Poa umbrosa

HABIT Perennial; caespitose. Culms geniculately ascending; 45–60 cm long. Ligule an eciliate membrane; 1–1.5 mm long. Leaf-blades 20–30 cm long; 2–3 mm wide; flaccid. Leaf-blade apex acute.

INFLORESCENCE Dioecious. Inflorescence a panicle.

Panicle open; linear; loose; 10–15 cm long. Primary panicle branches appressed, or ascending; 1–5 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 6–12 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 5–11 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus woolly.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 2–3 mm long; 0.66–0.9 length of upper glume; membranous; 1-keeled. Upper glume lanceolate; 3–3.5 mm long; 0.9–1 length of adjacent fertile lemma; membranous; 1-keeled.

FLORETS Fertile florets female. Fertile lemma lanceolate; 3–4 mm long; membranous; keeled; 5 -veined. Lemma margins eciliate. Lemma apex acuminate. Palea 1 length of lemma. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 1.5–2 mm long.

MALE Male inflorescence similar to female. Male spikelets resembling female.

DISTRIBUTION South America: Brazil and southern South America.

NOTES Poeae. WDC 2014.

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