Flora of the Hawaiian Islands
Monocotyledon Literature for Fimbristylis dichotoma
Wagner et al., 1990, 1999.
   Cyperaceae -- The Sedge Family Bibliography
      Fimbristylis dichotoma
General Information
DistributionWidespread in tropical and subtropical areas worldwide.In the Hawaiian Islands, indigenous to Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Hawai`i.

Cyperaceae - Fimbristylis dichotoma

Click here for detailed USGS map by Jonathan Price
Short-lived, perennial herb with short rhizomes; culms tufted, trigonous, 10‒70 cm tall, 0.5‒1.5 mm in diameter.
Leaves few per culm; blade green, glaucous, flat or margin weakly incurved, linear, shorter than the culm, glabrous or sparsely pilose, apex blunt; sheath glabrous or pilose, ventrally reddish brown or pale brown; ligule a fringe of hairs.
Inflorescences lax to dense, simple, compound, or decompound, 2‒10 cm long, 1‒5 cm wide, bearing numerous spikelets, rays 2‒5, 1‒6 cm long; involucral bracts 2‒5, proximal ones leafy, usually longer than the inflorescence. Spikelets solitary or in clusters of 2‒3, brown to somewhat reddish brown, ovoid to ovoid-ellipsoid, 4‒8 mm long, 2.5‒3 mm wide, acute; glumes yellow, tinged brown, thin, chartaceous, broadly ovate, 2‒3 mm long, weakly fewveined on both sides of the green keel, contracted to an often mucronulate apex; style 2‒2.5 mm long, strongly flattened, margin conspicuously fimbriate, dilated at base, stigmas 2.
Achenes yellow to white, broadly obovoid, biconvex, 0.8‒1.2 mm long, conspicuously cancellate with 5‒8 rows of transversely rectangular cells, apex rounded to apiculate, base short stipitate.
2n = 10, 12, 20, 30.