 42: 319. 1986): Herb. Linn. No. 839.24 (LINN [digital image!]).
Nonea perezii
Number 34 is a new Nonea species. Pau (see Font Quer, 1914) provided a detailed
description and two comparisons: (1) with the genus Elizaldia Willk., similar in its
solitary nutlets (sometimes geminated) and (2) with N. phaneranthera Viv. [= N.
calycina (Roem. & Schult.) Selvi, Bigazzi, Hilger & Papini], a very different species.
There are two sheets preserved at BC and labelled as N. perezii, both bearing the
herbarium collection label of Font Quer. One sheet is conserved in the general collection
and it also includes another label with the indication handwritten by Font Quer “Nonnea
phaneranthera Viv.? No conozco la descripción de esta especie. Sin escamas en el
tubo”. The other is conserved in the Sennen collection (BC). In both of these sheets, the
gathering information reported, as well as the plant, match the protologue. The
specimen chosen as lectotype is the more complete plant.
The current concept of Nonea L. differs among authors. In Morocco, Valdés
(2002), Fennane (2007) and El Oualidi & al. (2012) accept the genus Elizaldia Willk. as
different from Nonea, according to the inclusion/exclusion of the stamens. However,
molecular studies (Selvi & al., 2006) support the inclusion of Elizaldia within Nonea.

On the other hand, all these authors recognize two species on the basis of the stamens
length: N. calycina and N. heterostemon Murb. (a Moroccan endemism). Contrarily,
Valdés (2011) and Valdés & Talavera (2012) only accept N. calycina due to its
heterostyly. Pau (1914) did not mention the stamens length in his description of N.
perezii, but examining the type specimens, we have observed that one stamen is much
longer than the others. Murbeck (1898) had just included this charater in the description
of N. heterostemon and, thereafter, Pau’s species should be synonymized with Nonea
heterostemon.
Nonea perezii Pau in Font Quer in Bol. Soc. Esp. Hist. Nat. 14: 428. 1914, as Nonnea –
Lectotype (designated here): [MOROCCO] Larache (Afr. bor), 1914, F. Pérez
Camarero 34 (BC barcode BC-42193!, isolectotype: BC-Sennen barcode BC990170!).
= Nonea heterostemon Murb. in Acta Univ. Lund. 34: 7. 1898 – Type: not designated.
Ononis maweana var. fontqueri
Number 15 is a new variety of Ononis maweana Ball that, according to Pau (see
Font Quer, 2014), would differ from the nominal variety by the leaves and calyx. We
have found two sheets collected by F. Pérez Camarero in Larache in 1914. The BC
specimen is labelled as “HERBARIO DE P. FONT QUER” with an indication of the
variety handwritten by Pau. The MA specimen contains only one identification at
species level but is numbered 15 as reported in the protologue. As a consequence, we
have chosen this second sheet as the lectotype. On the basis of the examination of these
sheets and following Dobignard & Chatelain (2010–2013), this variety should be
included in Ononis maweana Ball.
Ononis maweana var. fontqueri Pau in Font Quer in Bol. Soc. Esp. Hist. Nat. 14: 427.
1914 – Lectotype (designated here): [MOROCCO] Larache, 1914, F. Pérez
Camarero 15 (MA No. 61795!; isolectotype: BC barcode BC-14553!).
= Ononis maweana Ball in J. Bot. 11: 304. 1873 – Syntypes: [MOROCCO] prope
Tanger, 18 April 1871, G. Maw s.n. (G barcode G00022418 [digital image!]; K
barcode K000226846 [digital image!]).
Triglochin barrelieri var. maura
Number 5 is a new variety of Triglochin barrelieri Loisel. Although the name is
cited as “var. nov. maurum Pau in litt.”, the description of this taxon was made by Font
Quer, who indicated that it differs from the nominal variety by its longer and almost
straight pedicels and larger fruits (“Difieren del tipo por los pedúnculos mayores y casi

rectos, con frutos doble mayores”). Since the description was made by Font Quer, the
authorship of this variety should be “Pau ex Font Quer”.
Köcke & al. (2010: 363) lectotypified this taxon on the basis of a specimen
collected by Font Quer in “Rincón de Medik” from the exsiccata “ITER
MAROCCANUM, 1930” conserved in Maire’s collection (MPU barcode 006791).
However, we have found original material with the same collector (“Pérez Camarero”),
date (“Primavera de 1914”) and locality (“Larache”) indicated in Font Quer’s
publication in MA and BC herbaria (although they are labelled only as “Triglochin
barrelieri”). Being that the specimen proposed by Köcke & al. (2010) was collected 16
years after the taxon was published and original material exists, this lectotypification is
not correct. It should be added that the BC specimen has another label handwritten by
Pau, indicating “var. nova maura” and a diagnosis: “Frutos mayores, pedúnculos
patentes no arqueados y más largos”. However, we selected the MA specimen as
lectotype because it includes a better preserved and complete plant.
The BC specimen also has a revision label by von Mering who re-determined it as
Triglochin barrelieri Loisel. According to Köcke & al. (2010), this species is very
variable in overall size and fruit and pedicel length, and includes also plants with long
pedicels and big fruits, the distinctive characters of T. barrelieri var. maura.
Triglochin barrelieri var. maura Pau ex Font Quer in Bol. Soc. Esp. Hist. Nat. 14: 425.
1914, as maurum ≡ Triglochin bulbosa var. maura (Pau ex Font Quer) Maire in
Jahandiez & Maire, Cat. Pl. Maroc 4: 922. 1941 – Lectotype (designated here):
[MOROCCO] Larache, 1914, F. Pérez Camarero 5 (MA barcode MA3496!,
isolectotype: BC barcode BC-59660!).
= Triglochin barrelieri Loisel., Fl. Gall. ed. 1: 725. 1807 – Holotype: [FRANCE]
Arelatem [Arles] ad Rhodanii, s.d., J.M. Artaud s.n. (AV [digital image!]).

Caballero (1917): Excursión botánica a Melilla en 1915: Caballero (1917) published
a list of plants collected by himself on a trip to Melilla in 1915, as he explains in the
introduction of this paper: “El día 24 de Mayo de 1915 desembarcamos en el puerto de
Melilla con el fin de realizar algunas exploraciones botánicas”. On the sixth page he
acknowledged Pau for his help in solving taxonomical problems (“nuestro sincero
agradecimiento al sabio botánico español D. Carlos Pau, que ... ha resuelto todas las
dudas que nos hemos permitido comunicarle.”). This help resulted in the proposal of
four new taxa, one typified here.
Genista caballeroi

According to Pau (Caballero, 2017: 19), Genista caballeroi is similar to G.
tricuspidata Desf. but without stipulary appendices. The locality indicated in the
protologue is “Habitat copiosissima infra Hardú in latere septentrionale Montis
Gurugú. Fl. Junio”. There are two sheets in MA herbarium collected in Gurugú in June
1915 by Caballero. One (MA No. 58809) bears two original labels handwritten by Pau
with the gathering information and the taxon name, whereas the other (MA No. 58812)
is labelled “B. et C. Vicioso Herbarium Mauritanicum” and lacks information on the
day of collecting. Both specimens bear complete plants and we have chosen as the
lectotype the one labelled by Pau.
Genista caballeroi has been accepted by Talavera (2002) as an endemic taxon
from N-Morocco and NW-Algeria, based on the absence of stipulary appendices to
most of the leaves, the number of ribs on the stems and the size of the hairs on both
stem and legume. However, neither Fennane (2007) nor Dobignard & Chatelain (20102013) accept it as a good species, and they synonymize it with G. tricuspidata, a species
considered very variable from the morphological point of view. Desfontaines (1798), in
the description of G. tricuspidata, did not mention the presence or absence of stipulary
appendices, the character that Pau used to describe G. caballeroi. Neither the number of
ribs non the hairs’ size—characters used by Talavera (2002)—are included in this
description. Therefore, although we have not seen the original material of G.
tricuspidata, according to our criteria, G. caballeroi cannot be considered a different
taxon.
Genista caballeroi Pau in Caball. in Trab. Mus. Nac. Ci. Nat., ser. bot. 11: 19. 1917 ≡
Genista tricuspidata subsp. caballeroi (Pau) Maire in Bull. Soc. Hist. Nat. Afrique
N. 22: 38. 1931 ≡ Genista tricuspidata var. caballeroi (Pau) Raynaud in Naturalia
Monspel., sér. bot. 28: 28. 1979 – Lectotype (designated here): [MOROCCO]
Gurugú, 12 June 1915, A. Caballero s.n. (MA No. 58809!; isolectotype: MA No.
58812!).
= Genista tricuspidata Desf., Fl. Atlant. 2: 138. 1798 – Type: not designated.
Pau (1918): Plantas de Melilla: This paper includes a list of plants with seven new
taxa (five from Melilla and two from the Iberian Peninsula), of which one is here
typified. The main collector (Angel Aterido) and the collection details are indicated in
the introduction, where the locality and date are annotated “Tifasor; y fueron recogidas
desde el día 10 al 30 de Julio del año 1915”. It should be noted that Pau reviewed
almost all the specimens mentioned in the paper when he was in Barcelona as he stated
in the introduction “D. Ángel Aterido … recogió algunas plantas que he podido revisar
durante mi corta estancia en la capital del Principado Catalán este año pasado”.

Bupleurum melillense
Pau (1918) provided a description for this new species specifying that it differs
from B. balansae Boiss. & Reut. by its shorter leaves, more distant veins, shortly
pedunculated umbels, shorter and wider involucral bracts, widened fruits and sharper
ridges. Four herbarium sheets are indicated as possible types on the website of the MPU
herbarium
(https://collections.umontpellier.fr/herbier-mpu-presentation/base-dedonnees-botanique-herbier-mpu); however, none of them constitutes original material of
this taxon, and therefore they are not eligible as lectotypes according to Arts. 9.1 and 9.2
of ICN (McNeill & al., 2012). In fact, these plants were collected by Sennen in 1930
and 1931, some time later than the publication of the species in 1918. Moreover, they
came from a different locality (Tizi-Assa) than that mentioned in the protologue
(Tifasor). The appropriate original material is that from Tifasor collected by Aterido in
July 1915, as indicated in the protologue. There are two sheets of this gathering in MA
and BC herbaria. We select the one in MA as the lectotype because it has a note
handwritten by Pau indicating “mi tipo” and the plant is more complete that the one in
BC.
Although Pau considered the distinguishing characters of Bupleurum melillense as
being enough to propose a new species, on the basis of the examination of the two types
and attending to the revision label by Neves in 1998 in the BC specimen, this taxon
should be synonimized to B. balansae, characterized by its slender rays and linear
leaves (Fennane, 2007). We have designed the lectotype of B. balansae according to the
PhD thesis of Neves (2000: 261).
Bupleurum melillense Pau in Bol. Soc. Aragonesa Ci. Nat. 17: 129. 1918 – Lectotype
(designated here): [MOROCCO] Tifasor (Melilla), 15 July 1915, A. Aterido s.n.
(MA barcode MA86591!; isolectotype: BC barcode BC-26034!).
= Bupleurum balansae Boiss. & Reut. in Diagn. Pl. Orient. Ser. 2, 3(2): 83. 1856 –
Lectotype (designated here): [ALGERIE] coteaux avoisinant la Batterie
Espagnole, 30 June 1852, B. Balansa 482 (G barcode G00023190 [digital
image!]).
Pau (1922): Nueva contribución al estudio de la flora de Granada: This paper is
about plants of Granada (a Spanish province) but Pau described two varieties from
Morocco by comparing African with Iberian samples, both typified here.
Celsia barnadesii var. mauritanica
This taxon was first mentioned by Pau (1922: 59), where he compared the
Moroccan and Spanish specimens (“difieren ligeramente del tipo español … por sus
cápsulas menores y oblongas”), and mentioned the locality of this variety as “en

abundancia en las cercanías de Zeluán”. Some years later, Pau (1929) subsequently
proposed it as a species and indicated that the collection date was May 2, 1910. In the
latter publication, Pau (1929) cited Celsia battandieri Murb. as a synonym since
Murbeck included the original material of Selouane collected by Pau in the publicaction
of this new species (Murbeck, 1925).
We have found three sheets at MA, all of them with a printed label of the Sennen
exsiccata “1929 - PLANTES D’ESPAGNE – SENNEN Nº 6982” (Pau donated this
material to Sennen for its distribution). The determination indicated on this printed label
is Celsia mauritanica Pau. Among these three sheets, we propose the MA barcode
MA108921 as the lectotype because it includes (1) an original label by Pau as C.
barnadesii var. mauritanica, and (2) a large number of capsules whose size and shape
are diagnostic for this variety, according to the protologue. Sennen distributed this
exsiccata to different herbaria as evidenced by the isolectotypes found in BCN and P.
The specimen cited by Murbeck (1925) is conserved in LD herbarium. Although it
is cited as “Tetuan, leg. Carlos Pau, 9/5 1910”, Pau (1929) indicated that Murbeck had
wrongly transcribed Pau’s original handwritten label with the real locality (“Zeluan”)
and real date (“2.5.1910”). The name indicated by Pau in the label, Celsia barnadesii, is
crossed out by Murbeck, who determinated it as C. battandieri. Even through it is not
labelled as var. mauritanica, the plant and the information of the gathering match that of
Pau’s publication and can be considered as an isolectotype.
There is also a specimen preserved in G herbarium [Charles Joseph-Marie Pitard’s
collection, who was a French correspondent of Pau (see Mateo, 1995)] collected by Pau
from Selouane on May 2. Although the year is not indicated on the G specimen, we
know that Pau only visited Selouane in 1910 (Mateo, l.c.). Instead of the printed Sennen
label, it bears a label of “Plantas Españolas” (the first labels used by Pau), and it is only
identified as Celsia barnadesii (without indicating variety); it seems that Pau donated
this specimen before the description of the variety published in 1922 and used a label of
his Spanish herbarium. However, the plant and the information on the locality, date and
collector match the protologue and can be considered also as an isolectotype.
Dobignard & Chatelain (2010–2013) included this variety in Verbascum
battandieri (Murb.) Hub.-Mor. The G, P and BCN sheets (designated here as
isolectotypes) have a revision label by Benedí in 2002 who re-determined them as V.
battandieri. Moreover, Murbeck (1925), in his description of Celsia battandieri, cited
the LD sheet as syntype of this species, so he considered that the characters of Pau’s
variety are included in the variability of this species.
Celsia barnadesii var. mauritanica Pa in Mem. Mus. Ci. Nat. Barcelona, Ser. Bot. 1(1):
59. 1922 ≡ Celsia mauritanica (Pau) Pau, Monde Pl. 30(181): 1. 1929 –
Lectotype (designated here): Maroc: Riff oriental aux alentours de Zeluan, 2

May 1910, C. Pau s.n. (MA barcode MA108921!; isolectotypes: BCN No 52463
[photo!], G barcode G00414977 [photo!], LD barcode 1967555 [photo!], MA
barcode MA108919!, MA barcode MA108920!, P barcode P03425530 [digital
image!]).
= Verbascum battandieri (Murb.) Hub.-Mor. in Bauhinia 5(1): 10. 1973 ≡ Celsia
battandieri Murb., Monogr. Celsia: 209. 1925 – Type: not designated.
Centaurea fragilis var. zeluana
Pau (1922: 52) mentioned this variety by indicating that in his herbarium there
were some curious forms close to Centaurea malacitana Boiss. with pinnatifid basal
leaves and entire upper leaves (“Forma intermedia inter genuinam et malacitanam;
folia sup. integra ut in hispanica, basilaria pinnatifida”). Although there is no
indication of locality in the protologue, the variety name “zeluana” should be referred to
Selouane (= Zeluan).
There are two sheets labelled as Centaurea fragilis var. zeluana and collected by
Pau in Selouane, one in MA herbarium and another in BC herbarium. Besides, the BC
specimen bears the indication “var. nova” handwritten by Pau. We select the one
conserved in MA herbarium as the lectotype, since this herbarium includes the main
collection of Pau. According to our examination of this MA specimen and also the
revision label in the BC specimen added by Garcia-Jacas & Susanna in 2005, the
features characterizing this variety are included in the variability of C. fragilis Durieu,
an endemism from Morocco (El Oualidi & al., 2012). Although no original material of
C. fragilis has been seen, according to the description made by Durieu (1847), this
species includes plants with pinnatipartid basal leaves and entire upper leaves, the
characters of Pau’s variety.
Centaurea fragilis var. zeluana Pau in Mem. Mus. Ci. Nat. Barcelona, Ser. Bot. 1(1): 52.
1922. – Lectotype (designated here): [MOROCCO] Zeluan, Riff, C. Pau s.n.
(MA No. 136438 [photo!]; isolectotypes: BC barcode BC-35333!).
= Centaurea fragilis Durieu in Rev. Bot. Recueil Mens. 2: 429. 1847 – Type: not
designated.

ACKNOWLEDGEMENTS
We gratefully acknowledge the help of the staff of MA herbarium, especially C.
López and M. Fernández in searching for specimens, and consulting the database and
specimen images. Special thanks are due to R. Guàrdia (BCN), L. Gautier (G), P.

Frödén (LD) and P. Moulet (AV, Mus. Requien) for providing images of the requested
specimens. We also acknowledge the support of the Generalitat de Catalunya,
government of Catalonia (“Ajuts a grups de recerca consolidats”, 2014SGR514). The
authors also thank three anonymous reviewers for their valuable comments on the
manuscript.

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