412 
CYPEBACEJE. 
[■ Oyperus . 
much longer than the others. Spikelets capitate in globose clusters | 
in. broad, arranged in compound umbels, the outer on peduncles an 
inch or more long, each T \-% in. long, 10-20-flowered. Glumes 
roundish, obtuse, very small (^-g in. long) with a 3-nerved green keel 
and drab border, much imbricated. Achene obovoid, nearly as long 
as the glume. 
Mauritius, frequent in swamps. Spread through the warmer zones of both 
hemispheres. 
19. C. Iria, Linn.; Kunth, Enum.\\. 38. Annual. Stems densely 
tufted, -§-1 foot long, sharply triquetrous. Leaves narrow linear, as 
long as the stem. Spikelets copiously panicled, the panicles arranged in 
a compound umbel braeteated by 4-5 linear leaves, the outer umbels 
on 1-2 in. peduncles, each i- £ in. long, 10-15 -flowered. Glumes in. 
long, roundish-navicular, obtuse, little imbricated, drab, with a dis- 
tinctly 5-nerved green keel. Achene oblong-triquetrous, nearly as 
long as the glume. C. Santonici, Rottb. Descr. 41, tab. 4. 
Mauritius, in swamps at Fort George, etc. Also Madagascar and Tropical 
Asia. 
20. C. sequalis, Vahl ; Kunth , Enum. ii. 37. Perennial. Stems 
densely tufted, terete, 2-3 feet long, with 2-3 large clasping brown 
sheaths at the lower part not produced into leaves. Involucral bracts 
2-3, small, lanceolate ; rays of the umbel 50-100 or more, slender, 2-4 
in. long, subequal, bearing simple or slightly compound heads ; spikelets 
•5 — \ in. long, 10-30 flowered. Glumes deltoid-navicular, T V in. long, 
much imbricated, obtuse. Achene ovoid-triquetrous, i-J as long as 
the glume. Papyrus sequalis, Bojer , Sort. Maur. 581. Cyperus 
madagascariensis, Kunth , Enum. ii. 64. 
Mauritius, by streamsides at Flacq and Pamplemousses, and at the Mare aux 
Vacouas. Also Madagascar, Bourbon, and Natal. 
21. C. articulatus, Linn. ; Kunth , Enum. ii. 53. Rhizome creep- 
ing. Stems terete, stout, 3-5 feet long, containing numerous septa 
visible on the outside in dried specimens, but not when fresh, the 
scariose basal sheaths not produced into leaves. Umbel very com- 
pound, braeteated by 2-3 small lanceolate leaves, the outer umbels on 
2-3 in. peduncles ; spikelets f- in. long, 20-30-flowered . Glumes 
deltoid-navicular, subobtuse, drab or tinged with brown, in. long, 
with a distinctly 3-nerved green keel. Achene obovoid-triquetrous, 
glossy, dark , brown, half as long as the glume. 
Mauritius and Seychelles, common in swamps. Spread thr ough the tropics of 
both hemispheres. 
