Scirpus.) CXLIII. CYPERACEX. 323 
Ihave a i Asa Gray and Boeckeler in NE Isolepis with Scirpus, for the 
sole character by w which they are distinguished, the meis of the bristles in the 
ormer, is variable in two or three species, and in other instances vea ap i 
closely allied that Beckeler has united them as vi nales In the great jer ad 
species however the charact ter is 80 constant and so frequently ees: ae by 
ence in inflorescence, g the two groups sf least as 
artificial sections. jw the other hand, Nees’ section or genus Oncostylis, retained by . 
Bockeler in Scirpus, a appears to me to be much more naturally refe y Gray 
alboa base of the m 
to Fimbristylis, of which it has the inflorescence, and the b 
although often long persistent on the nut, is s articulate with it, and often falls off 
from the perfectly ripe fruit. 
5 Scr. I. Is olepis.—No hypogynous bristles (except very rarely in 8. supinus). 
oll o or slender plants (except the last few spe cies). 
dg ES i in numerous dense heads, almost radical 
of grass-like filiform involucral bracts . . 1. S. humillimus. 
Spikelets 4 wlan Style-branches 2. Nut biconvex. z 
Stamens usually 3, 
Spikelet rej few-flowered, 1 to 2 lines long. 
Stem or filiform rues 2a enit sed 
rg 
3 
35 
E 
- 
qi 
HM 
s. 
HE 
PA ed . 
Bpikalot ie pale-brown, under 2 lines long, 3- to 
5-flowered . 4. S. lenticularis. 
"rbi me, 2 to 4 lines long, many- -Howered, Nut 
bicular, biconv iir ers centre only, the edge 
S thicke 5. S. crassiusculus. - 
pikelets solitary or ‘clas tered. 'Style-branches 2. N ut 
ressed 
vee. Stamens 2. Spikelet comp E 
Spikelet e ian ovate si ind 2 . 6. S. brizoides. 
Spikelets ser pera or rarely solitary, "narrow-oblong 
-. 7. S. cyperoides, 
Spikalete seit or cluster: small, 1 to 2 lines id 
or olay or ng, qu or gain ^ 
branches 3 rarel 
ently keeled. 
obevold a tae or 3-ribbed; 
dfe with longitudinal furrows, S pikelets 
N 1 to3 í 8. S. setaceus, 
ut very small, obtusely triquetrous ‘smooth. Spiko- 
lets 1 to 3 9. S. riparius. 
Nut Bonet ai triquetrous ' Spikelets solitary or 
. 10. S. cartilagineus. 
or 2, Spikelets clustered. Glumes 
St with | long recurved points. Nut very narrow . . ll. S. squarrosus. 
en 1. Spikelets usually chester, sometimes pro- 
us. Glumes broad. Nut acutely ini aster 12. S. inundatus. 
Sty Satai, above 2 lines ge oblong or 
3. 
cluster, Nuls o. « . M. S. sipinns. 
mee item agaa Spikelets 
in dense clusters, Nuts smooth . . . . . 15. S, artiedafus, — . 
