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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.
Apocopis courtallumensis
HABIT Annual. Culms erect; 25–50 cm long. Leaf-sheaths striately veined; pilose; with tubercle-based hairs. Ligule an eciliate membrane; 1.5–2 mm long. Leaf-blades linear, or lanceolate; 1–10 cm long; 3–6 mm wide. Leaf-blade midrib keeled beneath. Leaf-blade surface scabrous; pilose; densely hairy; hairy on both sides; with tubercle-based hairs. Leaf-blade margins scabrous. Leaf-blade apex acute, or acuminate.
INFLORESCENCE Inflorescence composed of racemes. Peduncle glabrous.
Racemes 2; paired; 2–4 cm long. Rhachis fragile at the nodes; subterete; ciliate on margins. Rhachis hairs tawny; 1–2 mm long. Rhachis internodes linear; 2 mm long.
Spikelets appressed; in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels adnate at the base to lower glume of sessile spikelet; linear; 2.5 mm long; ciliate; with tawny hairs; with 2 mm long 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 oblong; dorsally compressed; 5 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base obtuse; attached transversely.
GLUMES Glumes dissimilar; reaching apex of florets; firmer than fertile lemma. Lower glume obovate; 4.5–5 mm long; 0.9–1 length of spikelet; coriaceous; dark brown; without keels; 7 -veined. Lower glume primary vein falling short of apex. Lower glume lateral veins all falling short of apex, or with some extending to apex. Lower glume apex emarginate. Upper glume oblong; 1 length of spikelet; chartaceous; light brown; 3 -veined. Upper glume surface pubescent. Upper glume apex truncate.
FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret lanceolate; 4.75 mm long; hyaline; 0 -veined; without midvein; without lateral veins; erose. Fertile lemma lanceolate, or oblong; 4.5 mm long; chartaceous; without keel; 1 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 18–20 mm long overall; with twisted column. Column of lemma awn 8 mm long; pubescent. Palea tightly convolute around flower; hyaline; 0 -veined; without keels.
FLOWER Lodicules absent. Anthers 2; 2.5–3.5 mm long.
DISTRIBUTION Asia-tropical: India.
NOTES Andropogoneae. Bor 1992.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
