Echinopogon P.Beauv.

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Morphology General Habit

Perennial. Rhizomes absent (2), or elongated (5). Culms erect (6), or geniculately ascending; 10-50.71-100 cm long. Lateral branches lacking (6/6). Ligule an eciliate membrane. Leaf-blades linear, or lanceolate (3); stiff (1), or firm (6). Leaf-blade apex muticous, or pungent (3).

Morphology Reproductive morphology Inflorescences

Inflorescence a panicle. Panicle spiciform (5), or capitate (5). Spikelets appressed (2/6), or ascending (2/6), or spreading (4/6); solitary. Fertile spikelets pedicelled. Pedicels oblong.

Morphology Reproductive morphology Inflorescences Spikelets

Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets linear (2), or lanceolate (3), or oblong (4); laterally compressed; 2.5-5.071-10 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus brief (4), or evident (3); pubescent (3/6), or bearded (3/6).

Fertile

Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets linear (2), or lanceolate (3), or oblong (4); laterally compressed; 2.5-5.071-10 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus brief (4), or evident (3); pubescent (3/6), or bearded (3/6).

Morphology Reproductive morphology Inflorescences Bracts Glume

Glumes persistent; reaching apex of florets (4), or exceeding apex of florets (3); thinner than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous (6), or chartaceous (1), or scarious (1); 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface glabrous (5), or puberulous (1), or pubescent (1). Lower glume apex obtuse (2), or acute (4), or acuminate (1), or attenuate (2). Upper glume lanceolate; 1-1.107-1.4 length of adjacent fertile lemma; membranous (6), or chartaceous (1), or scarious (1); 1-keeled; 1 -veined. Upper glume primary vein eciliate (3), or ciliolate (4), or ciliate (2). Upper glume surface glabrous (5), or puberulous (1), or pubescent (1). Upper glume apex obtuse (2), or acute (4), or acuminate (1), or attenuate (2).

Morphology Reproductive morphology Flowers Florets

Fertile lemma lanceolate (6), or elliptic (1), or oblong (2); cartilaginous; keeled; 5 -veined, or 6-7 -veined (6), or 8-9 -veined (1). Lemma surface glabrous (6), or hispidulous (1). Lemma apex entire (3), or dentate (6); 2 -fid (6/6); emarginate (1), or obtuse (1), or acute (6); mucronate (1), or awned (6); 1 -awned (3/6), or 3 -awned (4/6). Principal lemma awn apical (3), or from a sinus (6). Lateral lemma awns shorter than principal (4/4). Palea 1 length of lemma; 2 -veined. Palea keels smooth (6), or scaberulous (1), or scabrous (1); eciliate (3), or ciliolate (6).

Morphology Reproductive morphology Flowers

Anthers 3. Ovary glabrous (3/6), or pubescent on apex (4/6).

Morphology Reproductive morphology Fruits

Caryopsis with adherent pericarp; ellipsoid (1/3), or oblong (2/3). Hilum linear.

Distribution

Tropical Asia (2), or Australasia.