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.

Trisetum laconicum

HABIT Perennial. Stolons present. Culms 50–60 cm long. Culm-internodes smooth; distally glabrous. Leaf-sheaths pubescent. Ligule an eciliate membrane. Leaf-blades 6–12 cm long; 2–4 mm wide. Leaf-blade surface pubescent; densely hairy.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate; 6–15 cm long; 2–3 cm wide.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 6–9 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pilose; with 2–2.5 mm long hairs. Floret callus pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma; shiny; gaping. Lower glume lanceolate; 0.66 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 0.9 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scaberulous. Upper glume apex acute.

FLORETS Fertile lemma oblong; 4.5–7.5 mm long; membranous; shiny; keeled; 5 -veined. Lemma surface asperulous. Lemma apex dentate; 2 -fid; awned; 3 -awned. Principal lemma awn dorsal; arising 0.5–0.6 way up back of lemma; curved; 5–10 mm long overall. Lateral lemma awns 0.5–1 mm long. Palea gaping; hyaline.

FLOWER Anthers 3; 2.7–4 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Europe: southeastern.

NOTES Aveneae. Fl Eur 1995.

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