Stipa colloncurensis

HABIT Perennial; caespitose. Butt sheaths red. Culms erect; 50–60 cm long; 2–3 -noded. Culm-internodes distally glabrous. Leaf-sheaths 13–16 cm long. Leaf-sheath oral hairs ciliate. Ligule a ciliolate membrane. Collar glabrous. Leaf-blades filiform; conduplicate; 20–30 cm long. Leaf-blade surface glabrous. Leaf-blade apex attenuate; muticous.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; lanceolate; 11–15 cm long; 2–3 cm wide.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 30–37 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; curved; 2.5 mm long; pungent.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume linear, or lanceolate; 30–37 mm long; 1 length of upper glume; hyaline; without keels. Lower glume primary vein ciliolate. Lower glume apex acuminate. Upper glume linear, or lanceolate; 30–33 mm long; 2 length of adjacent fertile lemma; hyaline; without keels. Upper glume primary vein ciliolate. Upper glume apex attenuate.

FLORETS Fertile lemma lanceolate; subterete; 12–14 mm long; coriaceous; without keel. Lemma surface pilose; hairy all along. Lemma margins convolute; covering most of palea. Lemma apex surmounted by a ring of hairs; with this appendage 1 mm long; awned; 1 -awned. Principal lemma awn geniculate; 45–55 mm long overall; with 28–351 mm long limb; with twisted column. Column of lemma awn 17–20 mm long; ciliate. Palea 8.6 mm long; 0.66 length of lemma; without keels. Palea surface pilose; hairy on back.

FLOWER Lodicules 2.

DISTRIBUTION South America: southern South America.

NOTES Stipeae. Roig 2011.

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