Scirpas.] 



CLVI. CYPERACE.E (cLARKE). 



447 



3. S.fluitans. 



S. nervosum. 

 S. verrucosulv.s. 



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 SyUaticoe, with nodes, 

 and leaves between the stem-base and inflorescence, is conspicuously absent from 

 Africa. 



-Nemum.— Glumes persistent after the nut has fallen. Style linear with 2 

 linear branches. Hypogyuous bristles 0. Stem with 1-3 separate spikelets of a rich 

 red-brown. 



Spikelet 1 ; glumes glabrous . . . . \. S, spadiceus. 



Spikelets 3-1 ; glumes ciliate on the upper margin 2. S. angolensis. 



**IsOLEPis. — Glumes deciduous. Style linear. Hypogynous bristles 0. Stem 



with 1 head of sessile spikes (except in 5. cuhensis), or branched with solitary spikes. 



See several species of subgenus Euscirpus in which the hypogynous bristjes are 0. 



Also genus 12, Ficinia. 



Stem with node?, leaves and branches weak 

 Stems with no nodes or leaves between the base and 

 the inflorescence. 

 Stem bearing 1 spikelet ; style 2-fid. 



Leaves ^-§ the length of the stem . . - 



Leaves ..... ^ 



Stem bearing 3-1 spikelets or 1 head of spike- 

 lets ; style 3-fid. 

 Stem slender, bearing 3-1 spikelets, and leaves. 

 Nut smootli or dotted, without ribs . 

 Nut ribbed and transversely barred . 

 Stem stouter, leafless, with 1 head of many 

 spikelets. 

 Nut ribbed and ti-ansversely barred - 

 Nut smooth without ribs ; dicecious 

 Heads of spikelets umbelled; style 2-fid . 



***EusciBPUS. — Stems stouter than in subgenus Isolepis (excepting S. cnbensis), 

 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. 3)- Leaves 0, or in S. supinus short. 



Hypogynous bristles 0. Stem terete or nearly 



so. 



Nut strongly transversely wrinkled. Green 



leaves short ..... 



Nut obscurely wrinkled or smooth. Leaves 0. 

 Glumes in fruit incurved 

 Glumes in fruit spreading 

 Hypogynous bristles 5-6. Leaves 0. Stem 

 triquetrous ...... 



Inflorescence corymbose snburabellate ; sometimes 

 in S. maritimus reduced to 1 head. 

 Hypogynous bristles 0; leaves 

 Hypog)'nons bristles minutely retrorse-scabrid. 



6. S. cermcus. 



7. S. setaceus 



8. S. costatus. 



9. S. dicecus. 

 10. S. cuhensis. 



11. S. supinus. 



12. S. articulntus. 



13. S. quinquefarius. 



14. S. mucronaius. 



16. S. corymhosus. 



