Deyeuxia divergens

HABIT Perennial; caespitose. Culms erect; 50 cm long. Culm-internodes distally glabrous. Leaf-sheaths subequal to internodes; glabrous on surface. Ligule an eciliate membrane; 2 mm long; erose. Leaf-blades 15–20 cm long; 5–6 mm wide. Leaf-blade surface glabrous. Leaf-blade margins scabrous. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle open; oblong, or ovate; 11–12 cm long; 6 cm wide. Primary panicle branches ascending; 4–5 cm long.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1.3 mm long; glabrous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 3.2–3.7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.5 mm long; 0.1–0.15 length of lemma.

GLUMES Glumes persistent; similar; reaching apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 3.2–3.7 mm long; 1 length of upper glume; membranous; purple; 1-keeled. Lower glume apex acute. Upper glume lanceolate; 3.2–3.7 mm long; 1.1 length of adjacent fertile lemma; membranous; purple; 1-keeled. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 3 mm long; membranous; without keel; 5 -veined. Lemma surface scaberulous. Lemma apex erose; awned; 1 -awned. Principal lemma awn dorsal; arising 0.2 way up back of lemma; straight; 3 mm long overall; with twisted column. Palea 2.5 mm long. Palea keels approximate; scabrous. Rhachilla extension 1 mm long; pubescent.

FLOWER Anthers 3.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION South America: western South America.

NOTES Aveneae. Swallen 2004.

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