Cyperus. | CLYI. CYPERACEH (CLARKE). 377 
long, setaceous. Spikelets 10-20, hardly as long as the little finger- 
nail, linear, narrow, spreading, about 20-flowered. Glumes lax, linear’, 
obtuse, purple, green on the back, aristate ; the arista as long as the 
valve, recurved like a hook, green. 
Upper Guinea. Sierra Leone, from the herbarium of Thouin or of Lamarck 
(ex Vahl). Probably collected by Afzelius or Smeathman, 
Very distinct from C. aristatus. 
5. MARISCUS, Gertn. Fruct. i. 11, t. 2 (excl. Bobartella). 
Spikelet 1~20-flowered, deciduous in one piece by a disarticulation 
above the two lowest empty glumes; the fertile glumes long-persistent, 
retaining the nut by the aid of the two wings of the rhachilla. Other- 
wise as Cyperus.—Cyperus, Benth. et Hook. f. Gen. Pl. iii. 1043 
partly. 
Species 180, in all warm and warm-temperate regions; in the New World 
several species extend to cool-temperate regions. 
As subsidiary aids to the rapid discrimination of Cyperus from Mariseus it 
should be noted ( 1) All the leafless examples must be Cyperus; (2) All the examples 
with less than 5 nuts to the spikelet must be Mariscus ; (3) All the examples with 
the rhachilla of the spikelet wingless must be Cyperus. (Gertner’s first species of 
Mariscus, is Subgenus Bobartella, is a Rynchospora.) 
* BULBOCAULIS. Base of the stem thickened by the turgid membranous 
coloured (often-torn) sheaths. : 
Spikelets ripening generally more than 1 nut (usually 
2-4, sometimes 6-10 nuts). 
{Inflorescence congested. 
Spikes usually condensed into 1 ovoid head (but 
digitate in M. dregeanus, var., and in 
M. coloratus, var.). 
Nuts usually 2-4 to the spikelet. 
Spikelets straw-coloured or yellow. 
Stolons numerous, slender, with red-brown 
scales . : 3 : “ . 3. UM, diurensis. 
Stolons none seen. 
Glumes with 9-17 strong ribs, 
Spikelets 2-6-nutted. 
Spikelets obtuse , : ° 
Spikelets acute . i ; : 
Spikelets 2-l-nutted; glumes re- 
mote < : : 
Glumes with few obscure ribs. . 
Spikelets chestnut-red_.. 2 : ° 
Nuts usually 6—8-10 to the spikelet. 
Spikelets straw-coloured ; glumes obtuse 
Spikelets chestnut-red ; glumes acuminate, : 
acute : 8. M. somaliensis. 
Spikes manifestly digitate. (Sce also M. dre- 
geanus, var., M. coloratus, var.) 
Glabrous. 
Spikes green variegated with red ' , 9. M. Schimper. 
Spikes blackish-green “ : : . 10. UU. inflatus. 
1. M. dregeanus. 
2. M. coloratus. 
. M. remotus, 
. MU. firmipes. 
M. maritimus, 
Se 
. WM. macropus. 
