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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 qinghaiensis
HABIT Perennial; caespitose. Rhizomes absent, or short. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Basal innovations extravaginal and intravaginal. Culms erect; (5–)15–55 cm long; 1–3 -noded; with 0.25–0.5 of their length below uppermost node. Lateral branches lacking. Leaves mostly basal. Leaf-sheaths open for most of their length; with 0.5 of their length closed; 2–15 cm long; smooth, or scaberulous; glabrous on surface. Ligule an eciliate membrane; 2–4 mm long; acute. Leaf-blades flat, or conduplicate; 2–10 cm long; 2–3(–5) mm wide. Leaf-blade surface scabrous; rough abaxially, or on both sides; glabrous.
INFLORESCENCE Inflorescence a panicle.
Panicle open; ovate; 2–10 cm long; 1.5–6 cm wide. Primary panicle branches spreading, or reflexed; 2 -nate; 1–6 cm long; bearing 2–6 fertile spikelets on each lower branch. Panicle axis with lower internodes 0.4–2.1 cm long. Panicle branches scabrous.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 2–4 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 7–10 mm long; with hairs extending 5–10 mm beyond apex; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.5–1 mm long; smooth; glabrous. Floret callus glabrous.
GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 3.5–6 mm long; 0.9 length of upper glume; membranous; 1-keeled; 1–3 -veined. Lower glume primary vein smooth, or scaberulous. Lower glume lateral veins obscure. Lower glume apex acute. Upper glume lanceolate; 4–7 mm long; 0.9 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein smooth, or scaberulous. Upper glume apex acute.
FLORETS Fertile florets bisexual, or female. Fertile lemma ovate; elliptic in profile; 4–7.5 mm long; membranous; keeled; 5(–9) -veined. Lemma midvein scabrous. Lemma lateral veins distinct. Lemma surface scabrous; puberulous; hairy below; hairy on back, or on veins. Lemma apex acute. Palea keels scabrous; adorned above. Palea surface scabrous. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Anthers 3; 2–3 mm long.
CLEISTOGENES AND VIVIPARY Vegetative proliferation absent, or occurs.
DISTRIBUTION Asia-temperate: China.
NOTES Poeae. Fl China 2007.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
