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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.
Tenaxia cachemyriana
HABIT Perennial; caespitose; clumped densely. Butt sheaths coriaceous; glabrous. Culms erect; 10–25 cm long. Culm-nodes glabrous. Lateral branches lacking. Ligule a fringe of hairs. Leaf-blades filiform; involute; 3–6 cm long; 0.5–1 mm wide. Leaf-blade surface ribbed; scaberulous; rough adaxially.
INFLORESCENCE Inflorescence a panicle.
Panicle contracted; oblong, or ovate; 1–3 cm long; bearing many spikelets, or few spikelets. Primary panicle branches indistinct the panicle almost racemose. Panicle branches glabrous, or pilose.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 10–12 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1.5 mm long. Floret callus evident; 0.5 mm long; bearded.
GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma; gaping. Lower glume lanceolate; 10 mm long; 0.8 length of upper glume; membranous; much thinner on margins; without keels; 3–5 -veined. Lower glume primary vein scaberulous. Lower glume apex acuminate. Upper glume lanceolate; 12 mm long; 2.5 length of adjacent fertile lemma; membranous; with hyaline margins; without keels; 5 -veined. Upper glume primary vein smooth, or scaberulous. Upper glume apex acuminate.
FLORETS Fertile lemma elliptic; 4.5 mm long; chartaceous; without keel; 5–7 -veined. Lemma surface pubescent; with a transverse row of hair tufts; bearing 2–4 hair tufts in all. Lemma margins ciliate. Lemma apex lobed; 2 -fid; with lobes 1 mm long; incised 0.25 of lemma length; awned; 3 -awned. Principal lemma awn from a sinus; geniculate; flat below; 15 mm long overall; with twisted column. Column of lemma awn 3 mm long. Lateral lemma awns arising on apex of lobes; 5.5 mm long; shorter than principal. Palea 1 length of lemma; 2 -veined. Palea keels scabrous. Palea surface pilose; hairy on back, or on flanks; hairy below. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Lodicules 2; cuneate; fleshy; ciliate. Anthers 3; 1.25–1.5 mm long.
FRUIT Caryopsis with adherent pericarp; obovoid; 1.5 mm long. Embryo 0.5 length of caryopsis. Hilum elliptic.
DISTRIBUTION Asia-temperate: western Asia and China. Asia-tropical: India.
NOTES Arundineae. Bor 1992.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
