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.

Kerriochloa siamensis

HABIT Perennial. Culms decumbent; 20–25 cm long. Ligule an eciliate membrane; 1 mm long. Leaf-blades lanceolate; 1.5–4 cm long; 2.5–4 mm wide.

INFLORESCENCE Inflorescence composed of racemes; subtended by a spatheole; enclosed. Spatheole linear; 5–10 cm long; herbaceous.

Racemes 1; single; 2.5–4 cm long. Rhachis fragile at the nodes; flattened; villous on margins. Rhachis hairs 2.5 mm long. Rhachis internodes cuneate; 3.5–4 mm long. Rhachis internode tip cupuliform.

Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels foliaceous; ciliate.

STERILE SPIKELETS Companion sterile spikelets represented by single glumes; lanceolate; 0.5–2 mm long; persistent.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 5–6 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus pubescent; base obtuse; inserted.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of spikelet; chartaceous; without keels; 5 -veined. Lower glume lateral veins ribbed. Lower glume surface villous; hairy below. Lower glume apex entire, or dentate; 2 -fid; obtuse. Upper glume ovate; chartaceous; 1-keeled; 3 -veined. Upper glume margins ciliate. Upper glume apex dentate; 2 -fid; awned; 1 -awned. Upper glume awn 4.5–6.5 mm long.

FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret elliptic; 4.5–5.5 mm long; membranous; 3 -veined; ciliolate on margins; obtuse. Fertile lemma oblong; 3–3.8 mm long; hyaline; without keel; 3 -veined. Lemma margins ciliolate; hairy above. Lemma apex lobed; 2 -fid; incised 0.3 of lemma length; awned. Principal lemma awn from a sinus; geniculate; 10–16 mm long overall; with twisted column. Column of lemma awn glabrous. Palea 0.8 length of lemma; hyaline; 2 -veined; without keels.

FLOWER Anthers 3; 0.8–2.5 mm long.

FRUIT Caryopsis with adherent pericarp; oblong; isodiametric; 2–2.3 mm long. Embryo 0.3 length of caryopsis. Hilum elliptic.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Andropogoneae. CEH.

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