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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Poa phillipsiana
HABIT Perennial; caespitose; clumped densely. Butt sheaths herbaceous; purple. Basal innovations intravaginal. Culms 40–80 cm long; 1–2 -noded. Culm-internodes terete; smooth, or scaberulous. Culm-nodes glabrous. Lateral branches lacking. Leaf-sheaths antrorsely scabrous; glabrous on surface. Ligule a ciliolate membrane; 0.5–0.75 mm long; scaberulous on abaxial surface; truncate. Leaf-blades erect; aciculate; involute; 7–25 cm long; 0.5–0.75 mm wide; stiff; glaucous. Leaf-blade surface scabrous; glabrous.
INFLORESCENCE Inflorescence a panicle. Peduncle antrorsely scabrous above.
Panicle open; elliptic; 6–20 cm long. Primary panicle branches spreading; 2–5 -nate; 5–10 cm long. Panicle branches scabrous.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels scabrous.
FERTILE SPIKELETS Spikelets comprising 3–5 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 5–8 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes smooth. Floret callus glabrous, or woolly.
GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume oblong; 0.9 length of upper glume; membranous; 1-keeled; 1–3 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent, or obscure. Lower glume surface smooth, or asperulous; rough above. Lower glume apex acute. Upper glume oblong; membranous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume surface smooth, or asperulous; pubescent. Upper glume apex acute.
FLORETS Fertile lemma oblong; elliptic in profile; 2.5–3.25 mm long; membranous; keeled; 5 -veined. Lemma midvein ciliate; hairy below. Lemma surface pubescent; hairy below; hairy on back, or on veins. Lemma margins ciliate; hairy below. Lemma apex obtuse. Palea 0.9 length of lemma. Palea keels scabrous; ciliolate; adorned in the middle. Palea surface pubescent; hairy on back. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Lodicules 2; membranous. Anthers 3; 1.5–2 mm long; yellow, or purple.
FRUIT Caryopsis with adherent pericarp; ellipsoid. Hilum punctiform.
DISTRIBUTION Australasia: Australia.
NOTES Poeae. Vickery.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
