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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 clivicola

HABIT Perennial; caespitose. Butt sheaths herbaceous; pallid. Basal innovations intravaginal. Culms slender; 15–60 cm long; 1–2 -noded. Culm-internodes terete; smooth. Culm-nodes glabrous. Lateral branches lacking. Leaf-sheaths smooth, or scaberulous; glabrous on surface. Ligule a ciliolate membrane; 0.5–1.5 mm long; glabrous on abaxial surface, or scaberulous on abaxial surface; truncate. Leaf-blades filiform; involute; 3–15 cm long; 0.2–0.4 mm wide. Leaf-blade surface scaberulous; glabrous.

INFLORESCENCE Inflorescence a panicle. Peduncle smooth.

Panicle open; elliptic; effuse; 2–12 cm long. Primary panicle branches 2–5 -nate; sparsely divided. Panicle branches capillary; scaberulous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels scaberulous.

FERTILE SPIKELETS Spikelets comprising 2–7 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 4–8 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes smooth. Floret callus glabrous.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 0.9 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume primary vein scabrous. Lower glume surface smooth, or asperulous; rough above. Lower glume apex acute. Upper glume lanceolate; membranous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume surface smooth, or asperulous; rough above. Upper glume apex acute.

FLORETS Fertile lemma oblong; elliptic in profile; 3–4 mm long; membranous; keeled; 5 -veined. Lemma midvein without distinctive roughness, or scaberulous; eciliate, or ciliolate; hairy below. Lemma surface pubescent; hairy on veins. Lemma margins eciliate, or ciliolate; hairy at base. Lemma apex acute. Palea 0.9 length of lemma. Palea keels ciliolate; adorned above. Palea surface smooth, or scabrous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3; 1.5–2.5 mm long; yellow, or purple.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Australasia: Australia.

NOTES Poeae. Vickery.

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