Deyeuxia scabriflora

HABIT Perennial; caespitose. Culms erect; 120 cm long. Culm-internodes distally glabrous, or pubescent. Leaf-sheaths subequal to internodes; without keel; smooth, or scaberulous. Ligule a ciliolate membrane; 2 mm long. Leaf-blades tapering towards sheath, or parallel-sided; 30–60 cm long; 5 mm wide; stiff. Leaf-blade surface glabrous. Leaf-blade apex pungent.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate; dense; 25 cm long; 1–1.5 cm wide. Primary panicle branches appressed; whorled at most nodes; 4–8 cm long.

Spikelets solitary. Fertile spikelets sessile, or sessile and pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 3–3.2 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.5 mm long; 0.15 length of lemma.

GLUMES Glumes persistent; similar; reaching apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 3–3.22 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 3–3.2 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 3 mm long; membranous; without keel; 5 -veined. Lemma surface scabrous. Lemma apex awned; 1 -awned. Principal lemma awn dorsal; arising 0.33 way up back of lemma; straight; 1.7 mm long overall; with twisted column. Palea 1 length of lemma. Rhachilla extension 0.8 mm long; pilose.

FLOWER Anthers 3.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION South America: northern South America.

NOTES Aveneae. Swallen 2004.

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