422 RUBIACEAE. 



1. Borreria laevis (Lam.) Griseb. PI. Br. W. I. 349. 1861. 



Spermacoce laevis Lam. Tabl. Encycl. 1: 273. 1791. 



Slightly pubescent, branched, the branches spreading or ascending, 1.5-3 

 dm. long, somewhat angled. Leaves oblong to elliptic-lanceolate, 2-4 cm. long, 

 acute or acuminate at the apex, narrowed at the base into short petioles, pin- 

 nately veined; stipular sheath subtruncate, bearing several bristles 46 mm. 

 long; flowers white, about 3 mm. wide, capitate-clustered in the axils; calyx- 

 lobes 4, ovate, minute; fruit obovoid, about 2 mm. long; seeds oblong, striate. 



Sink-holes, pine-lands and meadows, Great Bahama and New Providence to Wat- 

 ling's and Inagua : Bermuda ; West Indies and continental tropical America. Button- 

 weed. 



2. Borreria ocimoid.es (Burin, f.) DC. Prodr. 4: 544. 1830. 



Spermacoce ocimoides Burm. f. M. Ind. 34. 1768. 



Borreria parviflora G. F. W. Meyer, Prim. Fl. Esseq. 83. 1818. 



Annual, 6 dm. high or less, slender, erect or sometimes diffusely branched, 

 glabrous, the stem and branches 4-angled. Leaves linear to oblong-elliptic, or 

 the lower spatulate, 0.5-2.5 em. long, 1-8 mm. wide, acute, short-petioled ; 

 stipular sheath with setaceous teeth 2-3 mm. long; glomerules several-many- 

 flowered, 6-8 mm. in diameter; calyx-teeth 4, subulate, about 0.7 mm. long; 

 corolla white, a little shorter than the calyx-teeth, its lobes ovate ; fruit 

 ellipsoid to obovoid, pubescent, nearly 1 mm. long. 



South Caicos, Mariguana : Florida ; West Indies ; continental tropical America ; 

 East Indies. Slender Borreria. 



3. Borreria thymifolia Griseb. Fl. Br.W. I. 350. 1861. 



Perennial, suffrutescent; stems bushy-branched, forming clumps up to 1 

 m. broad, 3.5 dm. high or less, the internodes short, the 4-angled branches 

 loosely rather stiff-pubescent. Leaves linear, channeled, stiff, ciliate, 2-6 mm. 

 long, sessile, the apex spinulose-apiculate ; smaller leaves are commonly 

 fascicled in the axils of the larger ones; stipular sheath ciliate; flowers few 

 together in small terminal heads subtended by the upper leaves; calyx-lobes 

 2 or 3, oblong-lanceolate, sparingly ciliate, acute; corolla white, about 3 mm. 

 long, its lobes deltoid-ovate. 



Sandy and rocky soil, Turk's Islands. Endemic. 



4. Borreria inaguensis Britton, sp. nov. 



Intricately branched from a stout woody root, forming clumps 4 dm. 

 in diameter or more, about 2 dm. high, the branches very slender, 4-angled, 

 loosely soft-pubescent, the internodes mostly longer than the leaves. Leaves 

 linear, rather stiff, channeled, ciliolate, 1.5-3 mm. long, spinulose-tipped, 

 often with smaller ones fascicled in their axils; flowers few or solitary at the 

 ends of the branches subtended by the upper leaves; calyx-lobes 4, linear- 

 lanceolate, acuminate, 1 mm. long, with minute accessary teeth; corolla white, 

 nearly 2 mm. long, its lobes ovate-elliptic, obtuse. 



Scrub-lands, Moujean Harbor, Little Inagua (Nash <& Taylor, 212!,). 



5. Borreria saxicola Britton, sp. nov. 



Shrubby, loosely branched, 3-4 dm. high, the twigs slender, glabrous, 

 4-sided, the internodes mostly longer than the leaves. Leaves linear-oblong, 

 glabrous, rather firm in texture, 10-18 mm. long, 1.5-3 mm. wide, acute or 

 acuminate at the apex, slightly narrowed toward the base, usually with smaller 

 ones fascicled in the axils; stipular sheath sparingly puberulent, the stipules 

 short, acute; flowers capitate at the ends of the twigs, subtended by the upper 

 leaves; calyx-teeth 3 or 4, triangular-lanceolate, acuminate, glabrous, 1.5-2 

 mm. long; corolla 4.5-5 mm. long, its lobes ovate, obtuse. 



Loose rocky soil, South Caicos (type, Millspaugh, 92$2). Endemic. 



