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.

Indopoa

HABIT Annual. Culms geniculately ascending; 3–16 cm long. Ligule an eciliate membrane.

INFLORESCENCE Inflorescence composed of racemes.

Racemes single; unilateral; bearing few fertile spikelets; bearing 2–10 fertile spikelets on each. Rhachis angular. Spikelet packing broadside to rhachis; lax.

Spikelets ascending; solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 4–6 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 6–12 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite. Floret callus evident; pilose.

GLUMES Glumes persistent; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 0.5 length of upper glume; hyaline; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface without pits. Lower glume apex acute; mucronate. Upper glume lanceolate; 0.7–0.8 length of adjacent fertile lemma; hyaline; 1-keeled; 1 -veined. Upper glume apex acute; mucronate.

FLORETS Fertile lemma oblong; membranous; keeled; wingless; 3 -veined. Lemma surface unwrinkled; without grooves. Lemma apex lobed; 2 -fid; incised 0.25 of lemma length; awned; 3 -awned. Principal lemma awn from a sinus; geniculate. Lateral lemma awns shorter than principal. Palea 0.7 length of lemma; 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; fleshy. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp; linear; isodiametric; biconvex; apex fleshy. Embryo 0.2 length of caryopsis. Hilum punctiform.

DISTRIBUTION Tropical Asia.

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