Flora of the Hawaiian Islands
Monocotyledon Literature for Sporobolus indicus
Wagner et al., 1990, 1999.
   Poaceae -- The Grass Family Bibliography
      Sporobolus indicus

Common name(s): dropseed, smutgrass, West Indian dropseed
General Information
DistributionNative to the Neotropics, now widely naturalized in tropical regions.In the Hawaiian Islands, naturalized on Midway, Kaua`i, O`ahu, Lana`i, Maui, Hawai`i.

Perennials; culms densely tufted, erect, 5-10 dm tall, unbranched, glabrous.
Sheaths glabrous except for the ciliolate upper margin; ligule a minute ciliolate fringe, 0.1-0.3 mm long; blades 13-35 cm long, 3-5 mm wide, flat, sparsely pilose near base, otherwise glabrous.
Panicles solitary, terminal, spike-like, cylindrical, 15-33 cm long, usually less than 1 cm in diameter, branches 1-4 cm long, strongly ascending, appressed; spikelets grayish, numerous, short-pedicellate, laterally compressed, 1.5-2 mm long, usually not disarticulating; glumes unequal, first glume rounded, 0.5-1 mm long, nerveless, apex erose, second glume ovate, 0.9-1.5 mm long, faintly 1-nerved, apex acute to rounded, erose; lemma ovate, 2.1-2.5 mm long, faintly 1-nerved, glabrous, apex acute; palea membranous, 1.8-2 mm long, glabrous, nerveless, apex rounded to obtuse, slightly creased.
Fruit brown, oblong-cuboid, truncate, glistening.
2n = 18, 24, 36, 40, 48