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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 sugawarae
HABIT Perennial; caespitose. Butt sheaths pallid; persistent and investing base of culm. Basal innovations intravaginal. Culms 15–30 cm long. Culm-internodes terete; smooth. Lateral branches lacking. Leaf-sheaths 1–3 cm long; glabrous on surface. Ligule an eciliate membrane; 0.5 mm long; erose; truncate. Leaf-blades 2–5 cm long; 2–3 mm wide; 1 cm long at summit of culm; glaucous. Leaf-blade surface glabrous. Leaf-blade apex abruptly acute.
INFLORESCENCE Inflorescence a panicle.
Panicle open; ovate; nodding; 2 cm long. Primary panicle branches 1–2 -nate; 0.5–1 cm long; bearing 1–2 fertile spikelets on each lower branch. Panicle branches smooth.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 3–4 fertile florets; with diminished florets at the apex. Spikelets obovate; laterally compressed; 4–6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus woolly.
GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 2.5–3 mm long; 0.75 length of upper glume; membranous; much thinner on margins; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume ovate; 3.5–4 mm long; 0.75 length of adjacent fertile lemma; membranous; with hyaline margins; 1-keeled; 3 -veined. Upper glume lateral veins obscure. Upper glume apex obtuse.
FLORETS Fertile lemma ovate; 4–5 mm long; membranous; keeled; 5 -veined. Lemma midvein ciliate; hairy below. Lemma lateral veins obscure. Lemma margins ciliate; hairy below. Lemma apex erose; obtuse. Palea keels scaberulous. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Lodicules 2; membranous. Anthers 3; 2–2.5 mm long.
FRUIT Caryopsis with adherent pericarp. Hilum punctiform.
DISTRIBUTION Asia-temperate: Soviet far east.
NOTES Poeae. Ohwi 1995.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.