330 
CYPERACE-iE. 
2. S. sylvaticus (L.) ; spikes in a large cymose very compound 
terminal panicle, general bracts several foliaceous, glumes obtuse 
with a minute apiculus, nut obovate obtusely trigonous. — E. B. 
919- St. 36. 8. — St. 2 — 3 feet high. Spikes very numerous, 
small, greenish, ovate. L. broad, flat. Stigmas 3. — S. radicans 
(Schk.), spikes all stalked, scions long and rooting, will probably 
be found. — Damp woods and banks. P. VII. 
ft Stem triangular ; panicle naked. 
3. S. trigonus (Roth) ; st. round below obtusely trigonous 
■upwards, spikes in a small cymose panicle, glumes ernarginate 
mucronate slightly punctate -scabrous and pilose fringed, nut "con- 
vex on the back smooth." — E. B. 1983. S. carinatus Sm. — St. 
2 — 4 feet high, convex between the angles, with 1 or 2 long 
sheaths at the base, the upper sheath in all my specimens ter- 
minates in a leaf of 3 or 4 in. long ; most authors describe the 
plant as leafless. Lower bract much longer than the panicle. 
Stigmas 2.— By rivers, near London and in Sussex. P. VI. 
VII. E. 
4. S. friqueter (L.) ; st. acutely triquetrous throughout, spikes 
in a small cymose panicle, glumes ernarginate mucronate glabrous 
fringed : lobes rounded obtuse, nut " roundish-obovate plano- 
convex smooth."— E. B. 1694. St. 36. 3.— St. 3 — 4 feet high, 
flat or concave between the angles, with 1 or 2 long sheaths at 
the base the upper one terminating in a very short broad trique- 
trous leaf. Lower bract long and rigid, resembling a prolonga- 
tion of the stem. Spikelets small, stalked and sessile. "Anth. 
with a short beardless point." Stigmas 2. — Muddy banks of the 
Thames near London ; and the Aran near Amberley, Sussex. 
P. VIII. 
5. S. pungens (Vahl) ; st. acutely triquetrous throughout, 
spikelets few sessile, glumes bifid mucronate smooth : lobes acute, 
nut roundish-obovate plano-convex smooth. — E. B. S. 2819. S. 
Rothii Hoppe in St. 36. 4. S. tenuifolius DC. S. triqueter /3. 
Sm. — St. from a few inches to 1| foot high, slender, with several 
sheaths at the base terminating in long narrow keeled leaves. 
Lower bract very long and rigid, resembling a prolongation of 
the stem. Spikelets large, ovate, obtuse, all sessile. Anth. with 
a subulate fringed point. Stigmas 2. — St. Ouen's Pond, Jersey. 
P. VI. VII. o. 
fft Stem terete. 
6. S. lacustris (L.) ; st. round, spikes in a terminal twice com- 
pound panicle, glumes ernarginate mucronate glabrous fringed, 
nut obtusely trigonous obovate, stigmas 3. — E. B. 666. St. 36. 1. 
— St. 4 — 6 feet high, naked, with 1 or 2 long sheaths at the base. 
Anth. bearded at the end. Panicle not lateral although the bract 
