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.

Tarigidia

HABIT Annual (1), or perennial (1). Rhizomes absent (1), or short (1). Culms decumbent (1/1); 38–73.25–110 cm long; rooting from lower nodes (1/1). Ligule an eciliate membrane. Leaf-blades linear (1), or lanceolate (1); herbaceous (1), or chartaceous (1).

INFLORESCENCE Inflorescence composed of racemes.

Racemes borne along a central axis; not compacted (1), or in a multilateral false spike (1); appressed; linear (1), or oblong (1); unilateral. Rhachis wingless (1), or narrowly winged (1); angular (1/1). Spikelet packing crowded.

Spikelets solitary (1), or in pairs (1). Fertile spikelets sessile (1), or sessile and pedicelled (1).

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 4–4.5–5 mm long; falling entire.

GLUMES Glumes shorter than spikelet; thinner than fertile lemma. Lower glume linear, or lanceolate (1); 1 length of upper glume; membranous; without keels; 1 -veined, or 2–3 -veined (1). Lower glume lateral veins absent, or obscure (1). Lower glume surface without pits; glabrous, or pilose (1), or villous (1). Lower glume apex acuminate. Upper glume lanceolate; 0.66–0.705–0.75 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume surface pilose (1), or villous (1). Upper glume apex acute.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret elliptic (1), or ovate (1); membranous; 5–6 -veined (1), or 7 -veined; acute. Fertile lemma lanceolate (1), or ovate (1); cartilaginous; of similar consistency on margins (1), or much thinner on margins (1); without keel; wingless; 3 -veined (1/1). Lemma surface smooth (1), or striate (1); unwrinkled; without grooves. Lemma apex acute (1), or apiculate (1). Palea cartilaginous.

FLOWER Lodicules 2 (1/1); truncate (1/1). Anthers 3 (1/1). Ovary glabrous (1/1).

FRUIT Caryopsis with adherent pericarp (1/1); ellipsoid (1/1). Embryo 0.6 length of caryopsis. Hilum punctiform (1/1).

DISTRIBUTION Africa (1), or South America (1).

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