Poa cabreriana

HABIT Perennial; caespitose. Rhizomes elongated. Culms erect, or geniculately ascending; 15–30 cm long. Culm-internodes terete. Lateral branches lacking. Ligule an eciliate membrane; 1.5–2.5 mm long. Leaf-blades conduplicate; 5–10 cm long; 1–1.5 mm wide.

INFLORESCENCE Inflorescence a panicle.

Panicle open; oblong, or ovate; 5–10 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2–5 fertile florets; with diminished florets at the apex. Spikelets oblong, or ovate; laterally compressed; 3–5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite; obscured by lemmas; smooth. Floret callus woolly.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 2–3 mm long; 0.8–1 length of upper glume; membranous; 1-keeled; 1–3 -veined. Lower glume primary vein scabrous. Lower glume surface asperulous. Lower glume apex acuminate. Upper glume elliptic, or ovate; 2.5–3 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume surface asperulous. Upper glume apex acuminate.

FLORETS Fertile lemma ovate; oblong in profile; 2.5–3 mm long; membranous; much thinner above; much thinner on margins; keeled; 5 -veined. Lemma midvein ciliolate; hairy below. Lemma lateral veins stopping well short of apex. Lemma surface puberulous; hairy below; hairy on back, or on veins. Lemma apex acute. Palea 1 length of lemma. Palea keels scabrous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION South America: southern South America.

NOTES Poeae. Anton 2000.

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