462 CYPERACEAE. _ [Cyperus. 
Spikelets greenish ; umbels ‘erie open, with longest rays 6—9 
and branching in their upper third or fourth only ed 
g): 
Ochreae foliolate; branches or ra gino mrad alternate; 
glumes thin, acute, ba ig below the apex . C. strigosus. 
Ochreae truncate or bidenta ences gist lor 2 pairs, 
closely set; spikelets at as resupi 
— despa tuse, not mucronate; deta 3“ long, 
. C. decipiens. 
( ctuanes ‘thick coriaceous, acute, mucronate at the apex; ; 
lon 
pi s 6—8” ‘ 12. €. hypochlorus. 
_ Spikelets near seri um el large compou und: 
Radioles umbellate; ce ale brownish, with 8—16 
F4 cubes rhachis articnlate (Diclidium) ; Z 8. C. auriculatus. 
Radioles alternate, bra she erp ines reddish, with 5—7 
glumes; rhachis fg shierihe ; : 9. C. Prescottianus. 
dehoes glumes 4 or les d, articulate ab the 
© lowest empty shames (me Marise es 
Abbot deep brown or reddish; soeeieis ste sri 
Spikes ovoid, or short- and thick-cylindric 
Umbel simple, short, compact, the Jager rays not weaning 
14/2‘, most spikes egal oi kelets 1—2-flowere 
st t lov 
Glumes, at leas e r ones, scabrous at the keel 15. C. phleoides. 
Glumes smooth at the 16. 0. Hawaiiensis. 
Umbel compound, the ie spikes closely set at the ends 
of rays, the longest rays 4—5'; ort e glumes 3—4 13. C. Kunthianus. 
_— SOMES | domostrnel in a compact but compound 
ertile glum i ( . C. Mawiensis. 
Spikes ¢ green, elongate; eae peakcoon subuiate j ‘ ‘ 17. C. umbellatus. 
1. C. laevigatus, L. — Steudel, Synops. Pl. Glum. II, 12. — Rhizome 
creeping. Stems 1—2 ft. long, terete below, trigonous above, leafless or 
with only one very short linear inet foslea a leafless sheath. Spikelets 
2—30, mostly sessile, densely ¢ in a terminal cluster, each 4—6" 
long, 15—30-flowered, oblong, reas compressed, the lowest often 
curved. Involucral leaves 2, the upper one stiff, erect, appearing like a 
continuation of the stem and much exceeding the cluster in length 
Glumes pale, stiff, ovate, conchoid, obtuse, shortly mucronate, not keeled, 
but with a prominent median nerve. achis compressed parallel to the 
glumes, foveolate. Stamens 3, enclosed. Style bifid, exserted. Nut com- 
pres parallel to the rhachis, plano-convex, ovate or rounded, apiculate, 
smooth, about ‘is shorter than its glume. — Boeckeler, in Linnaea, XXXV, 
6. — C. mucronatus, Rottb. var. 2. — Kunth, Enum. Pl. II, 17. — Hook. 
& ky in Bot. Beech. p. 99. — Mann, Enum. 
t or brackish water, plentiful near Honolua (Altipakal). — A common 
plant “a4 many sd gm countries mo * New and Old Wo: — — —? also to the Cape 
of Good e Mediterra region. — Nat na The fine and 
highly prized root mnats are miata. of this plant. 
2. C. polystachyus, Rotth, — Kunth, Enum. Pl. II, 13. — Stems 
tufted from a short pr aeerite rhizome, slender, Ae glabrous, 8—30’ 
» leafy at and above the base. Leaves generally shorter than the 
tind rarely as long, hardly 2“ broad, flat, distantly scabrous on the 
