Sporobolus tetragonus, , Bor, 1949

Senniappan, Arumugam, Murthy, Garimella Venkata Suryanarayana & Nair, Velukutty Jayachandran, 2018, Taxonomic notes and lectotypification of Sporobolus tetragonus Bor (Poaceae, Chloridoideae), Phytotaxa 371 (1), pp. 67-69 : 68

Key to Sporobolus tetragonus and related species

1. Inflorescence branches subwhorled in proximal nodes, whorled in distal nodes only; inflorescence branches glandular................2

- Inflorescence all, (at proximal as well as distal nodes) whorled; inflorescence branches eglandular...............................................3

2. Spikelets elliptic-lanceolate, 1–1.3 mm long; lower glume ovate, c. 0.3 mm long ............................................ S. coromandelianus

- Spikelets oblong-lanceolate, 1.5–1.8 mm long; lower glume lanceolate, c. 1 mm long.................................................... S. ioclados

3. Leaf surface glabrous; panicle up to 15 cm long, ovate; grain up to 0.7 mm long ......................................................... S. pulchellus

- Leaf surface rough; panicle up to 25 cm long, elliptic; grain up to 1mm long ............................................................... S. tetragonus