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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Trisetaria loeflingiana

HABIT Annual. Culms erect, or geniculately ascending; 9–25 cm long. Leaf-sheaths pubescent; with reflexed hairs. Ligule an eciliate membrane; 1.5–2 mm long; pubescent on abaxial surface. Leaf-blades 3–6.5 cm long; 0.9–1.7 mm wide. Leaf-blade surface pubescent; hairy on both sides. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; oblong; 1–3 cm long. Panicle branches pubescent.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels scaberulous.

FERTILE SPIKELETS Spikelets comprising 3 fertile florets; with a barren rhachilla extension. Spikelets cuneate; laterally compressed; 5–5.5(–6) mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite; villous; hairy all along but hairs longer above; with 1 mm long hairs.

GLUMES Glumes persistent; dissimilar; shorter than spikelet; thinner than fertile lemma; shiny; gaping. Lower glume linear; 3–4 mm long; 0.7–0.8 length of upper glume; hyaline; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 4–5 mm long; 1–1.25 length of adjacent fertile lemma; hyaline; 1-keeled; 3 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 4 mm long; membranous; shiny; keeled; 5 -veined. Lemma apex dentate; 2 -fid; awned; 3 -awned. Principal lemma awn dorsal; arising 0.5–0.66 way up back of lemma; geniculate; 10–12 mm long overall; with twisted column. Lateral lemma awns arising on apex of lobes; 2.5–3.5 mm long; shorter than principal. Palea gaping; linear; hyaline. Rhachilla extension 0.5 length of fertile floret; villous; with 0.5–1 mm long hairs.

FLOWER Anthers 3; 0.3–0.6 mm long. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; fusiform; laterally compressed; concavo-convex. Embryo 0.1–0.15 length of caryopsis. Hilum punctiform.

DISTRIBUTION Europe: central, southwestern, southeastern, and eastern. Africa: Macaronesia. Asia-temperate: Soviet Middle Asia, Caucasus, and western Asia. Asia-tropical: India.

NOTES Aveneae. Fl Turk.

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