Cyperus .] 
CTPERAOEJE. 
411 
Achene brown, obovoid-triquetrous, a third as long as the glume. 
C. bicolor, Vahl ; Bojer, Hort. Maur . 379. C. maritimus, Bojer , Hort. 
Maur. 378. 
Mauritius, in damp places and a troublesome weed in cultivated ground* Round 
the world in the tropical and warm temperate zone. Herbe a Oignon. 
15. C. amabilis, Vahl; Kunth , Enum. ii. 108. Annual, densely- 
tufted. Stems 3-6 in. long, slender, triquetrous. Leaves linear- 
subulate, as long as the stem. Clusters numerous, in a slightly 
compound umbel bracteated by 4-6 subulate leaves, the outer clusters 
on 2-3 in. peduncles ; spikelets 20-30-flowered, in. long. G-lumes 
ovate-navicular, in. long, much imbricated, obtuse, bright red-brown, 
with a narrow 3-nerved green keel. Achene bright brown, obovoid- 
triquetrous, a third as long as the glume. 
Seychelles, common in damp place, Horne , 634 ! Through the tropics of the 
Old World. 
16. C. longus, Linn.j Kunth , Enum. ii. 60. Perennial, with a creeping 
aromatic rootstock. Stems 2-3 feet long, moderately stout, triquetrous. 
Leaves narrow linear, shorter than the stem. Clusters numerous, 
arranged in a compound umbel, bracteated by 4-5 ft. linear 
leaves, the outer clusters on 3-4 in. peduncles ; spikelets f-f in. long, 
20-30-flowered. Glumes in. long, ovate-navicular, bright red, with 
a distinct 5-nerved green keel, subobtuse, much imbricated. Achene 
oblong-triquetrous, a third as long as the glume. C. pertenius, Bojer , 
Hort. Maur. 379. 
Mauritius, in swamps of the Trou Fanfaron, etc. Through the warmer regions 
of the Old World. 
17. C. distans, Linn. ; Kunth , Enum. ii. 93. Perennial. Stems 
stout, tufted, triquetrous, 2-4 feet long. Leaves | in. broad, nearly 
as long as the stem. Clusters very numerous, arranged in a very 
compound umbel often a foot long, on long peduncles, bracteated by 
6-12 long linear leaves ; spikelets very slender, f-l'in. long, 10-15- 
flowered. Glumes oblong-navicular, in. long, obtuse, not at all 
imbricated, dark reddish-brown, with a 5-nerved green keel. Achene 
oblong-triquetrous, nearly as long as the glume. C. laxus, Vahl t 
Enum. ii. 362. C. nutans, Sieber , Herb. Maur. No. 34. 
Mauritius, Rodriguez, and Seychelles, common in swampy places. Spread 
through the warmer regions of the Old World. 
18. C. difformis, Linn. ; Kunth , Enum. ii. 38. Annual, tufted. 
Sterns 1-2 feet high, weak, angular at the top. Leaves narrow linear, 
flaccid, shorter than the stem. Involucre of 2-3 linear leaves, one 
