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Descriptions

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

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

Vulpia fasciculata

HABIT Annual; culms solitary, or caespitose. Culms erect, or decumbent; 10–60 cm long; 2–3 -noded. Leaf-sheaths without keel; smooth; glabrous on surface. Ligule an eciliate membrane. Leaf-blades flat, or involute; 1–10 cm long; 1–3 mm wide; firm, or flaccid. Leaf-blade surface ribbed; pubescent; hairy adaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; oblong; secund; 2–12 cm long. Primary panicle branches appressed. Panicle branches angular; scaberulous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear; 3–7 mm long; scaberulous.

FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with diminished florets at the apex. Spikelets oblong, or cuneate; laterally compressed; 12–16 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes eventually visible between lemmas; smooth.

GLUMES Glumes persistent; dissimilar; shorter than spikelet. Lower glume ovate; 0.2–1.6 mm long; 0.02–0.1 length of upper glume; membranous; without keels; 0–1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 10–14 mm long; 0.9–1.2 length of adjacent fertile lemma; chartaceous; with membranous margins; 1-keeled; 3 -veined. Upper glume surface scabrous. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn 4–6 mm long.

FLORETS Fertile lemma lanceolate; 8–16 mm long; chartaceous; keeled; 3–5 -veined. Lemma surface scaberulous. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 10–25 mm long overall. Palea 0.6–0.7 length of lemma; 2 -veined. Palea keels scaberulous. Apical sterile florets 3–4 in number; barren; in a clump; linear; 2–4 mm long. Apical sterile lemmas awned; 1 -awned. Apical sterile lemma awns 6–16 mm long.

FLOWER Anthers 1–3; 0.8–1.5 mm long. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp; linear; hairy at apex. Hilum linear; 1 length of caryopsis.

DISTRIBUTION Europe: northern, southwestern, and southeastern. Africa: north and south. Asia-temperate: western Asia. Australasia: Australia.

NOTES Poeae. CEH.

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