36 ME. C. B. CLABKE ON INDIAN SPECIES OP CYPERUS. 



symmetrica; margo rhachillae adjectus. — TJmbellulae nudae vel a 

 bracteis parvulis suffultae. Spicuhe multi-(10-60-)florae, persis- 

 tentes. Rhachillae alae angustae, persistentes, hyalinae, inter- 

 dum purpureo-maculatge. Filamenta 1-2-3, ligulata, parum 

 dilatata, saepissime (interdum conspicue) papilloso-scabrata ; an- 

 therae rnuticae aut vix apicatae, nee cristatae. 



Glabrae. Species plures annuae; paucissirnae stoloniferae aut 

 late repentes ; omnes typice foliaceae, exempla pauca foliis omni- 

 bus ad vaginas depauperatis reperiuntur, mibi varietates merae. 

 Formae pygmaeae (imo acaules), interdum L-4 cm. longae, in plu- 

 ribus speciebus bene notis visae sunt. 



This is the most natural and the most easily separable sub- 

 genus of all in Cyperus ; and few differences of opinion have 

 occurred as to the position of any of its species. I have removed, 

 however, two (G. diaphanus, Schrad., and C. Barteri, Boeck.) 

 into Juncellus. Of these, probably, Boeckeler had not the ripe 

 nut. 



A single detached nut ofPycreus can generally be known from 

 one of Juncellus by tbe fact that its two halves, made by a plane 

 through its broadest part, are similar (fig. 42) ; whereas in Jun- 

 cellus they are not (fig. 44), owing to the upper part of the nut 

 being always more or less curved inwards towards the rhachilla. 

 But the nut of Pycreus is not rarely somewhat unsymmetric in 

 the other plane (fig. 44), owing to the margin of the nut on one 

 side being pressed against the rhachilla ; this is a marked cha- 

 racter in some species, as in G. sulcinux below. 



* Cellulce extimai nucis oblongw (figs. 40, 41). 



t Species in Indid Orientali indigence. 

 2. C. elavescens (Linn. Sp. PI. p. 68, nee Linn. h. propr.)', 

 umbella specie simplice aut subcapitata ; bracteis 3-4, divaricatis, 

 umbella longioribus ; spiculis niultifloris, lineari-oblongis, com- 

 pressis, subturgidis ; glumis ovatis, obtusis, flavescenti-stramineis ; 

 nuce cum ^-| parte glumae sequilonga obscurius transversim 

 notata. — Lam. 111. t. 38. fig. 1; Eoem. et Sch. Syst. ii. p. 191; 

 Host, Gram. iii. t. 72 ; Bertol. Fl. Ital. i. p. 261 ; Sibth. Fl. 

 Qrcec. t. 47; Reichb. 1c. Fl. Germ. t. 278. fig. 662-604; Poit. et 

 Turp. Fl. Paris, t. 74 (non visa) ; Fl. Ban. t. 1682 ; Sturm, Fl 

 Bmtsch. xiii. t. 52 (opt.) ; Anders. Cyp. p. 1, t. 1. fig. 1 ; Ledeb. 

 Fl. Boss. i. p. 239 (var. /3 excl.); Gren. et Godr. Fl. Fr. iii 



