Selaginella longistrobilina (Selaginellaceae), a New Species from Guizhou, China, and Selaginella prostrata , a New Combination and Its Lectotypification

2012·3 MB·English

by  Li-Bing Zhang

New
Selaginella longistrobilina (Selaginellaceae), a Species from
New
Guizhou, China, and Selaginella prostrata a Combination and
,
Lectotypification
Its

262 Novon
P.^Wang
crevices"on 1500 m, 24 June 1978, 75550
hill,
Wang
(PYU, Herbarium Pei-Shan [Guizhou
Institute of
Biology]).
IUCN
Red List category. Only two populations of
Selaginella longistrobilina were observed the type
at
Selaginella prostrata (H. Kung) Li Bing Zhang,
S.
20
locality, with fewer than individuals in total found.
comb. nov. Basionym: Lycopodioides prostrata
The new
species might occur elsewhere in a nearby
7-
H. Kung, Sichuan.
S. LI. 6: 76, pi. 20, parts:
similar habitat. Based on the best evidence available, &
11. 1988. [Latin diagnosis description in
taxon can be Endangered
this classified as Critically
TYPE.
Kung, Acta Yunnan. 254.
Bot. 3: 1981.]
IUCN
Red
(CR) according (IUCN,
to List criteria
Emei
China. Sichuan: Shan, Jiushijiudaoguai,
2008).
Shouxingqiao, 4 July 1955, Zheng 30071
X.-J.
SZ
(lectotype, designated here, PE; isolectotype,
The new
Etymology. epithet of the species
is
taken from the Latin prefix, “longi-,” meaning
and meaning
“long,” the Latin “strobilina,” “of the
When
Kung
Discussion. (1981: 254) described
which
strobilus,” refers to the long strobili.
he
his Selaginella prostrata cited three gatherings:
,
NE
Discussion. Selaginella longistrobilina has been X.-J. Zheng 30071 from Sichuan, Yunnan Exp.
PYU
(KUN
confused with prostrata (H. Kung) Li Bing 808 not seen, PE, not seen) from Yunnan,
S. S.
Wang MO, PYU,
Zhang and 75606 (CDBI, Herbarium
(comb, nov.; see below) since the publication P.-S.
Wang
Pei-Shan [Guizhou from
of the basionym of the Lycopodioides prostrata Institute of Biology])
latter,
&
Kung Wang Wang,
H. (Kung, 1988; 2001).
S.
Chu name
When type, as noted by (2006). Therefore, this
describing a taxon identified as “prostrata”
Kung
name was not validly published by in 1981, following
(Kung, 1981; the not validly published; see
Kung the International Code of Botanical Nomenclature
later discussion), (1981) cited three gatherings
from Guizhou, Sichuan, and Yunnan, which included (McNeill et al., 2006, Art. 37.1).
Kung made new
Later, (1988: a combination,
76)
“Lycopodioides prostrata (H. Kung) H. Kung,”
correspond with Kung’s “prostrata” (Chu, 2006), S. S.
name Kung
based on 1981
his invalid in Selaginella.
while the collection from Guizhou selected herein
is
(1988: implicated one of the three gatherings
as the type of the newly described longistrobilina. 76)
S.
Kung Zheng 30071
cited in (1981) as the type, X.-J.
Both taxa are indeed similar each other in the
to
from Emei Shan in Sichuan, by stating that “the type
shape of the microphylls and also share other
was collected from Emei Shan” in Chinese. This type
similarities in the arrangement, shape, and size of
designation, together with Kung’s (1988: 76) refer-
the sporophylls. However, the two taxa do differ in the
ence to the previously and effectively published Latin
morphology
of their strobili, sporophylls, sculpturing
description and diagnosis by him (Kung, 1981: 254),
of spores, and colpi of microspores as noted by Chu
Kung
validated the publication of prostrata H.
L. S.
(2006). Selaginella longistrobilina often has strobili
new
(1988) as a species (McNeill et al., 2006: Art.
new name
36.1) instead of a combination or the S.
branching positions of ultimate branchlets upward.
Kung
prostrata H. Kung, which did not
S. (1988)
The and
larger sporophylls are adaxial clearly
intend publish. Article 37.7 does not apply, since
to
navicular. Microspores have verrucate sculpturing
was by
the specific deposit of the type not required
with irregularly sized verrucae; the colpi of micro-
the Code until 1990. The herbarium of deposit for the
and
spores are twisted, usually not forked the ends,
at
Kung
was by
type of prostrata not indicated
L. (1988).
they reach the equatorial plane of the spore.
known Zheng
There are two specimens to us for X.-J.
Irregularly verrucate sculpturing of the microspores
PE
30071, which are deposited and SZ, and herein
at
common among
species of Selaginella P. Beauv. In
is
We
PE
we specimen
designate the as lectotype.
at
3-4
contrast, S. prostrata has shorter strobili, to only
PE
were able to confirm the taxonomic identity of the
mm,
and
the sporophylls are located only the
at
sheet, but did not see the SZ specimen, and thus the
known PE
specimen
better chosen.
is
flattened adaxially, with only a few of the upper,
We
adaxial sporophylls slightly navicular. The micro- Acknowledgments. thank Wei-Ming Chu of
spores are tuberculate with regularly sized tuber-
cules; the microspore colpi are straight, forked at the rizing the differences between Selaginella long-
We
ends, and do not extend to the equatorial plane. istrobilina and S. prostrata. thank Faqiang Lii