88 RUBIACE.S:. Spermacoce. 



mens glabrous. Leaves about an inch long. AVhorls fe\v-(fi-10-) flowered. 

 Flowers smaller than in the preceding species. Anthers roundish-oblong. — 

 This is chiefly a West Indian species, and we doubt whether it has been 

 found hitherto within the limits of our Flora. 



t Doubtful Species. 



4. S. involucrata (Pursh) : stem alternately branched, very hispid ; leaves 

 ovate-lanceolate, acuminate, hirsute on both surfaces; stipules with many 

 bristles; heads terminal, involucrate : stamens exserted. Pursh,fl. 1. 2}- 105. 



Carolina, Fraser. — About a foot high. Leaves broad and somewhat ob- 

 lique. Flowers white, with a very long tube. Pursh. — The specimen in 

 Mr. Lambert's herbarium, which is said to have been collected by Fraser 

 (but we suspect there is some mistake as to the locality), is marked, perhaps 

 by Mr. Don, " S. strigosa, Bot. mag.^'; a species which has been referred to 

 the genus Crusea. 



3. BORRERIA. Meyer, fl. Essequeh. p. 79 ; DC. prodr. 4. f. 540. 



Bigelovia, Spreng. syst, ; not Spreng. enfd., nor of Smith, nor of Raf. nor of DC, 



Calyx-tube ovate ; the limb persistent, 2-4-toothed. Corolla infundibuli- 

 form or hypocrateriforra, 4-lobed. Stamens 4. Stigma 2-cleft or undivided. 

 Fruit dry, crowned with the teeth of the calyx, 2-celled ; the 2 one-seeded 

 carpels separating from the apex downwards, and each dehiscing equally by 

 a longitudinal chink along the inner surface. Seeds obovate-oblong, marked 

 on the face with a longitudinal furrow. — Herbaceous or suflfrutescent (tropi- 

 cal) plants. Leaves sometimes apparently verticillate from the fascicles in 

 the axils. Stipules cohering with both petioles, fringed with several bristles* 

 Flowers small, in axillary or terminal usually capitate whorls, blue or 

 white. 



1. B. wicrantha : annual; stem prominently 4-angled, glabrous; the 

 nodes distant ; leaves linear-lanceolate, acute at each end, scabrous above, 

 nearly glabrous underneath ; bristles of the stipules 8-10, much longer than 

 the scabrous sheaths ; whorls many-flowered, all of them axillary ; calyx- 

 tube hispid ; corolla hypocrateriform, shorter than the calyx-teeth ; capsule 

 ovate, membranaceous, crowned with the 4 spreading lanceolate-subulate 

 calyx-teeth. 



Tampa Bay, Florida, Dr. Leavenworth ! — Stem 2 feet or more in length 

 (erect?); the internodes about 2 inches long. Leaves 1-2 inches in length, 

 and 2-3 lines wide, almost hispidly scabrous above. Whorls 40-50-flowered. 

 Corolla white, scarcely a line long. Stamens very short. Style included, 

 notched at the apex. Capsule at first splitting within the calyx-teeth con- 

 trary to the dissepiment, and afterwards septicidally nearly to the base. 

 Seed oblong, nearly terete, black, strongly pitted, with a narrow groove on 

 the face. — In the mode of dehiscence, this plant resembles Hedyotis, one 

 species of which (H. monosperma, Wight Sf Am.) has but a single seed in 

 each cell. 



4. DIODIA. Linn. ; GtBrtn.fr. t. 25 ; DC. j^-odr. 4. p. 561. 



Calyx-tube ovate or obovate, often 8-nerved ; the limb 2-4-parted. Corol- 

 la infundibuliform or tubular, 4-lobed. Stamens 4, inserted into the throat 

 of the corolla. Stigma or style 2.-cleft or undivided, Fruit dry or sHghtly 



