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Descriptions

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

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

Ottochloa

HABIT Perennial. Culms geniculately ascending (1), or decumbent (1), or rambling (1); slender (1/1); 5–67.5–200 cm long; spongy (1), or firm (2); rooting from lower nodes. Lateral branches ample (1/1). Ligule an eciliate membrane (2), or a ciliolate membrane (1). Leaf-blades persistent (2), or deciduous at the ligule (1); linear (1), or lanceolate. Leaf-blade venation without cross veins (2), or with obscure cross veins (1).

INFLORESCENCE Inflorescence composed of racemes.

Racemes borne along a central axis; unilateral; bearing 4–6 fertile spikelets on each (1/1). Rhachis angular. Spikelet packing abaxial (1/1).

Spikelets solitary, or in pairs (1). Fertile spikelets pedicelled. Pedicels tip cupuliform (1/1).

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate (1), or oblong (2); dorsally compressed; 1.75–3.738–7.2 mm long; falling entire.

GLUMES Glumes shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.4–0.725–1 length of upper glume; membranous; without keels; 3 -veined. Lower glume surface without pits. Lower glume apex acute. Upper glume lanceolate (1), or ovate (2); 0.3–0.35–0.4 length of adjacent fertile lemma; membranous; with undifferentiated margins (2), or hyaline margins (1); without keels; 5 -veined. Upper glume apex acute.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate (1), or ovate (2); membranous; 5 -veined (1), or 7 -veined (2); obtuse (1), or acute (2). Fertile lemma elliptic (2), or ovate (1); chartaceous (1), or coriaceous (2); of similar consistency on margins (2), or much thinner on margins (1); without keel; wingless; 3 -veined (1), or 5 -veined (2). Lemma lateral veins obscure (1/1). Lemma surface smooth (2), or granulose (1); unwrinkled; without grooves. Lemma margins involute; eciliate (2), or ciliolate (1). Lemma apex acute. Palea not rolled (1), or involute (2); 1 length of lemma; chartaceous (1), or coriaceous (2); 2 -veined.

FLOWER Anthers 3 (1/1).

DISTRIBUTION Africa (1), or Temperate Asia (1), or Tropical Asia (2), or Australasia (2).

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