Cyperus.] OLXXII. CYPERACEE. (C. B. Clarke.) 603 
17. C. pachyrrhizus, Nees ex Boeck. in Linnea, xxxv. 545; stems 
long robust at top trigonous 1-headed, leaves often as long as stem rigid 
concave, bracts 3-4 long spreading, spikelets very numerous densely 
agglomerated (otherwise as C. conglomeratus). C. B. Clarke in Journ. Linn. 
Boc. xxi. 111 ; Trimen Cat. Pl. Ceylon, 100. C. conglomeratus, Tw. Enum. 
- C. arenarius, Prain Laccadive Pl. in Ic. Mem. Med. Off. Army Ind., 
part v. (1890), 54 (not of Retz.). O. leucocephalus, Wight ms. (partly). 
CEYLON ; Thwaites, Wight, LACCADIVE Isups. ; Hume. 
Roots densely woolly, Stems 12-20 in. Head more than 1 in. in diam. of 
spikelets.—Trimen doubts (with reason) whether this is other than a large 
of C. conglomeratus, Rottb. 
18. C. effusus, Rottb. Descr. et Ic. 22, t. 12, fig. 3; spikelets linear 
compressed 20-60-fld., glumes most densely packed scarcely mucronate 
otherwise as C. conglomeratus). Kunth Enum. ii. 47; Edgew. in Journ. 
4s. Soc. Beng. xvi. 1990, C. proteinolepis, Steud. Syn. Cyp. 15; Boeck. 
i Linnza, xxxv. 522; O. B. Clarke in Journ. Linn. Soc. xxi. 113. C. con- 
glomeratus, var. effusa, Boiss. Fl. Orient. v. 369. C. conglomeratus, var. 
Major, Boeck. l.c. 544; C. B. Clarke l.c. 119. C. curvulus, Boeck. 
:€ 941 (partly). C. densus, Br. in Salt Abyss. Append. 62. 
SIND; Pinwi]].— DisTR(B. Westwd. to N. Africa. 
kelets 1—1 by 35-1 in. broad, much narrower than in C. conglomeratus. 
cU. effusus includes many plants differing greatly in size (as does C. conglomeratus) 
t all unlike C. conglomeratus in the exceeding closely packed glumes; the spike- 
ts are not longer than in C. conglomeratus, but have twice as many flowers. 
19. c. Atkinsoni, C. B. Clarke in Journ. Linn. Soc. xxi. 109; roots 
tot woolly, stems thickened at base approximated on a short rhizome top 
Sir terete, umbel simple contracted, spikelets linear much compressed 
fid. pale brown (otherwise as C. effusus.) 
Ka SENTR; Bimbur, Atkinson. N.W. HIMALAYA; Kotgurh, Thomson. SIND; 
chee, Stocks. _ 
as plant is not very near C. niveus (where originally placed) differing not 
cy by the umbellate spikes but by the structure of the spikelet, which is very 
^" to that of C. effusus. Though the character of woolly rootlets holds good in 
hat group throughout a great series of herbarium material, Schweinfurth tells me 
t ìt is not to be relied on for the discrimination of species, as it is merely an 
Ptation for growth in sand. 
b Sect. 6. Diffusi. Tall or middle-sized perennials with green somewhat 
Ce en 9-nerved leaves. Umbels compound, generally decompound. 
20-96.) 
b. €. diffusus, Vahl Enum. ii. 321; spikelets 4-24-fld., glumes 
Sadly ovate suddenly acute-mucronate in fruit somewhat distant upper 
ou Eins not imbricate, nut broadly ellipsoid triquetrous subpyramidal at 
her end à length of glume. Nees in Nov. Act. Acad. Nat. Cur. xix. 
SI, 1.58; Mig. FI. Ind. Bat.iii. 264. C. elegans, Sw. Obs. Bot. 30 ; Kunth 
X um. ii. 28; Boeck. in Linnea, xxxv. 533 ; C. B. Clarke in Journ. Linn. Soc. 
in 288 and xxi. 195 excl. tab. Sloane (not Linn.). C. longifolius, Decne. 
b Nous, Ann. Mus. iii. 359; Ridley in Forbes East. Archip. 520 (not 
wy C. mostus, Kunth lc. 31. C. nigro-viridis, Thw. Enum. 344. 
D. Oe Wall. Cat. 3358, 3362, 3370, A. Hypslyptum, Gif. Itin. Notes, 
