Poa hubbardiana

HABIT Perennial; caespitose. Culms erect; 40–60 cm long; 2–3 -noded. Culm-internodes elliptical in section. Leaf-sheaths smooth; glabrous on surface. Ligule an eciliate membrane; 2–3 mm long; obtuse. Leaf-blades conduplicate; 20–40 cm long; 3–4 mm wide. Leaf-blade surface glabrous.

INFLORESCENCE Dioecious. Inflorescence a panicle.

Panicle contracted; linear; 8–12 cm long; 1.5 cm wide. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 5 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 10–15 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes smooth. Floret callus woolly.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 6–6.5 mm long; 0.8–0.9 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 7–7.5 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acuminate.

FLORETS Fertile florets female. Fertile lemma lanceolate; elliptic in profile; 7–8 mm long; 1.5 mm wide; membranous; keeled; 5 -veined. Lemma midvein pubescent; hairy below. Lemma surface pubescent; hairy on back. Lemma margins pubescent; hairy below. Lemma apex acute; mucronate. Palea 4.5 mm long. Palea keels woolly; adorned in the middle. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

MALE Male inflorescence similar to female. Male spikelets resembling female; 4 flowered; 7 mm long. Male spikelet lemma 5.5 mm long.

DISTRIBUTION South America: southern South America.

NOTES Poeae. Parodi 1995.

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