Agrostis thurberiana

Secure  (NatureServe)
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Clade: Commelinids
Order: Poales
Family: Poaceae
Subfamily: Pooideae
Genus: Agrostis
Species:
A. thurberiana
Binomial name
Agrostis thurberiana

Agrostis thurberiana is a species of grass that is native to northwest and southwest United States and Canada (the Aleutian Islands, Alaska, British Columbia, Colorado, Oregon, Washington and California).[1]

Description

The species is perennial with short rhizomes and 15–30 centimetres (5.9–11.8 in) long culms. It has smooth leaf-sheaths with an eciliate membrane that is 1–3 millimetres (0.039–0.118 in) long and goes around the ligule. It is also lacerate, truncate and obtuse with the leaf blades being 0.5–3 millimetres (0.020–0.118 in) wide. The panicle is open, inflorescenced, lanceolate, and is 5–10 centimetres (2.0–3.9 in) long. The species' spikelets are 2–2.3 millimetres (0.079–0.091 in) long and are both elliptic and solitary with pedicelled fertile spikelets and one fertile floret which have a hairy callus.[2]

The glumes are 2–2.3 millimetres (0.079–0.091 in) long and are lanceolate, membranous and have one keel. They also have scaberulous veins and acute apexes. It have a hairy and 0.1–0.3 millimetres (0.0039–0.0118 in) long rhachilla and elliptic 2 millimetres (0.079 in) long and keelless fertile lemma while the lemma itself have a dentated apex. Flowers have two 0.5–0.6 millimetres (0.020–0.024 in) long lodicules which are membranous while the stamens (of which there are three of) are 0.4–0.6 millimetres (0.016–0.024 in) long. The hilum is linear while the fruits are caryopses with an additional pericarp.[2]

Distribution

It is native to the west of North America, from the Aleutian Islands to California. In California, it is found growing along with lodgepole pine and red, and subalpine firs on various wetlands.[3]

References

  1. 1 2 "Agrostis thurberiana". World Checklist of Selected Plant Families. Royal Botanic Gardens, Kew. Retrieved 2018-01-16.
  2. 1 2 W.D. Clayton; M. Vorontsova; K.T. Harman; H. Williamson (November 16, 2012). "Agrostis thurberiana". The Board of Trustees and Royal Botanic Gardens. Kew: GrassBase. Retrieved December 5, 2013.
  3. ↑ "Agrostis thurberiana A. Hitchc". CalFlora. Retrieved December 5, 2013.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.