Scirpus. | CLVI. CYPERACEE (CLARKE). 447 
passing insensibly into the top of the ovary. Nut obovoid or oblong 
trigonous or biconvex, without a beak; style deciduous, or if persistent 
the base undistinguishable from the top of the nut.—Glabrous except 
that the glumes are minutely hairy or ciliate in a few species. Stems 
without nodes or leaves between the basal leaves and the inflorescence. 
Spikelets in a head (or 1 only), or in a corymb depressed into an 
apparent umbel. 
Species 136, spread throughout the world, The section Sylvatice, with nodes 
i leaves between the stem-base and inflorescence, is conspicuously absent from 
rica. 
: *“NEMUM.—Glumes persistent after the nut has fallen. Style linear with 2 
linear branches. Hypogynous bristles 0. Stem with 1-3 separate spikelets of a rich. 
red-brown. 
Spikelet 1; glumes glabrous 5 e : . 1, 8. spadiceus. 
Spikelets 3-1; glumes ciliate on the upper margin 2. S. angolensis. 
**TSOLEPIS.—Glumes deciduous. Style linear. Hypogynous bristles 0. Stem 
with 1 head of sessile spikes (except in S. cubensis), or branched with solitary spikes. 
See several species of subgenus Euscirpus in which the hypogynous bristles are 0. 
Also genus 12, Ficinia, . . 
Stem with nodes, leaves and branches weak . 3. S. fluitans. 
Stems with no nodes or leaves between the base and 
the inflorescence. 
Stem bearing 1 spikelet ; style 2-fid. 
Leaves 3-% the length of the stem - - 4 S, nervosus. 
Leaves O : - : . 5 SY, verrucosulus, 
Stem bearing 3-1 spikelets or 1 head of spike- 
lets ; style 3-fid. 
Stem slender, bearing 3-1 spikelets, and leaves. 
Nut smooth or dotted, without ribs . . 6. S. cernuus. 
Nut ribbed and transversely bavred .. . 7. S. setaceus. 
Stem stouter, leafless, with 1 head of many 
spikelets. 
Nut ribbed and transversely barred - . 8. S. costatus. 
Nut smooth without ribs ; dicecious . 9. S. diwcus. 
Heads of spikelets umbelled ; style 2-fid . . 10. 8. cubensis. 
*#**Euscrrpus.—Stems stouter than in subgenus Zsolepis (excepting S. cubensis), 
without nodes above the base. Style linear. Hypogynous bristles present in the 
majority of the species. 
Inflorescence in 1 head (except in S. supinus, 
var. 8). Leaves O, or in S. supinus short. 
Hypogynous bristles 0. Stem terete or nearly 
so. 
Nut strongly transversely wrinkled. Green 
leaves short : : : 5 . 11. 8S, supinus. 
Nut obscurely wrinkled or smooth. Leaves 0. 
Glumes in fruit incurved ° : . 12. S. articulatus. 
Glumes in fruit spreading : ; . 13. 8. quinquefarius. 
Hypogynous bristles 5-6. Leaves 0. Stem 
triquetrous . ° : : . . 14. S. mucronatus. 
Inflorescence corymbose subumbellate ; sometimes 
in S. maritimus reduced to 1 head. 
Hypogynous bristles 0; leavesO - 
Hypogynous bristles minutely retrorse-scabrid. 
. 16. S. corymbosus. 
