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.

Pogonachne

HABIT Annual. Culms 60–100 cm long; rooting from lower nodes. Ligule an eciliate membrane.

INFLORESCENCE Synflorescence compound; scanty. Inflorescence composed of racemes; terminal and axillary; subtended by a spatheole. Spatheole linear; herbaceous.

Racemes single. Rhachis fragile at the nodes; flattened. Rhachis internodes linear.

Spikelets solitary, or in pairs. Fertile spikelets pedicelled; 1 in the cluster. Companion sterile spikelets sessile; 0–1 in the cluster. Pedicels cuneate; tip cupuliform.

STERILE SPIKELETS Companion sterile spikelets absent, or represented by single glumes; persistent.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; gibbous; 8.3–12 mm long; falling entire. Spikelet callus cuneate; bearded; base truncate.

GLUMES Glumes exceeding apex of florets; firmer than fertile lemma. Lower glume ovate; coriaceous; without keels; 7 -veined. Lower glume surface without pits; pilose. Lower glume apex acute. Upper glume ovate; gibbous; coriaceous; with membranous margins; without keels; 5 -veined. Upper glume surface pilose; with a dorsal tuft of hair. Upper glume apex acute.

FLORETS Basal sterile florets barren; with palea. Lemma of lower sterile floret lanceolate; hyaline; 3 -veined. Fertile lemma oblong; hyaline; without keel; wingless; 3 -veined. Lemma surface unwrinkled; without grooves. Lemma apex dentate; 2 -fid; obtuse; awned; 1 -awned. Principal lemma awn from a sinus; geniculate. Palea 0.8 length of lemma; 2 -veined; without keels.

FLOWER Lodicules 2. Anthers 3.

DISTRIBUTION Tropical Asia.

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