North American CtjpcrdCfM, 355 
14. TRICHELOSTYLIS, Lestib. 
Scales mostly 4 — 8-ranked, carinate. Peiugynium 0. 
S L'YLE 3-cleft, bulbous at the base, deciduous below the bulb. 
Nut triangular. — Culms simple, leafy at the base, often flatten- 
ed; leaves mostly very narrow and channelled; spikes usually 
in terminal umbels or heads, rarely solitary. 
Trichelostylis, Lestib. ess. /am. Cyp. p. 40, no 48 ; N. a 
Eseiib. in WighCs contrib. p. 70, and in Linncta, 9, p. 290. 
Species of Fimbristylis, Vahl, R. Brown, 
Species of Scirpus, Linn. 
This genus includes all the species of Fimbristylis of Vahl 
which have a triangular nut and a 3-cleft style. Some of them 
are difficult to distinguish from Isolepis, except by a careful 
examination of the style, w^hich in Trichelostylis is swollen at 
the base, and separates entirely from the nut; while in Isolepis 
the style is nearly equal, or only furnished with an extremely 
minute tubercle which remains attached to the nut after the 
separation of the style. 
Trichelostylis mucronulatus. 
Culm compressed, somewhat ancipital; umbel decompound, 
divaricate ; involucre two-leaved ; spikes oblong-lanceolate, 
mostly pedicellate, acute ; scales ovate-lanceolate, about four- 
ranked, mucronate, the point a little spreading ; stamens 2 ; 
nut obtusely triangular, (white) very obtuse, tuberculate. 
T. geminata, N. ah Esenh. in Linnace, 9, p. 90. 
Fimbristylis autumnalis, Rcem. <^* Schitlt. syst. 2. p. 97, (in part.) 
Spreng. syst. 1. p. 201, (in part). 
Scirpus mucronulatus, Michx.! Ji. 1. p. 31; Ram. 4* Schult. syst. 2, 
p. 145. 
S. Michauxii, Pers. syn. 1. p. 68. 
S. autumnalis, Pursh! fl. I. p. 57 ; Elliott, sJc. 1. p. 82; Muhl..' gram. 
p. 37; Big.! Jl. Bost. ed. 2. p. 23; Gray! Gram. 4- Cyp. part 1. no. 85; 
BecTc, hot. p. 426 ; Darlingt. ! fi. Cest. ed. 2. p. 19. 
