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.

Lophopogon

HABIT Annual (1), or perennial. Culms 8–22–45 cm long. Ligule a ciliate membrane.

INFLORESCENCE Inflorescence composed of racemes; exserted, or embraced at base by subtending leaf (1).

Racemes paired; appressed back to back; oblong. Rhachis fragile at the nodes; flattened. Rhachis internodes linear. Rhachis internode tip oblique.

Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster. Pedicels linear; tip rectangular.

STERILE SPIKELETS Basal sterile spikelets well-developed.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 4.15–5.075–6 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus base truncate; attached transversely.

GLUMES Glumes reaching apex of florets; firmer than fertile lemma. Lower glume cuneate; chartaceous; without keels; 7 -veined. Lower glume surface without pits; with transverse tufts of hair. Lower glume apex dentate; 3 -fid; truncate. Upper glume elliptic; membranous; without keels; 3 -veined (1), or 5–7 -veined (1). Upper glume surface glabrous (1), or pilose (1). Upper glume apex acute; awned; 1 -awned.

FLORETS Basal sterile florets male, or barren (1); with palea. Lemma of lower sterile floret elliptic; hyaline; 1 -veined; acute. Fertile florets bisexual, or female. Fertile lemma elliptic; hyaline; without keel; wingless; 3 -veined. Lemma surface unwrinkled; without grooves. Lemma apex lobed; 2 -fid; incised 0.25 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; geniculate. Palea hyaline.

FLOWER Lodicules absent. Anthers 2.

DISTRIBUTION Tropical Asia.

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