GrassBase - The Online World Grass Flora


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

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

Phalaris minor

HABIT Annual; caespitose. Culms erect, or geniculately ascending; 20–100 cm long. Ligule an eciliate membrane; 2–7.5 mm long. Leaf-blades 5–10 cm long; 3–12 mm wide; flaccid. Leaf-blade margins scaberulous.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform, or capitate; oblong, or ovate; 1–6 cm long; 1–2 cm wide.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; compressed strongly; 4–6.5 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume elliptic; 4–6.5 mm long; 1 length of upper glume; chartaceous; 1-keeled; winged on keel; winged above; 3 -veined. Lower glume apex acute. Upper glume elliptic; 4–6.5 mm long; 1.5–1.6 length of adjacent fertile lemma; chartaceous; 1-keeled; winged on keel; winged above; 3 -veined. Upper glume apex acute.

FLORETS Basal sterile florets dissimilar; with vestigial lower floret; attached to and deciduous with the fertile. Lemma of upper sterile floret subulate; 1–1.8 mm long. Fertile lemma elliptic; laterally compressed; 2.7–4 mm long; cartilaginous; shiny; keeled; 5 -veined. Lemma surface pubescent. Lemma apex acute. Palea cartilaginous; 2 -veined; without keels. Palea surface pubescent.

FLOWER Anthers 3; 1–1.5 mm long. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; 2.3–2.5 mm long. Hilum linear.

DISTRIBUTION Europe: southwestern, southeastern, and eastern. Africa: north, Macaronesia, west tropical, northeast tropical, southern tropical, south, and middle Atlantic ocean. Asia-temperate: Soviet far east, Soviet Middle Asia, Caucasus, western Asia, Arabia, China, and eastern Asia. Asia-tropical: India and Malesia. Australasia: Australia and New Zealand. Pacific: southwestern and north-central. North America: Subarctic, western Canada, northwest USA, northeast USA, southwest USA, south-central USA, southeast USA, and Mexico. South America: Mesoamericana, western South America, Brazil, and southern South America. Antarctic: Subantarctic islands.

NOTES Aveneae. FZ.


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