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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.
Anadelphia trichaeta
HABIT Annual; caespitose. Culms geniculately ascending; 30–60 cm long; 3–6 -noded. Leaf-sheaths pilose. Ligule an eciliate membrane; 3 mm long. Leaf-blades involute; 7–25 cm long; 0.5–3 mm wide. Leaf-blade surface pubescent; hairy abaxially. Leaf-blade apex acuminate.
INFLORESCENCE Synflorescence compound; linear; 10–25 cm long. Inflorescence comprising only a few spikelets; comprising 1 fertile spikelets; terminal and axillary; subtended by a spatheole; enclosed. Spatheole linear; 1.5–3 cm long; scarious.
Spikelets in threes. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 2 in the cluster. Pedicels filiform; 1–1.5 mm long; ciliate; with red hairs.
STERILE SPIKELETS Companion sterile spikelets represented by barren pedicels.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 5.5–7 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus cuneate; 1.5 mm long; pubescent; base pungent; attached obliquely. Spikelet callus hairs red.
GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume oblong; 1 length of spikelet; coriaceous; dark brown; without keels; 6–7 -veined. Lower glume lateral veins obscure. Lower glume apex dentate; 2 -fid; awned; 2 -awned. Lower glume awn 3–5 mm long. Upper glume oblong; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume apex entire; awned; 1 -awned. Upper glume awn 7–8 mm long.
FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; 3 mm long; hyaline; 0 -veined; without midvein; without lateral veins; ciliate on margins. Fertile lemma linear; 3–3.5 mm long; hyaline; without keel; 1 -veined. Lemma apex dentate; 2 -fid; incised 0.33–0.5 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 20–30 mm long overall; with twisted column. Column of lemma awn 20–27 mm long; glabrous. Palea absent or minute.
FLOWER Anthers 3; 1.5–2 mm long.
DISTRIBUTION Africa: west tropical.
NOTES Andropogoneae. FWTA.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
