Ptilagrostis

<i>Ptilagrostis</i>

Ptilagrostis

Genus of grasses

Ptilagrostis is a genus of grasses in the family Poaceae. They are distributed in Asia and North America.[2] They are known commonly as false needlegrasses.[3]

Quick Facts False needlegrasses, Scientific classification ...

Plants of this genus were originally separated from the genus Stipa,[4] and their relationship to that genus is still unclear. Some authorities still include them in Stipa,[5] sometimes classifying Ptilagrostis as a section of that genus.[2] Some species are difficult to separate, being intermediate in form.[2]

Most Ptilagrostis are variable plants. Many species have several forms and variants.[2] The genus is characterized in part by the papery, toothed lemmas of the spikelets, which have bent, plume-haired awns and do not overlap. This character separates the genus from Stipa and another close relative, the genus Achnatherum.[6] Ptilagrostis species are generally tufted perennial grasses with erect stems. The spikelets are borne in an open or somewhat open panicle. Each has one flower. The awn is twisted and bent once or twice.[2]

Species[7][3][2][6][8]
formerly included[7]

see Stipa

  • Ptilagrostis tianschanica - Stipa tianschanica

References

  1. [1]
    Grisebach, August Heinrich Rudolf. 1852. Flora Rossica; sive, Enumeratio plantarum in totius Imperii Rossici provinciis Europaeis, Asiaticis et Americanis hucusque observatarum 4(13): pages 447-448, §1084 in Latin
  2. [2]
    Flora of China Vol. 22 Page 204 细柄茅属 xi bing mao shu Ptilagrostis Grisebach in Ledebour, Fl. Ross. 4: 447. 1852.
  3. [3]
    Ptilagrostis. Integrated Taxonomic Information System (ITIS).
  4. [4]
    Hamasha, H. R., et al. (2012). Stipa (Poaceae) and allies in the Old World: molecular phylogenetics realigns genus circumscription and gives evidence on the origin of American and Australian lineages. Plant Systematics and Evolution 298(2), 351-67.
  5. [5]
    Ptilagrostis. Germplasm Resources Information Network (GRIN).
  6. [6]
    Peterson, P. M., et al. (2005). Ptilagrostis luquensis (Poaceae: Pooideae: Stipeae: Stipinae), a new species from China. Sida 21, 1355-62.
  7. [7]
    Kew World Checklist of Selected Plant Families
  8. [8]
    GRIN Species Records of Ptilagrostis. Germplasm Resources Information Network (GRIN).
  9. [9]
    Nobis, M. and A. Nobis. (2013). Ptilagrostis milleri comb. nov. (Poaceae: Stipeae). Nordic Journal of Botany 31(5), 623–25.
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