Stipa klimesii var. pubescens M. Nobis

Nobis, Marcin, Nobis, Agnieszka, Nowak, Arkadiusz & Nowak, Sylwia, 2014, Stipa klimesii (Poaceae), a new species from Western Himalayas (India), Phytotaxa 174 (3), pp. 173-180: 176-177

publication ID

http://doi.org/ 10.11646/phytotaxa.174.3.6

persistent identifier

http://treatment.plazi.org/id/AF6387F3-FFF1-FFB3-BCDB-FBEAFAC55ED6

treatment provided by

Felipe

scientific name

Stipa klimesii var. pubescens M. Nobis
status

var. nov.

Stipa klimesii var. pubescens M. Nobis   , var. nov.

Type:— INDIA. NW India, Jammu and Kashmir State, Ladakh, Zanskar : Zara , Spangchen Do , 4520 m a.s.l., 1 September 2001, 33°22.7’N / 77°45.1’E, L GoogleMaps   . Klimeš 1477 (holotype KRA!, isotype PRA!)   GoogleMaps   .

This taxon has shortly pubescent sheaths of culm leaves, vs. glabrous sheaths of culm leaves in the nominal variety.

Similar species:― Stipa klimesii   is morphologically similar to S. roborowskyi   . The two species differ from each other mainly in the character of ligules of vegetative shoots, which in S. klimesii   are always longer [(2–)3.5–7.5(–9) vs. 0.5–1.5(–2) mm]. Additionally, the new species has a longer anthecium [(7–)8.3–9.5(–10.5) vs. (6.0–)6.5–7.5(–7.7) mm] and longer hairs on seta [(1–)1.3–2(–2.3) vs. (0.3–)0.5–1.1(–1.4) mm]. Other characters differing between S. klimesii   and S. roborowskyi   are listed in Table 1 and illustrated in Figs. 1–2 View FIGURE 1 View FIGURE 2 .

The original material of S. roborowskyi   (holotype in LE!, isotype in W!) has very short hairs on seta, not longer than 0.7 mm ( Roshevitz 1920). A similar length of hairs on seta is given for S. roborowskyi   in the Flora of China ( Wu & Phillips 2006). However, during revision of herbarium material of the species from China, we observed that the length of hairs on seta varies from 0.3 up to 1.4 mm.

Although Stipa roborowskyi   is listed as a member of the flora of Ladakh ( Freitag 1985, Klimeš & Dickoré 2006), all material seen and previously referred to S. roborowskyi   is in fact S. klimesii   . Stipa roborowskyi   occurs in Pamir, Karakorum, Kunlun and the Inner Himalayas ( Tzvelev 1968, Freitag 1985, Lu & Wu 1996, Wu & Wang 1999, Noltie 2000). Specimens of S. roborowskyi   collected from south-western China and Nepal ( Dickoré 1995, Wu & Phillips 2006) need to be revised.

Stipa klimesii   is also similar to S. purpurea   . These two species differ in the shape of their panicle, which in S. klimesii   is contracted with straight branches, and in S. purpurea   is lax with flexuous branches. In contrast to S. purpurea   , S. klimesii   has longer ligules of the vegetative shoots, shorter awn and seta ( Table 1). Moreover, the hairs on seta in S. klimesii   are shorter to equal than those occurring on the column, whereas in S. purpurea   the hairs on seta are longer than to equal to those on the column.

Stipa purpurea   is a polymorphic and variable taxon, particularly in the lengths of its glumes, anthecium, callus, awn, as well as the hairiness of its anthecium. Stipa purpurea   is a widely distributed species in the central Asian mountains, occurring from India, Pakistan, Afghanistan via Tajikistan, Uzbekistan, Kyrgyzstan to southern Kazakhstan and via central China up to Nepal and Bhutan ( Tzvelev 1968, 1976, Freitag 1985, Lu & Wu 1996, Noltie 2000).

Based on the morphology of its anthecium, which is completely covered by dense, short hairs, Stipa klimesii   is somewhat similar to S. purpurea var. arenosa Tzvelev (1968: 60)   , which occurs in mountains of Central Asia ( China). However, these taxa differ in the lengths of their awns, anthecium and glumes; in S. klimesii   these structures are much shorter than in S. purpurea var. arenosa ( Tzvelev 1968)   .

Micromorphological variation:― Stipa klimesii   differs from the above-mentioned species in its lemma micromorphology, especially in the shape of silica bodies ( Fig. 2 View FIGURE 2 ). In S. klimesii   silica bodies are ovate and/or elliptic to elongated, often with a single shallow constriction at the mid-point ( Fig. 2B, C View FIGURE 2 ). In S. roborowskyi   and S. purpurea   silica bodies are reniform or broadly-elliptic to more or less rectangular, without constrictions ( Fig. 2E, F, H, I View FIGURE 2 ). In comparison to S. roborowskyi   and S. purpurea   , the new species also has smaller and less frequent hooks ( Fig. 2 View FIGURE 2 ). All of these species have a narrowly elliptic scar on the callus base ( Fig. 2 A, D, G View FIGURE 2 ) and a densely pilose callus. However, hairs on callus in S. roborowskyi   are generally somewhat longer than in S. klimesii   and S. purpurea   ( Table 1).

L

Nationaal Herbarium Nederland, Leiden University branch

KRA

Jagiellonian University

PRA

Institute of Botany, Academy of Sciences

LE

Servico de Microbiologia e Imunologia

W

Naturhistorisches Museum Wien

A

Harvard University - Arnold Arboretum

Kingdom

Plantae

Phylum

Tracheophyta

Class

Liliopsida

Order

Poales

Family

Poaceae

Genus

Stipa

Loc

Stipa klimesii var. pubescens M. Nobis

Nobis, Marcin, Nobis, Agnieszka, Nowak, Arkadiusz & Nowak, Sylwia 2014
2014
Loc

S. klimesii

M. Nobis 2014
2014
Loc

Stipa klimesii

M. Nobis 2014
2014
Loc

S. klimesii

M. Nobis 2014
2014
Loc

S. klimesii

M. Nobis 2014
2014
Loc

S. klimesii

M. Nobis 2014
2014
Loc

Stipa klimesii

M. Nobis 2014
2014
Loc

S. klimesii

M. Nobis 2014
2014
Loc

S. purpurea var. arenosa

Tzvelev 1968: 60
1968
Loc

Stipa roborowskyi

Roshevitz 1920
1920
Loc

S. roborowskyi

Roshevitz 1920
1920
Loc

Stipa roborowskyi

Roshevitz 1920
1920
Loc

S. roborowskyi

Roshevitz 1920
1920
Loc

S. purpurea

Grisebach 1868
1868
Loc

S. purpurea

Grisebach 1868
1868
Loc

S. purpurea

Grisebach 1868
1868
Loc

S. purpurea

Grisebach 1868
1868
Loc

Stipa purpurea

Grisebach 1868
1868
Loc

Stipa purpurea

Grisebach 1868
1868