RUBIACEAE. 423 



6. Borreria Wilsonii Britton, sp. nov. 



Perennial with a tap-root 1.5-2 dm. long, bushy-branched, about 1.5 dm. 

 high and as broad as high, the slender quadrangular twigs glabrous or very 

 nearly so, the internodes about as long as the leaves or somewhat longer. 

 Leaves linear, glabrous, 4-7 mm. long, about 1 mm. wide, apieulate, shining, 

 straight or somewhat curved with smaller ones fascicled in their axils; stipular 

 sheath with a few subulate teeth; flowers few together at the ends of the 

 twigs; calyx-lobes 4, lanceolate, acuminate, long-ciliate, 1.5 mm. long; corolla 

 4 mm. long, its lobes ovate, obtus-e. 



Castle Island (Wilson, 7787). Endemic. 



7. Borreria bahamensis Britton, sp. nov. 



A low much-branched glabrous shrub, 1.5-3.5 dm. high, the internodes 

 mostly less than 2 cm. long. Leaves linear, rather stiff, 8-15 mm. long, 

 mueronate, 0.5-1.5 mm. wide, usually with smaller ones fascicled in the axils; 

 stipular sheath few-toothed; flowers capitate at the ends of the branches, 

 subtended by the upper leaves, the heads about 5 mm. in diameter; calyx- 

 lobes 2 or 3, rarely 4; corolla white, 2-2.5 mm. long, its lobes ovate, acute. 



Sandy and rocky soil, Cat Island, Crooked Island, Fortune Island, Rum Cay. Am- 

 bergris Cay and Inagua. Type from Crooked Island (Brace. 'P-i'J)- Recorded by 

 Hitchcock as B. thymocephala Griseb., and listed by Coker as Bourrcria thymifolia. 

 Endemic. 



S. Borreria savannar-um Britton, sp. nov. 



A much branched glabrous shrub 3-10 dm. high, with very slender, 

 elongated, 4-angled branches, the internodes mostly longer than the leaves. 

 Leaves linear-filiform, 1-3 cm. long, about 0.5 mm. wide, thin in texture, 

 apieulate, darkening in drying, often with smaller ones fascicled in their axils; 

 stipular sheath with several subulate teeth; flowers capitate at the ends of the 

 branches, the heads 3-4 mm. in diameter, subtended by the uppermost leaves; 

 calyx with 4 linear lobes about as long as the tube; corolla white, 2.5 mm. 

 long, its lobes ovate, obtuse. 



Savannas, Inagua (type Xash & Taylor, 1320) ; also on Acklin's Island and For- 

 tune Island. Endemic. 



19. SPERMACOCE L. Sp. PI. 102. 1753. 



Herbs, with 4-sided stems, opposite stipulate leaves, and small white 

 flowers, in dense axillary and terminal clusters. Calyx-tube obovoid, or ob- 

 conic, its limb 4-toothed. Corolla funnelform, 4-lobed. Stamens 4, inserted 

 on the tube of the corolla. Ovary 2-celled; ovules 1 in each cavity; style 

 slender; stigma capitate, or slightly 2-lobed. Capsule coriaceous, didymous, 

 of 2 carpels, one dehiscent, the other usually indehiscent. Seeds oblong, 

 convex on the back; endosperm horny; embryo central; cotyledons foliaceous. 

 [Greek, seed-point, from the sharp calyx-teeth surmounting the carpels.] Two 

 or three species, natives of America. Type species: Spirmacoce tcnuior L. 



Glabrous or nearlv so: leaves 2 '> mm. wide. I. 8. tenuior. 



Pubescent with long hairs; Leaves 8-20 mm. wide. - 8. tetraquetra. 



1. Spermacoce tenuior L. Sp. PI. 102. 1753. 



Glabrous or nearly so. Sterna simple and erect or more or less diffusely 

 branched from the base, the branches L-3 dm. long; leaves linear, oblong or 

 oblong-lanceolate, 2-5 cm. long, acute or acuminate at both ends, narrowed 

 into short petioles; calyx-lobes Bubulate or lanceolate-subulate; corolla white, 



