Deyeuxia sclerophylla

HABIT Perennial; caespitose; clumped densely. Basal innovations intravaginal. Culms erect; 30–75 cm long; 2 -noded. Ligule an eciliate membrane; 3–4 mm long; acute. Leaf-blades conduplicate; 15–22 cm long; 1.5–2 mm wide; stiff. Leaf-blade surface scabrous; rough adaxially. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; linear; 10–15 cm long. Primary panicle branches simple, or sparsely divided; 2–5 cm long; bearing spikelets almost to the base. Panicle branches smooth, or scaberulous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 2 mm long.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 0.25–0.33 length of lemma.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 7 mm long; 1 length of upper glume; coriaceous; 1-keeled; 3 -veined. Lower glume surface asperulous. Lower glume apex acuminate. Upper glume lanceolate; 7 mm long; 1.4 length of adjacent fertile lemma; coriaceous; 1-keeled; 3 -veined. Upper glume surface asperulous. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 5 mm long; chartaceous; without keel; 7 -veined. Lemma surface scaberulous. Lemma apex dentate; 2 -fid; with lateral lobes bidentate; incised 0.33 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; curved; 4–6 mm long overall. Palea 1 length of lemma. Rhachilla extension 2 mm long; pilose.

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

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

DISTRIBUTION Asia-tropical: Papuasia.

NOTES Aveneae. Stapf 1994.

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