488 
CVI. CYPERACEJE. 
[ Cyperus. 
* Flowers perfect. Spikelets 2-ranked. Perigynium 0. 
1. Cyperus. Spikelets many-flowered ; glumes keeled, mostly all fer- 
tile, equal. Bristles none. Style deciduous. 
2. ScHffiNus. Spikelets 1 — 4-flowered; lower glumes smaller, empty. 
Style deciduous. Bristles 3 — 5 (in British species). 
** Flowers perfect. Spikelets with the glumes imbricated on all sides. 
Perigynium 0. 
f Several of the lower glumes empty or smaller than the fertile ones. 
3. Cladium. Spikelets with 1 — 3 perfect flowers. Aehene with a fleshy 
or somewhat corky coat, pointed with the enlarged base of the 
style. Bristles 0. 
4. Khynchospora. Spikelets few-flowered. Aehene compressed, crowned 
with the persistent dilated base of the style. Bristles C — 12. 
ff Lowest (1 — 2) glumes empty or larger than the others, sometimes all 
fertile. 
f Bristles scarcely so long as the glumes, or wanting. 
5. Blysmus. Spikelets bracteate, alternate, forming a distichous or 
compressed spike. Achenes crowned with the persistent filiform 
style. 
6. Eleocharis. Spikelets solitary. Aehene crowned with the dilated 
persistent base of the style. Bristles 2 — G. 
7. Isolepis. Spikelets solitary or fascicled. Aehene pointed with the 
narrow base of the style (the remainder of which is deciduous), or 
pointless. Bristles 0. 
8. Scirpus. Spikelets solitary or fascicled. Athene pointed with the 
persistent narrow base of the style (the remainder of which is de- 
ciduous), or pointless. Bristles about six. 
JJ Bristles at length much longer than the glumes. 
9. Eriophorum. Bristles straight, at length silky. 
*** Flowers imperfect. 
10. Kobresia. Spikelets 1 — 2-flowered. Perigynium 0 (or of 1 or 2? 
distinct scales). 
11. Carex. Aehene enclosed within an urceolate perigynium. 
* Flowers perfect. Glumes of each spikelet imbricated in two 
opposite rows. Perigynium 0 . (Gen. 1 , 2.) 
1 . Cyperus Linn. Cyperus. Galingale. 
Spikelets many-flowered. Glumes keeled, imbricated in 2 
opposite rows, mostly all fertile, equal. Hypogynous bristles 0 . 
Style 2 — 3-cleft, deciduous ; its base not dilated nor jointed 
upon the germen. Aehene often tipped with the small base of 
the style. — Name: Kvirtipog of the Greeks, an appellation given 
to one of this genus, probably in allusion to the Cyprian god- 
dess, the roots being reputed aphrodisiac. 
