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.

Holcolemma

HABIT Perennial. Culms geniculately ascending (1), or decumbent (2), or rambling (1); slender (2/2); 10–38.33–60 cm long. Ligule a ciliolate membrane. Leaf-blades firm (2), or flaccid (1).

INFLORESCENCE Inflorescence a panicle.

Panicle open (1), or contracted (2). Primary panicle branches sterile at the tips.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate (1), or elliptic (2); dorsally compressed; 2.5–3.083–4 mm long; falling entire.

GLUMES Glumes shorter than spikelet; thinner than fertile lemma. Lower glume oblate; not gibbous (2), or gibbous (1); hyaline (1), or membranous (2); without keels; 3 -veined (2), or 7 -veined (1). Lower glume lateral veins without ribs (2), or ribbed (1). Lower glume surface without pits. Lower glume apex obtuse (2), or acute (1). Upper glume oblong (1), or ovate (2); hyaline (1), or membranous (2); without keels; 3 -veined (2), or 4–5 -veined (1), or 11 -veined (1). Upper glume lateral veins without ribs (2), or ribbed (1). Upper glume apex obtuse.

FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret oblong (2), or ovate (1); membranous (2), or herbaceous (1); 5–6 -veined (1), or 7 -veined; sulcate; obtuse (1), or acute (2). Palea of lower sterile floret becoming indurate on keels at maturity; winged on keels. Fertile lemma elliptic (2), or ovate (1); not gibbous (2), or gibbous (1); indurate; without keel; wingless; 5 -veined (1/1). Lemma surface granulose; rugulose (1), or rugose (2); without grooves. Lemma margins involute. Lemma apex obtuse (1), or acute (2); muticous (2), or mucronate (1). Palea involute; indurate.

FLOWER Anthers 3.

FRUIT Caryopsis with adherent pericarp (1/1); ellipsoid (1/1); dorsally compressed (1/1). Embryo 0.5 length of caryopsis. Hilum punctiform (1/1).

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

Please cite this publication as detailed in How to Cite Version: 27th January 2014.