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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Poa induta

HABIT Perennial; caespitose; clumped densely. Butt sheaths herbaceous; pallid. Basal innovations intravaginal. Culms 50–90 cm long; 1–2 -noded. Culm-internodes terete; scaberulous; distally glabrous, or pubescent. Culm-nodes pubescent. Lateral branches lacking. Leaf-sheaths smooth; pilose. Ligule a ciliolate membrane; 1 mm long; pubescent on abaxial surface; truncate, or obtuse. Leaf-blades filiform; involute; 10–25 cm long; 0.7–0.8 mm wide. Leaf-blade surface pilose. Leaf-blade apex abruptly acute.

INFLORESCENCE Inflorescence a panicle. Peduncle smooth.

Panicle open; lanceolate, or pyramidal; 4–18 cm long. Primary panicle branches 2–6 -nate. Panicle branches capillary; scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels scabrous.

FERTILE SPIKELETS Spikelets comprising 2–7 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; pubescent. 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. Lower glume apex acute. Upper glume oblong; 0.66–0.8 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume surface smooth, or asperulous. Upper glume apex acute.

FLORETS Fertile lemma oblong; elliptic in profile; 2.2–2.8 mm long; membranous; keeled; 5 -veined. Lemma midvein ciliate. Lemma surface pubescent; hairy below; hairy on back, or on veins. Lemma margins ciliate; hairy at base. Lemma apex obtuse. Palea 0.9 length of lemma. Palea keels ciliolate; adorned above. Palea surface pubescent. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3; 1.3–1.5 mm long; yellow, or purple.

FRUIT Caryopsis with adherent pericarp; oblong. Hilum punctiform.

DISTRIBUTION Australasia: Australia.

NOTES Poeae. Vickery.

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