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Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Puccinellia roborovskyi
HABIT Perennial; caespitose; clumped loosely. Basal innovations intravaginal. Culms 20–40 cm long. Leaf-sheaths open for most of their length; smooth; glabrous on surface. Ligule an eciliate membrane; 0.8–2 mm long. Leaf-blades convolute; 0.5–1.2 mm wide; glaucous. Leaf-blade surface smooth; glabrous.
INFLORESCENCE Inflorescence a panicle. Peduncle smooth, or scaberulous above.
Panicle open; ovate; effuse; 5–10 cm long; bearing few spikelets. Primary panicle branches 3–6 cm long; bearing 1–4 fertile spikelets on each lower branch. Panicle branches scabrous; rough distally.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 3–5 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 3.5–6 mm long; breaking up at maturity; disarticulating below each fertile floret.
GLUMES Glumes persistent; shorter than spikelet. Lower glume linear; membranous; much thinner above; much thinner on margins; without keels. Lower glume apex obtuse, or acute. Upper glume lanceolate; membranous; without keels. Upper glume apex obtuse, or acute.
FLORETS Fertile lemma lanceolate; 2.8–4.2 mm long; membranous; much thinner above; much thinner on margins; without keel; 5 -veined. Lemma lateral veins obscure; stopping well short of apex. Lemma surface pilose; hairy at base. Lemma apex acute. Palea 1 length of lemma; 2 -veined. Palea keels scabrous; eciliate, or ciliolate; adorned with hairs above. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Anthers 3; 1–1.3 mm long. Ovary glabrous.
FRUIT Caryopsis with adherent pericarp. Hilum punctiform.
DISTRIBUTION Asia-temperate: China.
NOTES Poeae. Pl Cent Asia 1996.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.