Aristida glaziovii

HABIT Perennial. Culms 100–130 cm long. Lateral branches sparse, or lacking. Leaf-sheath oral hairs bearded. Ligule a fringe of hairs; 0.3–0.5 mm long. Collar glabrous, or pubescent. Leaf-blades curled (lower), or straight (upper); flat (lower), or convolute (upper); 18–39 cm long; 1.5–4.5 mm wide. Leaf-blade surface scabrous; rough adaxially; pilose; sparsely hairy; hairy adaxially. Leaf-blade apex acute; antrorsely scabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted (or subcontracted); 20–37 cm long.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets subterete; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; straight; 0.8–1 mm long; pilose; acute.

GLUMES Glumes persistent; dissimilar (lower longer than upper). Lower glume lanceolate; 7.5–12 mm long; 1 -veined. Lower glume primary vein scabrous. Lower glume apex acute. Upper glume lanceolate; 5.5–8 mm long; 1 -veined. Upper glume surface smooth. Upper glume apex entire; acute.

FLORETS Fertile lemma subterete; 7–9.8 mm long; without keel; rounded throughout; 3 -veined. Lemma surface scabrous; rough generally; without grooves. Lemma margins involute. Lemma apex awned; 3 -awned. Principal lemma awn straight; ascending; simple at base; with 17–30 mm long limb; without a column. Lateral lemma awns ascending; 14–28 mm long; shorter than principal.

DISTRIBUTION South America: western South America and Brazil.

NOTES Aristideae. LO-W 1993.

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