494 
cvi. cyperacejE. 
[ Scirpus . 
* Spihelets numerous. Stem terete. 
1. S. lacustris L. ( Lake C. or B .) ; spikelets in compound 
lateral umbels mostly shorter than the terete almost leafless 
stem, glumes notched mucronate smooth eiliate, anthers bearded 
at the end, style trifid, achene bluntly trigonous obovate shin- 
ing and polished. E. B. t. 666. 
Plentiful on the margins of lakes and ponds. If. 7,8. — Rhizome 
much creeping. Inflorescence truly lateral, near the extremity of the 
stalks, which are very variable in size, 2 — 8 feet high, and as thick 
as a finger at the base. Spikelets often almost sessile. Glumes brown, 
fringed. Achene obovate-triquetrous, with 6 bristles. 
2. S. Tabernoemontani Gmel. ( glaucous C .) ; spikelets in com- 
pound lateral umbels mostly shorter than the terete almost 
leafless stem, glumes notched mucronate rough with raised 
points eiliate, anthers glabrous at the end, style bifid, achene 
elliptical compressed (pale brown). S. glaucus Sm. : E. B. 
t. 2321. 
Rivers and ponds, also where the water is brackish. Very abundant 
on both sides of the Clyde between Bowling Bay and Glasgow. !(.. 
6 — 8. — United to the last by Mr. Bentham, who says that the 
“ characters are very inconstant, and that there are often 2-cleft and 
3-cleft styles in the same spikelet.” This we have not observed. 
** Spihelets numerous. Stem triangular towards the apex. Panicle 
naked, terminal, but often apparently lateral from the lower bractea 
being a mere continuation of the stem. Style bifid. Achene lenticular , 
compressed. $ 
3. S. carinatus Sm. (blunt-edged C .) ; stem terete below 
bluntly triangular upwards, its sheaths leafless or the uppermost 
one with a leaf, cyme terminal decompound, bracteas two 
unequal, spikelets oblong, glumes notched mucronate slightly 
rough with raised points eiliate, stigmas 2, aehenes smooth. 
E. B. t. 1983. S. trigonus Roth. S. Duvalii Hoppe. 
Banks of rivers, very rare. About London, and on the banks of 
the Arun, Sussex. If.. 7, 8. — Mr. Bentham says that this name is 
sometimes given to a variety of S. lacustris (our S. Tabernctmontani ) 
with the stems rather more triangular at the top, sometimes to a slight 
variety of S. triqueter : we have seen too few specimens to decide the 
point. 
4. S. triqueter L. (triangular C.) ; stem acutely triquetrous 
Straight at the point, its upper sheath with a short broad tri- 
quetrous leaf, spikelets ovate or oblong-ovate clustered lateral 
sessile and stalked naked, glumes notched mucronate smooth 
fringed their lobes rounded obtuse, stigmas 2, aehenes smooth. 
E. B. t. 1694. 
Muddy banks of the Thames, near London ; and the Arun, near 
