Stipa brachyglumis

HABIT Perennial; caespitose; clumped densely. Culms erect; 30–60 cm long; 1.5–2 mm diam.; 2–3 -noded. Culm-internodes distally glabrous. Leaf-sheath oral hairs ciliate; 1.5–2 mm long. Ligule a ciliolate membrane; 0.5–6 mm long. Collar glabrous. Leaf-blades filiform; convolute; 0.6–1 mm wide; stiff. Leaf-blade surface glabrous. Leaf-blade apex attenuate; muticous.

INFLORESCENCE Inflorescence a panicle; embraced at base by subtending leaf.

Panicle contracted; linear.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 8–15 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; curved; 1.5–2 mm long; acute.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 8–15 mm long; 1 length of upper glume; hyaline; without keels. Lower glume apex attenuate. Upper glume linear; 8–15 mm long; 1.1 length of adjacent fertile lemma; hyaline; without keels. Upper glume apex attenuate.

FLORETS Fertile lemma linear; subterete; 7.5–11 mm long; chartaceous; without keel. Lemma surface papillose; glabrous. Lemma margins convolute; covering most of palea. Lemma apex with a membranous corona and surmounted by a ring of hairs (on membrane); with this appendage 0.8–1 mm long; awned; 1 -awned. Principal lemma awn bigeniculate; 40–65 mm long overall; with 20–36 mm long limb; with twisted column. Middle segment of lemma awn 7–11 mm long. Column of lemma awn 11–18 mm long; pubescent; with 0.5 mm long hairs. Palea 1.5 mm long; 0 -veined.

DISTRIBUTION South America: southern South America.

NOTES Stipeae. Fl San Juan 2011.

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