3C0 ckcn&M. 



date at the base, pedatinerved, puberulous beneath : lobes spreading, oblong or ovate-oblong, 

 blunt : stipules cordate-roundish, large, persistent ; calyx-limb inflexed, 6-spurred at the 

 base, campanulate, abruptly unilabiate at its truncate mouth : lip roundish or ovate-oblong, 

 produced at the top into a long , filiform tail. — Jacq. Eclog. t. 26 ; Bot. Mag. t. 3769. — A. 

 macrura, Mart. A. caudata, Hook, {non L.). — Leaves 3"-6", stipules 1"-H" diam. ; inflated 

 base of the calyx-limb ovoid, l"-2" long : basilar spurs bluntly filiform, 2"'-3'" long : upper 

 portion of the tube 2"-2^" long : lip 8'" diam., tail several inches to above a foot long. — 

 Hab. Jamaica!, Dist., Wils. ; Antigua!, Wullschl.; Dominica !, Imr. ; Barbadoes!; Tri- 

 nidad!, Sch.; [S.Thomas!, Guadeloupe!; Panama!, Guiana!, Brazil!]. 



**** Calyx-lip single, continuous icith the tube. 

 6. A. obtusata, Sw. Stem twining, glabrous ; leaves cordate-oblong, bluntish, pe- 

 datinerved, puberulous beneath : basilar sinus narrow, open -. stipules none ; calyx-limb 

 " straight : lip continuous with the tube, ovates blunt, devoid of a terminal appendage, ex- 

 ternally pubescent." — Plum. Ed. Barm. t. 33. — Leaves 3"-4", calyx-limb 1" long.— Hab. 

 S.Vincent!, Guild.; [Guadeloupe!]. 



LXXXIV. CACTEJS. 



Sepals, petals, and stamens indefinite, connected below. Pistil paracarpous : ovary in- 

 ferior, unilocular, many-ovulate : stigmas distinct. Pericarp baccate. Seeds exalbuminose, 

 or with a scanty, central albumen. — Succulent plants ; leaves mostly abortive, transformed 

 into spine fascicles ; flowers sessile. 



The berries of many Caclem are eatable. Of this Order I possess only scanty materials, 

 chiefly collected by the Rev. Mr. Wullschlaegel ; to these I add only such species, the spe- 

 cial habitat of which has been verified in the country. 



1. MAM1LLARIA, Haw. 



Calyx-tube produced beyond the ovary, naked below. Embryo nearly undivided : cotyle- 

 dons minute, pointed : albumen nearly wanting. — Stem globose or cylindrical, tubercled : 

 tubercles terminated with a fascicle of spines ; flowers usually inserted into the tubercle- 

 axils. 



1. M. simplex, Haw. "Stem simple, globose, at length obovoid-oblong : tubercles 

 conical -ovate, blunt, bearing scanty wool on the areolse: spines straight, 12-16 radial 

 spreading, 4-5 central as stout : axils glabrous ; flowers axillarv, yellow (8'" long)." — Tuts. 

 ft, 2. *. 82.— (Cactus mamillaris, Z.— 4"-5" high ; tubercles" &"-T", spines 4'" long.— 

 Hab. Jamaica (P. Br.) ; [Haiti, Venezuela]. 



2. MELOCACTUS, DC. • 



Character of Mamillaria, but the minute cotyledons " globose." — Stem globose or conical, 

 devoid of prominent tubercles, coslate, terminated with a large, woolly crown : flowers 

 small, concealed within its wool. 



2. M. communis, DC. Stem globose, at length ovate-oblong: ridges 12-20, argute, 

 vertical-, areolse 12(-6)-spinose: spines stout, rigid, exterior spreading, inferior longest; 

 crown cylindrical : its slender spines as long as the wool. — Tuss. Ft. 2. t. 27 ; Desc. Fl. 7- 

 t. 315. — Cactus Melocactus, L. — Apparently variable in the number of ridges and spines ; 

 our specimens answer to Pfeiffer's diagnosis of a ; Tussac's figure has shorter and less unequal 

 spines. Stem " at length above 1' high :" spines 12"'-6'" long ; flowers crimson. — Hab. 

 Jamaica {Macf.), gregarious in dry savannahs ; Antigua!, Wullschl.; [Haiti, etc.]. 



3. CEREUS, Haw. 



Calyx-tube produced beyond the ovary, scaly with adnate exterior sepals. Stamens mul- 

 tiserial upon the corolla-tube. Embryo usually curved : cotyledons incumbent to the hilum : 

 albumen nearly wanting. — Stem costate ; flowers lateral. 



