Tripogon jacquemontii

HABIT Perennial; caespitose. Culms erect; 20–90 cm long. Culm-nodes glabrous. Leaf-sheaths 3–6.5 cm long; keeled; striately veined; glabrous on surface. Ligule a ciliate membrane. Leaf-blades filiform; involute; 5–10 cm long; 1–2.5 mm wide; stiff; glaucous. Leaf-blade surface glabrous. Leaf-blade apex acute.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; straight, or arcuate; unilateral; 5–25 cm long. Rhachis flattened. Spikelet packing broadside to rhachis; regular; 2 -rowed.

Spikelets appressed; solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 8–36 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 7.5–35 mm long; 2–2.5 mm wide; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; asymmetrical; 2.5 mm long; 0.5 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex with a unilateral tooth; mucronate. Upper glume oblong; 4–5 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex truncate; mucronate.

FLORETS Fertile lemma ovate; 4 mm long; membranous; without keel; 3 -veined. Lemma lateral veins excurrent. Lemma apex lobed; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; 1.5–2 mm long overall. Palea 1 length of lemma; 2 -veined. Palea keels scaberulous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: India.

NOTES Eragrostideae. Fl Assam 1993.

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