Cyperus .] 
CYPERACEvE. 
413 
22. C- pennatus, Lam. ; Kunth , Enum. ii. 80. Perennial. Stems 
2- 3 feet long, triquetrous. Leaves coriaceous, linear, in. broad, as 
long as the stem. General involucre of 6-8 linear leaves 1-2 feet 
long. Spikelets panicled, arranged in a very compound umbel, the outer 
peduncles 3-4 in. long, each | in. long, 6-10-flowered. Glumes 
oblong-navicular, ^ in. long, much imbricated, distinctly nerved all 
over the back, subobtuse, drab-brown. Achene castaneous, glossy, 
obovoid, half as long as the glume. C. canescens, Vahl, Enum. ii. 355. 
Seychelles, common in swamps, Horne , 219 ! 648 ! Spread through the tropics 
of the Old World. 
23. C. pilosus, Vahl; Kunth , Enum. ii. 80. Perennial, tufted. 
Stems 1-2 feet long, triquetrous. Leaves § in. broad, sheathing the 
base of the stem for some distance, reaching a foot long. Spikelets laxly 
panicled, arranged in a compound umbel, bracteated by 3-4 long linear 
leaves, the lower peduncles 1-2 in. long ; each in. long, 6-10- 
flov\ered. Glumes nearly in. long, deltoid-navicular, subobtuse, 
much imbricated, greenish-drab, with a distinct 3-nerved green keel and 
drab sides. Achene triquetrous, half as long as the glume. C. obliquus, 
Nees ; Kunth , Enum. ii. 69. 
Mauritius, Bouton! Spread through the tropics of the Old World. 
24. C. Gardneri, Baker. Perennial Stem triquetrous, 1J ft. 
long. Leaves narrow linear, nearly as long as the stem. Spikelets 
crowded into globose heads, arranged in a compound umbel, bracteated 
by 5-6 long linear leaves, the outer peduncles 1J-2 in. long, eachf-J 
in. long, 30-flowered. Glumes in. long, deltoid-navicular, cuspidate, 
green or tinged with brown, much imbricated, many-nerved, with a 
distinct acute green keel. Achene oblong, glossy, nearly black, half as 
long as the glume. 
Mauritius, Gardner / Endemic. 
25. C. longifolius, Eoir. ; Kunth, Enum. ii. 30. Perennial, 
tufted. Stem 1^-2 feet long, triquetrous. Leaves 2-3 feet long, thin 
but firm, glossy, i-f in. broad. Umbel thrice compound, 6-9 in. long and 
broad, bracteated by 6-9 linear leaves \-l foot long, the outer peduncles 
3- 4 in. long; spikelets solitary or few together, in. long, 8-10 
flowered. Glumes deltoid-cuspidate,-^- in. long, much imbricated, with 
a 5-7-ribbed distinct green keel and drab sides. Achene nearly black, 
oblong-triquetrous, nearly as long as the glume. 
Mauritius, in woods of the Pouce, etc. Also Bourbon and Madagascar. 
26. C. latifolius, Eoir. ; Kunth , Enum. ii. 75. Perennial. Stem 
stout, 3-4 feet long, acutely triquetrous. Leaves rigidly coriaceous, 
strongly keeled, 2-3 feet long, an inch or more broad. Umbel very 
