GrassBase - The Online World Grass Flora


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

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

Dimeria santapaui

HABIT Annual; caespitose. Culms erect; 5–15 cm long. Culm-nodes bearded. Leaf-sheaths without keel. Ligule an eciliate membrane. Leaf-blades 2–5 cm long; 1–2 mm wide. Leaf-blade surface glabrous. Leaf-blade apex abruptly acute.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; unilateral; 2 cm long; bearing few fertile spikelets; bearing 2–7 fertile spikelets on each. Rhachis flattened; glabrous on margins. Spikelet packing regular; 2 -rowed.

Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels cuneate; flattened.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; compressed strongly; 7 mm long; falling entire. Spikelet callus cuneate; 1.2–1.5 mm long; pubescent; base pungent.

GLUMES Glumes dissimilar; shorter than spikelet; firmer than fertile lemma. Lower glume elliptic; 3.5–4 mm long; 0.5 length of spikelet; coriaceous; 1-keeled. Lower glume apex acute. Upper glume lanceolate; 5 mm long; 0.7 length of spikelet; coriaceous; with hyaline margins; 1-keeled. Upper glume surface hispid; hairy at apex. Upper glume hairs 1–1.5 mm long. Upper glume apex acuminate.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret linear; 3 mm long; hyaline. Fertile lemma elliptic; 3 mm long; hyaline; without keel; 1 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 26–37 mm long overall; with twisted column. Column of lemma awn 2–8 mm long; glabrous. Palea absent or minute.

FLOWER Anthers 2.

DISTRIBUTION Asia-tropical: India.

NOTES Andropogoneae. Almeida 1994.

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