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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Sesleria heufleriana
HABIT Perennial; caespitose. Culms erect; 30–70 cm long. Lateral branches lacking. Leaf-sheaths tubular for much of their length; glabrous on surface. Ligule an eciliate membrane; 0.2–0.4 mm long. Leaf-blades conduplicate, or convolute; 20–35 cm long; 2–3(–7) mm wide; 0.8–5.5 cm long at summit of culm; pruinose. Leaf-blade apex acute, or acuminate.
INFLORESCENCE Inflorescence a panicle. Peduncle tipped by a glumaceous appendage (treated as sterile spikelets).
Panicle capitate; oblong, or ovate; 1–3 cm long; 0.7–1.1 cm wide. Primary panicle branches accrescent to a central axis; with evident branchlets on axis, or with lateral stumps on axis.
Spikelets solitary. Fertile spikelets pedicelled.
STERILE SPIKELETS Basal sterile spikelets represented by a single scale; 2 in number. Basal sterile spikelet glumes membranous.
FERTILE SPIKELETS Spikelets comprising 3 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 3–5 mm long; breaking up at maturity; disarticulating below each fertile floret.
GLUMES Glumes persistent; similar; shorter than spikelet, or reaching apex of florets. Lower glume lanceolate; 3.5–4.5 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume margins ciliate. Lower glume apex acute; awned; 1 -awned. Lower glume awn 0.5–2.5 mm long. Upper glume lanceolate; 3.5–4.5 mm long; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume margins ciliate. Upper glume apex acute; awned; 1 -awned. Upper glume awn 0.5–2.5 mm long.
FLORETS Fertile lemma ovate; 3–4 mm long; membranous; without keel; 3–5 -veined. Lemma surface pubescent. Lemma hairs 0.1–0.25 mm long. Lemma apex dentate; 5 -fid; awned; 5 -awned. Principal lemma awn 1–3.5 mm long overall. Palea 3–5 mm long; 2 -veined. Palea keels ciliolate. Palea surface pubescent. Palea apex awned; awns 0.2–1.5 mm long.
FLOWER Anthers 3. Stigmas 2; terminally exserted; pubescent. Ovary pubescent on apex.
FRUIT Caryopsis with adherent pericarp; hairy at apex. Hilum elliptic.
DISTRIBUTION Europe: central, southeastern, and eastern. Asia-temperate: Caucasus.
NOTES Poeae. Deyl 1994.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
