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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 jeholensis

HABIT Perennial; caespitose; clumped densely. Culms geniculately ascending; 30–60 cm long. Culm-internodes distally glabrous. Leaf-sheaths open for most of their length; smooth. Ligule an eciliate membrane; 1 mm long; scaberulous on abaxial surface; obtuse. Leaf-blades convolute; 4–8.5 cm long; 2–3 mm wide; glaucous. Leaf-blade surface ribbed; grooved adaxially; scabrous; rough adaxially. Leaf-blade margins scaberulous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; effuse; 8–17.5 cm long; 7–13 cm wide. Primary panicle branches reflexed; 1–4 -nate; 3–7 cm long. Panicle branches scabrous; rough distally.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 3–4 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 5–6 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; shorter than spikelet. Lower glume lanceolate; 0.7–1.4 mm long; 0.5–0.66 length of upper glume; membranous; purple; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume margins ciliolate. Lower glume apex acute. Upper glume elliptic; 1.5–2.2 mm long; 0.66 length of adjacent fertile lemma; membranous; purple; without keels; 5 -veined. Upper glume surface smooth, or asperulous; rough on veins. Upper glume margins ciliolate. Upper glume apex obtuse, or acute.

FLORETS Fertile lemma elliptic; 2.5–3 mm long; membranous; much thinner above; without keel; 5 -veined. Lemma lateral veins obscure; stopping well short of apex. Lemma surface smooth, or scaberulous; rough above and on veins; puberulous; hairy below; hairy on veins. Lemma margins ciliolate; hairy above. Lemma apex obtuse. Palea 1 length of lemma; 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 1.4–1.8 mm long. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Asia-temperate: China.

NOTES Poeae. Kitagawa 1996.

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