Puccinellia shuanghuensis

HABIT Perennial; caespitose. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Culms erect; 8 cm long. Leaf-sheaths open for most of their length. Ligule an eciliate membrane. Leaf-blades filiform; convolute; 2 cm long; 1 mm wide. Leaf-blade surface scaberulous; rough adaxially. Leaf-blade apex obtuse.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; oblong; 1–2 cm long; 1 cm wide. Primary panicle branches ascending; bearing 1–2 fertile spikelets on each lower branch. Panicle branches smooth.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2(–3) fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; subacute to acute; 3–3.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.

GLUMES Glumes persistent; dissimilar; shorter than spikelet. Lower glume elliptic, or oblong; 1.2–1.5 mm long; 0.66 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume elliptic; 2 mm long; 0.66 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex obtuse.

FLORETS Fertile lemma elliptic, or oblong; 2.8–3 mm long; membranous; much thinner above; without keel; 3 -veined. Lemma midvein extending to apex. Lemma lateral veins obscure; stopping well short of apex. Lemma apex emarginate; mucronate. Palea 1 length of lemma; 2 -veined. Palea keels scabrous; adorned above. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 1.5 mm long. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Asia-temperate: China.

NOTES Poeae. Fl Xizang 1996.

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