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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.
Deyeuxia przevalskyi
HABIT Perennial; caespitose; clumped loosely. Rhizomes short. Culms 4–10 cm long. Lateral branches lacking. Ligule an eciliate membrane. Leaf-blades 1.5–3.5 mm wide; glaucous. Leaf-blade surface scabrous; rough abaxially.
INFLORESCENCE Inflorescence a panicle; subtended by an inflated leaf-sheath.
Panicle spiciform; oblong, or ovate; 1.5–2.5 cm long; 1–1.5 cm wide.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4.5–6.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 0.33–0.5 length of lemma.
GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous. Lower glume apex acuminate. Upper glume lanceolate; 4.5–6.5 mm long; membranous; 1-keeled; 3 -veined. Upper glume surface scabrous. Upper glume apex acuminate.
FLORETS Fertile lemma lanceolate; 4 mm long; membranous; without keel; 5 -veined. Lemma apex awned; 1 -awned. Principal lemma awn dorsal; arising 0.1 way up back of lemma; geniculate; 5–6 mm long overall; with twisted column.
FLOWER Lodicules 2. Anthers 3. Stigmas 2.
FRUIT Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a floret.
DISTRIBUTION Asia-temperate: China.
NOTES Aveneae. Pl Cent Asia 1996.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.