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Descriptions

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

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

Dimeria blatteri

HABIT Annual. Culms 30–60 cm long. Culm-nodes bearded. Leaf-sheaths pilose; with tubercle-based hairs. Ligule a ciliolate membrane; 1.5 mm long. Leaf-blades 7–15 cm long; 2–4 mm wide; flaccid. Leaf-blade midrib prominent beneath. Leaf-blade surface scaberulous; rough on both sides; pilose; hairy on both sides; with tubercle-based hairs. Leaf-blade margins scaberulous; tuberculate-ciliate. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 3–4; digitate; unilateral; 4–8 cm long. Rhachis subterete; glabrous on margins. Spikelet packing crowded; regular; 2 -rowed.

Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels cuneate; flattened; 0.25 mm long; villous; hairy at tip.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets linear; laterally compressed; compressed strongly; 8–12 mm long; falling entire. Spikelet callus oblong; 1.2 mm long; pubescent; base acute.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume linear; 6–8 mm long; 0.66–0.75 length of spikelet; coriaceous; much thinner on margins; 1-keeled. Lower glume surface pubescent; hairy below. Lower glume apex acute. Upper glume elliptic; 1 length of spikelet; coriaceous; with hyaline margins; without keels; winged on keel; winged near apex. Upper glume surface pilose; hairy at apex and below. Upper glume apex acute; awned; 1 -awned. Upper glume awn 1 mm long.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 6 mm long; hyaline; ciliate on margins. Fertile lemma elliptic; 8 mm long; hyaline; without keel; 1 -veined. Lemma apex dentate; 2 -fid; with lobes 2 mm long; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 28 mm long overall; with twisted column. Column of lemma awn 8 mm long; glabrous. Palea absent or minute.

FLOWER Anthers 2; 3.5 mm long.

DISTRIBUTION Asia-tropical: India.

NOTES Andropogoneae. Bor 1993.

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