350 RUBIACE.E. 



— Hab. Jamaica !, Wils., March, uncommon in the lower mountains ; Antigua !, Wullschh, 

 Dominica !, Imr., in savannahs, S. Vincent !, Guild. ; Trinidad !, Lockh., Sch., Cr., in fields ; 

 [French islands ! ; Guatemala ! to Peru ! and Brazil !]. 



163. B. Bartlingiana, DC! Annual, stout, suffrutescent; stem tetragonal; leaves 

 elliptical, elliptical-oblong, or ovate, acute or bluntish, pilose with scattered down, shortly 

 petioled or subsessile : veins 7-5-jugal: stipular bristles setaceous, scabrous, longer than 

 their sheath ; flower-whorls many-flowered ; calyx-teeth 4, deltoid-lanceolate, equal, one- 

 fourth to one-third as long as the ob ovate fruit ; seeds oval, minutely dotted: furrow 

 large. — Bigelowia alata, Bartl. ! Borr. Perrotetii, Benth. ! (non Miq.). B. Fockeana, Miq. I 

 B. tetraptera, Miq. /—Leaves 3"-8"' long ; heads 4"'-6"' diam.— Hab. Trinidad !, Lockh., 

 Cr.; [Mexico!, Venezuela!, Guiana!]. 



164. B. simplex, Gr. Rooting at the base, flaccid, glabrescent ; stem tetragonal ; 

 leaves lanceolate, pointed, subsessile, ciliate : veins 5-jugal : stipular bristles linear, ciliate, 

 longer than their sheath; axils 1-flowered ; calyx-teeth 2, "linear," at length obsolete; 

 fruit elliptical : seeds oval, rugulose. — Diodia, Sw. ! — Habit of Spermacoce tenuior. Stem 

 6"-8", leaves 1", fruit 2'" long. — Hab. Jamaica!, Sw., in the highest mountains, among 

 grasses. 



165. B. verticillata, Mey. Perennial, suffrutescent, glabrous ; stem tetragonal ; leaves 

 linear-lanceolate, shortly acuminate, sessile: veins distant, sub-2-jugal; stipular bristles, 

 setaceous, as long as or a little longer than their sheath ; heads and accessory whorls globose : 

 involucre 2-leaved; calyx-teeth 2 (-4), lanceolate, bluntish, half as long as the ovate-oblong 



fruit; seeds oblong-linear, roughish. — Spermacoce, Sw. — 1'-4' high ; leaves 1 a " — 1 " l° n £> 

 3"'-2'" broad; heads 6'" diam. : corolla small, white. — Hab. Jamaica!, all coll., in dry pas- 

 tures; [Haiti !, Mexico ! to Uruguay !]. 



166. B. spinosa, Cham. Schlecht. Annual, rigid ; stem 4-keeled-subcylindrical : keels 

 and leaf-ribs scabrous or somewhat muricate ; leaves lanceolate-linear, bluntish at the acu- 

 minate top, sessile, scabrous on the margin: veius distant, 2-3-jugal: stipular bristles 

 setaceous, nearly as long as their sheath ; heads and whorls many-flowered : involucre 4-8- 

 leaved ; calyx-teeth 2 (-4), lanceolate, acuminate, one-third as long as the oblong fruit ; 

 seeds oblong-linear, roughish. — Spermacoce, Sw. B. densiflora, DC. — 1' high ; leaves 2%"- 

 1" long, 4"'-2'" broad; heads 6"'-4'" diam.— Hab. Jamaica (Sw.), in fields of the northern 

 districts; [Martinique!, Sieb. Mart. 272 ; Mexico !]. 



167. B. podocephala, DC. Suffrutescent, branched, glabrous or glabrescent; stem 

 slender, tetragonal at the summit ; leaves linear, tapering-sessile : veins obsolete : stipular 

 bristles setaceous, nearly as long as their sheath ; heads small, many-flowered : whorls none 

 (or rare) : involucre 2(-4)-leaved; calyx-teeth 2, deltoid or lanceolate, one-fourth to one- 

 third as long as the minute, obovate-oblong fruit ; seeds oblong-linear, roughish. — 1'-3 

 high ; leaves 1"-A'" long, H'"-V" hroad; heads 2"'-3'" diam.— Hab. Antigua !, WullschL, 

 on the seashore, Dominica !, Imr, in savannahs ; [Cuba !, Desirade !, Texas !, Mexico 1]. 



168. B. thymifolia, Gr. (n. sp.). Suffrutescent, diffuse; branches low, tetragonal, 

 scabrous on the edges ; leaves thickish, recurved, linear, channelled-triquetrous, pungent, 

 sessile, glabrous, minutely ciliate, fascicled in the axils : veins inconspicuous : stipules subu- 

 late, ciliate, with the point as long as the sheath ; flowers all terminal in few-flowered 

 heads, supported by the uppermost leaf-pair ; calyx-teeth 2, oblong-lanceolate, pointed, 

 thickish, half as long as the corolla, longer than the obovate-oblong fruit, 2 accessory seta- 

 ceous, or none ; seeds oblong, smooth. — Habit of B. ericifolia, but from its stipules ap- 

 proaching Anthospermea. Stem with short inlernodes, resembling a Mediterranean Thymus ; 

 leaves 2"'-l'" long : stipules minute, pointed, or pungent, sometimes cut, but devoid of 

 bristles, the hairs being as small as on the leaf-margin ; calyx-lobes connected above the 

 ovary into a ciliate sheath ; corolla-tube filiform-clavate, 2'" long, thrice as long a3 the lobes ; 

 anthers 4, oblong, incumbent : filaments short, inserted into the throat ; style shortly 2-fid : 

 stigmas clavate; capsule small, glabrous; seeds furrowed on the inner side. — Hab. Baha- 

 mas !, Hjalmars., Turk Islands. 



56. MITRACARPUM, Zucc. 

 Character of Diodia, but capsule circumscissile about, the middle. 



169. M. villosum, Cham. Schlecht. Annual ; stem simple or few-branched, villous- 



