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Descriptions

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

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

Polypogon maritimus

HABIT Annual. Culms erect, or geniculately ascending; 10–30 cm long. Ligule an eciliate membrane. Leaf-blades 2–5 cm long; 2–4 mm wide. Leaf-blade surface scaberulous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle; subtended by an inflated leaf-sheath.

Panicle spiciform; linear, or oblong; 2–5 cm long; 1–1.5 cm wide.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong; 0.5–1 mm long.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets cuneate; laterally compressed; 2–2.5 mm long; falling entire; deciduous from the base. Spikelet callus square; base obtuse. Floret callus glabrous.

GLUMES Glumes similar; exceeding apex of florets; firmer than fertile lemma; shiny; gaping. Lower glume oblong; 2–2.5 mm long; 1 length of upper glume; membranous; much thinner above; purple; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous; rough below. Lower glume margins ciliate. Lower glume apex lobed; 2 -fid; awned; 1 -awned. Lower glume awn 3–7 mm long. Upper glume oblong; 2–2.5 mm long; 1.6–2 length of adjacent fertile lemma; membranous; purple; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume surface scabrous; rough below. Upper glume margins ciliate. Upper glume apex lobed; 2 -fid; awned; 1 -awned. Upper glume awn 3–7 mm long.

FLORETS Fertile lemma oblong; 1.25 mm long; membranous; without keel; 5 -veined. Lemma lateral veins extending close to apex. Lemma apex entire; truncate; muticous. Palea 1 length of lemma; hyaline; 2 -veined.

FLOWER Lodicules 2; membranous. Anthers 3.

FRUIT Caryopsis with adherent pericarp; obovoid; 1 mm long. Embryo 0.33 length of caryopsis.

DISTRIBUTION Europe: southwestern, southeastern, and eastern. Africa: north and Macaronesia. Asia-temperate: Siberia, Soviet Middle Asia, Caucasus, western Asia, Arabia, China, and Mongolia. Australasia: Australia. North America: north-central USA, southwest USA, and southeast USA. South America: southern South America.

NOTES Aveneae. Fl Iran.

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