Poa ayseniensis

HABIT Perennial; caespitose. Culms erect; 25–50 cm long; 3 -noded; with 0.33 of their length below uppermost node. Culm-internodes terete, or elliptical in section; scaberulous. Lateral branches lacking. Leaves mostly basal. Leaf-sheaths mostly shorter than adjacent culm internode; keeled; scaberulous. Ligule an eciliate membrane; 1–2 mm long; truncate. Leaf-blades 8–12 cm long; 3 mm wide; stiff; glaucous. Leaf-blade surface scaberulous; rough adaxially. Leaf-blade margins scaberulous. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate, or ovate; 7–14 cm long; 3–6 cm wide. Panicle axis scabrous. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with diminished florets at the apex. Spikelets lanceolate, or elliptic; laterally compressed; 4.5–5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus sparsely hairy.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate, or ovate; 3–3.5 mm long; 1 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume primary vein scabrous. Lower glume apex acute. Upper glume lanceolate, or ovate; 3–3.5 mm long; 0.8 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acute.

FLORETS Fertile lemma oblong, or ovate; 4 mm long; membranous; keeled; 5 -veined. Lemma midvein ciliolate; hairy below. Lemma surface scaberulous. Lemma margins ciliolate; hairy below. Lemma apex obtuse. Palea 1 length of lemma. Palea keels ciliolate.

FLOWER Lodicules 2; membranous. Anthers 3; 2 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION South America: southern South America.

NOTES Poeae. Hackel 2004.

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