Deyeuxia eriantha

HABIT Perennial; caespitose; clumped densely. Basal innovations intravaginal. Culms erect; 35–50 cm long. Leaves mostly basal. Leaf-sheaths smooth; glabrous on surface. Ligule an eciliate membrane; 1–2 mm long. Leaf-blades erect; filiform; involute; 10–20 cm long; 1 mm wide. Leaf-blade surface puberulous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; oblong; loose; 7–15 cm long. Primary panicle branches 1–4 -nate. Panicle branches capillary.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 6–6.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.

GLUMES Glumes persistent; similar; reaching apex of florets; firmer than fertile lemma. Lower glume lanceolate; 6–6.5 mm long; 1 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume primary vein scabrous. Lower glume apex acuminate. Upper glume lanceolate; 6–6.5 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume apex attenuate.

FLORETS Fertile lemma lanceolate; 5–6 mm long; membranous; without keel; 5 -veined. Lemma surface pubescent, or pilose. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.5 way up back of lemma; geniculate; 4 mm long overall; clearly exserted from spikelet; with twisted column. Palea keels ciliolate. Palea apex dentate; 2 -fid. Rhachilla extension 2.5–3 mm long; pilose.

FLOWER Lodicules 2. Anthers 3; 3 mm long; purple. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Disseminule comprising a floret.

DISTRIBUTION North America: Mexico.

NOTES Aveneae. WDC 2001.

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