New! - Search other data sources for Deyeuxia cainii

Help - Wrong Description?

Kew Data Sources

Kew's Herbarium Catalogue
ePIC - Electronic Plant Information Centre

External Data Sources

Note - this takes you off of our website
Use your browser's back button to return to this page

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 cainii

HABIT Perennial. Culms erect; 30–40 cm long. Leaf-sheaths smooth; glabrous on surface. Leaf-sheath oral hairs lacking. Ligule an eciliate membrane; 1–2 mm long; erose, or lacerate; obtuse. Leaf-blades 5–35 cm long; 1–2 mm wide. Leaf-blade surface scaberulous; rough adaxially. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence a panicle. Peduncle antrorsely scabrous above.

Panicle open; ovate; 6–10 cm long. Primary panicle branches ascending, or spreading; whorled at most nodes; 1–2 cm long; bearing 1–3 fertile spikelets on each lower branch. Panicle axis scabrous. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; pubescent.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 5–6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 1 mm long; 0.25 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 primary vein scabrous. Lower glume lateral veins absent. Lower glume apex attenuate. Upper glume lanceolate; 5–6 mm long; 1.2 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume apex attenuate.

FLORETS Fertile lemma lanceolate; 4–5 mm long; membranous; without keel; 5 -veined. Lemma surface asperulous; rough above. Lemma apex dentate; 4 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.25 way up back of lemma; geniculate; 4–5 mm long overall; not or scarcely exserted from spikelet; with a straight or slightly twisted column. Palea 0.9 length of lemma. Rhachilla extension 0.5 mm long; pilose; with 1–2 mm long hairs.

FLOWER Lodicules 2. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a floret.

DISTRIBUTION North America: southeast USA.

NOTES Aveneae. N Amer Fl 1994.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.