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Descriptions

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

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

Potamophila

HABIT Perennial. Rhizomes elongated. Culms 30–150 cm long. Ligule an eciliate membrane.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted.

Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels filiform; tip cupuliform.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or oblong; laterally compressed; 3–5.5 mm long; falling entire.

GLUMES Glumes both absent or obscure.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret ovate; membranous; 0 -veined; acute. Fertile lemma oblong; chartaceous; without keel; wingless; 5 -veined. Lemma lateral veins prominent. Lemma surface unwrinkled; without grooves. Lemma apex obtuse. Palea 1 length of lemma; chartaceous; 3 -veined; without keels.

FLOWER Lodicules 2. Anthers 6. Stigmas 2.

FRUIT Caryopsis with adherent pericarp; obovoid.

DISTRIBUTION Australasia.

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