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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 lindebergii

HABIT Perennial; caespitose. Rhizomes short. Culms geniculately ascending; 10–35 cm long. Culm-internodes terete; smooth; distally glabrous. Leaf-sheaths open for most of their length; with 0.33–0.5 of their length closed; longer than adjacent culm internode; without keel; striately veined; glabrous on surface. Ligule an eciliate membrane; 2 mm long; lacerate. Leaf-blades erect; flat, or conduplicate; 2.5–5 cm long; 1–2 mm wide. Leaf-blade surface glabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; linear, or lanceolate; dense; 5 cm long. Primary panicle branches appressed; 1–2 -nate; bearing 1–4 fertile spikelets on each lower branch. Panicle branches smooth; glabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 3–4 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes smooth.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume ovate; membranous; much thinner on margins; purple; 1-keeled; 3 -veined. Lower glume lateral veins obscure. Lower glume surface asperulous. Lower glume apex acute. Upper glume oblong; membranous; with hyaline margins; purple; 1-keeled; 3 -veined. Upper glume lateral veins obscure. Upper glume surface asperulous. Upper glume apex acute.

FLORETS Fertile lemma oblong, or ovate; 3–3.5 mm long; membranous; much thinner on margins; mid-green and purple; tipped with last colour; keeled; 5 -veined. Lemma midvein ciliolate; hairy below. Lemma margins ciliolate; hairy below. Lemma apex acute. Palea 3–4 mm long. Palea keels scabrous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

CLEISTOGENES AND VIVIPARY Vivipary absent, or occurs.

DISTRIBUTION Asia-temperate: Siberia.

NOTES Poeae. Lindeberg 1999.

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