CYPERACEiE. 569 



rusty ; fertile glume membranaceous at the margin, oblong, bluntish, 5-7 -'nerved with the 

 lateral nerves delicate, twice as long as the obovate- oblong achenium : uppermost glume 

 exserted, sharply keeled ; stamens 3 ; style 2-fid. — SI. t. 87. f. 2. — Mnriscus, V. K. glo- 

 bosa, P. B. K. vaginata, Lam. {ex parte). — Stems approximate along the rhizoma, 2'-lV 

 high, triquetrous at the tapering summit; heads dense, 6"'-4"' diani. ; spikelets l£"'-2"' 

 long. — Hab. Jamaica!, Pd., March, AL, on the seashore; Antigua!, Wullschl. ; Trini- 

 dad !, Cr. ; [Haiti and Mexico to Ecuador ! ; trop. Africa]. 



3. REMIREA, Aubl. 



Spikelets 1-flowered : 3 or more inferior glumes empty, the uppermost fertile, at length 

 leathery, including the achenium. Stamens 3. Style 3-fid : the achenium beaked by its 

 base. — Rhizoma branched ; stem densely leafy ; leaves rigid, spreading, channelled, taper- 

 ing into a pungent point ; heads dense, several in a cluster. 



41. R. maritima, Anhl. Leaves subdistichous ; clusters sessile. — 3"-4"high; leaves 

 1"-1£", clusters 4"'-6'" long; sterile glumes many-nerved, pale or pale-brown, the fertile 

 dotted. — Hab. Trinidad !, Pd., Cr., on the seashore ; [Panama ! to Brazil ! ; West coast of 

 trop. Africa]. 



4. ABILDGAARDIA, V. 



Character of Cyperus, but fertile glumes becoming 3-stichous by torsion of the rhachis, 

 style jointed at the base, and achenium mostly tubercled or winged.— Spikelets compressed : 

 rhachis winged ; style Z-fid. 



42. A. monostachya, V. Perennial ; stem usually exceeding the narrow leaves ; spike- 

 lets single (-2), terminal, ovate, pointed, pale, many-flowered ; glumes 3-nerved at the 

 keel, 2 lowest empty, mucronate ; achenium tubercled, 3-costate-suba;lobo8e, shortly stipitate. 

 —SI. t. 79. /. 2. Rottb. Descr. I. 13. / 3.— Cyperus, L.— 4"-6"(-12") high ; spikelets 

 3"'-4'" long. — Hab. Jamaica !, Wils. ; Antigua !, Wullschl., Dominica !, Imr. ; Trinidad !, 

 Sieb. ; [Cuba ! to Brazil ! ; East Indies ! to the Cape and Australia]. 



Tribe II. SCIRPFAE. — Flowers hermaphrodite (or polygamous) -. scales 

 imbricated all round. 



5. SCIRPUS, L. 



Glumes devoid of included scales, most fertile, or 1-2 lowest sterile : the flower often sup- 

 ported by bristles. Achenium headless, or crowned with the thickish base of the style. — 

 Spikelets single, or cymose. 



Sect. 1. Eleocharis, R. Br. — Flowers supported by bristles for the bristles sometimes 

 abortive). Achenium jointed with the persistent, thickish base of the style (the tubercle). 

 — Spikelets single terminating the naked stem. 



. 

 * Stem striate, knotless, and devoid of distant transverse partitions of the pith. 



43. S. retroflexus, Pair. Rhizoqaa filiform, fibrous at the tufts ; stems low, angular, 

 capillary, knotless, recurved ; spikelets elliptical-oblong, few-flowered ; glumes few-ranked, 

 oblong, bluntish, the lowest half as long as the spikelet or longer ; style Z-fid ; achenium 

 pale, obovate, S-keeled with convex, delicately and densely striate sides, exceeding the 

 bristles: tubercle small, conical, pointed. — Cyperus depauperatus, V. (Eleocharis, Kth.). 

 Chsetocyperus polymorphus a, Ns. Ch. rngulosus, Ns. ! l"-3"(5") high ; spikelet l'"-2'" 

 long, pale, or purple-variegated : flowers 2-6, lowest glume £ '"-1 "' long. —Hab. Jamaica !, 

 Pd., Wils., in ponds and wet places ; Dominica, Imr. ; Trinidad, Cr. ; [Cuba 1 and Mexico ! 

 to Brazil!]. 



44. S. exigtras, Kth. Rhizoma creeping ; stem long, angular, capillary, knotless ; 

 spikelet elliptical-oblong, &-l2-flowered ; glumes few-ranked, oblong, bluntish, subequal; 

 style 3-2-fid ; achenium pale, obovate, subcompressed, %-keeled with 2 turgid-convex, smooth 

 sides, exceeding the few bristles, or bristles wanting: tubercle depressed-mamillar,flattish, 

 shortly mucronate at the centre. — Eleocharis, Schult. — Habit of S. acicularU, L., 3"-5" 



