GrassBase - The Online World Grass Flora

Descriptions

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

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

Porteresia

HABIT Perennial. Culms decumbent; 50–90 cm long; rooting from lower nodes. Ligule an eciliate membrane. Leaf-blades coriaceous. Leaf-blade margins cartilaginous.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels tip discoid.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 10–12 mm long; falling entire. Spikelet callus attached transversely.

GLUMES Glumes both absent or obscure.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret subulate. Fertile lemma oblong; coriaceous; keeled; wingless; 9 -veined. Lemma surface unwrinkled; without grooves. Lemma apex rostrate; awned; 1 -awned. Principal lemma awn pungent. Palea 1 length of lemma; coriaceous; 4 -veined.

FLOWER Lodicules 2. Anthers 6.

FRUIT Caryopsis with adherent pericarp; oblong; isodiametric; biconvex. Embryo 0.5 length of caryopsis. Hilum linear; 1 length of caryopsis.

DISTRIBUTION Tropical Asia.

Please cite this publication as detailed in How to Cite Version: 27th January 2014.