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Descriptions

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

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

Chloris pumilio

HABIT Annual; caespitose. Culms 60–90 cm long; without nodal roots, or rooting from lower nodes. Leaf-sheaths glabrous on surface. Ligule a ciliate membrane. Leaf-blades 7–12 cm long; 3 mm wide. Leaf-blade surface scaberulous.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 4–12; digitate; erect, or ascending; unilateral; 4–8 cm long. Rhachis subterete. Spikelet packing broadside to rhachis; regular.

Spikelets solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1–2 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 3.7–6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded; obtuse.

GLUMES Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma; gaping. Lower glume lanceolate; 1.5–2.5 mm long; 0.5–0.6 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 2.5–5 mm long; 0.66–0.8 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume apex acute; mucronate.

FLORETS Fertile lemma lanceolate, or elliptic; laterally compressed; 3.7–6 mm long; cartilaginous; keeled; 3 -veined. Lemma surface scabrous. Lemma margins ciliate; hairy all along, or above. Lemma hairs 1–2 mm long. Lemma apex lobed; 2 -fid; incised 0.33 of lemma length; awned; 3 -awned. Principal lemma awn from a sinus; 7–16 mm long overall. Lateral lemma awns arising on apex of lobes; 3–7 mm long; shorter than principal. Apical sterile florets 1 in number; barren; oblong; 1.3–4 mm long. Apical sterile lemmas lobed; 2 -fid; awned; 3 -awned. Apical sterile lemma awns 1–15 mm long; 3 per spikelet in number.

FLOWER Lodicules 2; cuneate; fleshy. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp; ellipsoid; dorsally compressed; trigonous; 1.2–3.3 mm long.

DISTRIBUTION Asia-tropical: Malesia. Australasia: Australia.

NOTES Cynodonteae. Anderson.

ADDITIONAL CHARACTERS Sterile lemma bilobed to middle.

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