Multivariate morphometric analysis of the Stipa turkestanica group (Poaceae: Stipa sect. Stipa)

et al. 2016

Phytotaxa

Self Cite

Stipa dickorei sp. nov. from the Western Tibetan Plateau (China) is described. The new species is morphologically similar to S. regeliana, but they differ from each other in the length of ligules of vegetative shoots. Stipa dickorei is also similar to S. aliena, however they differ in the shape of panicle, which is contracted with straight branches in S. dickorei, and lax with flexuous branches in S. aliena. Images of macromorphological and micromorphological structures of the new taxon are provided. Additionally, new records of S. borysthenica, S. richteriana, and S. zalesskii, species not listed in the recent Flora of China, as well as a checklist of Chinese feather grasses are also presented.

Section: Checklist Of Feather Grasses (Stipa) Of Chinamentioning

confidence: 99%

mentioning

confidence: 99%

Stipa dickorei sp. nov. (Poaceae), three new records and a checklist of feather grasses of China

et al. 2016

Phytotaxa

Self Cite

“…However, according to the results of recent studies based on morphological and genetic data, all Australian, American and a subset of Eurasian species of Stipa s.l. have been removed from the genus, limiting Stipa s.s. to about 150 species, distributed in warm temperate regions of the Old World (Roshevitz 1934, Barkworth 2007, Bor 1970, Tzvelev 1968, 1976, Martinovský 1980, Freitag 1985, Wu & Phillips 2006, Hamasha et al 2012, Romaschenko et al 2012, Nobis 2013, Nobis et al 2016a, 2016b, Nobis & Gudkova 2016.…”

Section: Abstract: Multivariate Analysis Stipa Lessingiana Synonymimentioning

confidence: 99%

“…Analyses were carried out using STATISTICA v. 10 (Statsoft Inc. 2011) andPAST v. 3.12 (Hammer et al 2001). For methods see Nobis et al (2016a). Principal component analysis (PCA) resulted in delimitation of two main clusters corresponding to S. borysthenica and S. lessingiana.…”

mentioning

confidence: 99%

Stipa baktashevae, a new synonym of Stipa borysthenica (Poaceae)

2016

Phytotaxa

Self Cite

Numerical analyses of macromorphological characters of specimens of S. lessingiana, S. borysthenica and S. baktashevae, nested the last one among individuals of S. borysthenica. We propose synonymization of S. baktashevae, the species described in 2014 and known only from type material, with S. borysthenica, and provide morphological comparisons of the taxa. Keywords: multivariate analysis, Stipa lessingiana, synonymizationStipa Linnaeus (1753: 78) s.l. is one of the largest genera of Poaceae. Circumscribed broadly it comprises over 300 species common in steppe zones of Central Asia, Southern Europe, Australia and the Americas. However, according to the results of recent studies based on morphological and genetic data, all Australian, American and a subset of Eurasian species of Stipa s.l. have been removed from the genus, limiting Stipa s.s. to about 150 species, distributed in warm temperate regions of the Old World (Roshevitz 1934, Barkworth 2007, Bor 1970, Tzvelev 1968, 1976, Martinovský 1980, Freitag 1985, Wu & Phillips 2006, Hamasha et al. 2012, Romaschenko et al. 2012, Nobis 2013, Nobis et al. 2016a, 2016b, Nobis & Gudkova 2016.Stipa baktashevae Tzvelev (2014: 7) was recently described from material collected on sandy grasslands in the Republic of Kalmykia (southwest Russia). The author pointed out that the species originated from hybridization of S. borysthenica Klokov ex Prokudin (1951: 25) and S. lessingiana Trinius & Ruprecht (1842: 79). Based on the original description S. baktashevae has morphological characteristics intermediate between the two putative parental species, including: leaves of vegetative shoots 0.4-0.5 mm in diameter, abaxial surface scabrous due to pointed tubercles, adaxial surface scabrous; ligules very short, 0.4-0.5 mm long; lemmas 15-18 mm long, distance from the end of ventral line of hairs to the top of anthecium 4-5 mm; awns 25-32 cm long, bigeniculate with lower part (column) glabrous and upper part (seta) plumose, with hairs 3-4.5 mm long (Tzvelev 2014).During revision of herbarium materials of Stipa we came across type material of Stipa baktashevae and found morphological variation in the taxon to differ somewhat from that described in the protologue. Based on measurements made by us on the holotype-the only known specimen of the taxon-ligules of vegetative leaves are 0.4-1.5 mm long (not 0.4-0.5 mm, as stated in the diagnosis); hairs on the lower part of seta are generally 4.0-4.5 mm long (not 3.0-4.5 mm long) and the anthecium is 16.5-18.5 mm long (instead of 15-18 mm long). In S. borysthenica ligules of vegetative leaves are (0.4-)0.9-2.2(-3.4) mm long, hairs on seta are 4.5-6.9 mm long (however, their length can be variable, and occasional hairs somewhat shorter than 4.5 mm long were found) and the anthecium is 16-20 mm long. In S. lessingiana leaves are scabrous to hairy-scabrous (due to prickles, spinules and hairs, which occur on the abaxial leaf-surface), ligules of vegetative leaves are 0.05-0.25 mm long, hairs on seta are generally 1.8-3.5 mm long and t...

“…One of the numerous and taxonomically problematic sections in the genus Stipa is the nominal section, which comprises (depending on the approach) from 15 to 55 species (Smirnov 1925, Martinovský 1965, 1970, 1977, 1980, Klokov and Osychnyuk 1976, Tzvelev 1976, 1986, Freitag 1985, Vázquez and Gutiérrez 2011, Gonzalo et al 2013, Nobis et al 2016b). In Central Europe (including Czech Republic, Germany, Poland, Slovakia, Hungary and Austria), the section Stipa is represented by about 10 taxa: S. bavarica Martinovský and Scholz (1968), S. borysthenica Klokov ex Prokudin (1951), S. dasyphylla (Ćernjaev ex Lindemann 1882) Trautvetter (1884), S. eriocaulis Borbás (1878) subsp. eriocaulis, S. eriocaulis subsp. austriaca (Beck von Mannagetta 1890) Martinovský (1965), S. pennata Linnaeus (1753), S. pulcherrima Koch (1848), S. styriaca Martinovský (1970), S. tirsa Steven (1857) and S. zalesskii Wilensky ex Smirnov (1925) (conf.…”

Section: Introductionmentioning

confidence: 99%

Stipa pennata subsp. ceynowae (Poaceae, Pooideae), a new taxon from Central Europe

2017

Self Cite

Based on numerical analyses of macromorphological characters, scanning electron microscopy observation of leaves and lemma micromorphology, as well as field observations, Stipa pennata subsp. ceynowae was described here as a new taxon from Poland. It differs from the most similar S. pennata subsp. pennata and S. borysthenica mainly by its longer ligules of vegetative shoots. The affinities of this taxon are discussed and a morphological comparison with related species is provided. Illustrations and images of the micromorphological structures, as well as information about its distribution, habitat and conservation status are given.