Glyphochloa

HABIT Annual. Culms erect (4/6), or geniculately ascending (5/6), or decumbent (1/6); slender (4/4); 7–23.95–90 cm long. Culm-internodes terete (1/2), or channelled (1/2). Culm-nodes constricted (1/2), or swollen (1/2). Lateral branches lacking (1/5), or sparse (4/5), or ample (1/5). Ligule an eciliate membrane. Leaf-blades firm (8), or flaccid (2).

INFLORESCENCE Inflorescence composed of racemes; terminal and axillary. Peduncle widened at apex (1/1).

Racemes single; unilateral. Rhachis fragile at the nodes; subcylindrical and excavated. Spikelet packing abaxial. Rhachis internodes oblong (1), or clavate (1), or cuneate (4), or inflated (2), or hour-glass shaped (2). Rhachis internode tip transverse (8), or oblique (2); crateriform.

Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels fused to internode.

STERILE SPIKELETS Companion sterile spikelets well-developed; deciduous with the fertile. Companion sterile spikelet glumes muticous (1), or awned.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic (3), or oblong (4), or ovate (4); dorsally compressed; 2–4.596–8 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus glabrous (7/8), or pilose (1/8); base truncate; with central peg; inserted.

GLUMES Glumes reaching apex of florets (1), or exceeding apex of florets (9); firmer than fertile lemma. Lower glume elliptic (3), or oblong (5), or ovate (3); indurate; 2-keeled; wingless (1), or winged on keel (9); 3–4 -veined (1/4), or 5 -veined (3/4), or 6 -veined (2/4), or 7–9 -veined (1/4). Lower glume lateral veins without ribs (7), or ribbed (3). Lower glume surface smooth (1), or asperulous (1), or with hooked spines (1), or rugose (6), or cancellate (1); without pits; glabrous (8), or puberulous (2), or pubescent (2), or pilose (1). Lower glume apex entire (5), or lobed (5); 2 -fid (5/5); acute (3/5), or caudate (2/5); muticous (2), or awned (9). Upper glume lanceolate (1), or elliptic (7), or oblong (1), or ovate (2); membranous; without keels (1/6), or 1-keeled (5/6); wingless (9), or winged on keel (1); 3 -veined (7/7). Upper glume surface glabrous (8), or puberulous (1), or pubescent (1). Upper glume apex acute (3/3), or acuminate (1/3).

FLORETS Basal sterile florets male (2), or barren (8); with palea (5), or without significant palea (5). Lemma of lower sterile floret lanceolate (2), or elliptic (1), or oblong (7), or ovate (1); hyaline; 0 -veined (1/4), or 2 -veined (3/4); obtuse (2/2). Fertile lemma lanceolate (1), or elliptic (5), or ovate (5); hyaline; without keel; wingless; 0 -veined (2/4), or 1 -veined (1/4), or 3 -veined (1/4). Lemma surface smooth (9), or scaberulous (1); unwrinkled; without grooves; glabrous (9), or pilose (1). Lemma apex obtuse (1/1). Palea 1 length of lemma; hyaline (1), or membranous (9); 2 -veined (1/1).

FLOWER Lodicules 2 (2/2); fleshy (1/1); truncate (1/1). Anthers 3 (5/5).

FRUIT Caryopsis with adherent pericarp (2/2); ellipsoid (2/2).

DISTRIBUTION Tropical Asia.

Please cite this publication as detailed in How to Cite Version: 16th November 2012.