|
Note - this takes you off
of our website |
GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Arrhenatherum kotschyi
HABIT Perennial; caespitose; clumped loosely. Rhizomes elongated. Culms erect; 17–30(–100) cm long; 1–2 -noded; not swollen at the base, or swollen at the base; forming an ovoid corm. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 1.5–2.5 mm long; truncate, or obtuse. Leaf-blades 6–25 cm long; 1–4 mm wide. Leaf-blade surface smooth, or scaberulous. Leaf-blade apex acuminate.
INFLORESCENCE Inflorescence a panicle.
Panicle open; lanceolate, or oblong; dense; 6–15 cm long; 2–5 cm wide.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels curved; scabrous.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 12–16 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 1.5–2 mm long; pilose (hairs 5–7mm). Floret callus pilose.
GLUMES Glumes persistent; dissimilar; reaching apex of florets; thinner than fertile lemma; shiny; gaping. Lower glume lanceolate; 6.5–9 mm long; 0.5–0.66 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 12–13.5 mm long; 1.2 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acuminate.
FLORETS Basal sterile florets male; with palea; attached to and deciduous with the fertile. Lemma of lower sterile floret elliptic; 13–15 mm long; chartaceous; much thinner above; 7 -veined; villous; dentate; 2 -fid; setaceously attenuate (lateral awns 1–2.5mm); awned. Awn of lower sterile floret dorsal; arising 0.1 way up back of lemma; geniculate; 25–40 mm long. Fertile lemma elliptic; 9–10 mm long; chartaceous; much thinner above; without keel; 7 -veined. Lemma surface villous. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn subapical; 10–16 mm long overall. Palea keels ciliolate.
FLOWER Anthers 3; 2.3–4.6 mm long. Ovary pubescent all over.
FRUIT Caryopsis with adherent pericarp; oblong.
DISTRIBUTION Asia-temperate: Caucasus and western Asia.
NOTES Aveneae. Fl Turk 1993.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
