I 



i^jODiA. TETRANDRIA. MONOGYNIA. 171 



Elliott Sk. I. p. 190. Mich. Fl.^.2\. Roem. 4- 

 Schult. III. p. 284. D, teres Walt. Car. p. 87. 



Jioot perennial. S(e7n obscurely angular, of a purplish colour, 

 branched at the base. Leaves opposite, lanceolate, acute, sca- 

 brous on the margin. Flowers solitary, opposite. Siifiules 

 ciliate. Corolla white ; tube nearly half an inch long ; seg- 

 ments lanceolate. Calyx divided to the base into 2 subulate 

 segments. Fruit a little angular, 2-parted ? 



Hab. In Maryland. Muhlenberg. September. My spe- 

 cimens aie from Carolina. 



The genus Diodia, as characterized in the books, appears 

 to differ but little from Spermacoce, except in the calyx being 

 2-parted instead of 4-toothed. Mi c h au x remarks of Sper- 

 macoce diodina, " Diodia esset, nisi calyx 4-fiuus obsiaret." 



108. HEDYOTIS. L. 



Calyx 4-toothed or 4-partcd. Corolla infundibuli- 

 form, 4-partcd. Capsule 2-celled, opening transversely 

 at the top, many-seeded ; dissepiment contrary to the 

 valves. Gm. pi. 153. Juss. p. 198. Roem. £s? 

 Schult. Gen. 469. Nat. Ord. Rubiace^e Ju s s. 



H, glomerala Ell.: stem assurgent ; leaves lanceolate, 

 pubescent, attenuated at the base ; flowers fascicled, axillary 

 and terminal. Elliott Sk. L p. 188. H. auricularia 

 Walt. Car. p. 85. H. unifiora Lam. III. I. p. 271 .? H. 

 virginica Spreng. pug. II. p. 34. Ro em. <^ Schult, III. 

 p. 199. Oldenlandia unijiora Lin. W il I d. Special). 

 674. O. glomerata M i c h. Fl. I. p. 83. Pursh Fl. I. p. 

 i02. Muhl. Cat. p. 16, 



7?oo/ fibrous, annual, (perennial, somewhat stoloniferous. Ell.) 

 Stem from three-fourths of an inch to three inches in height, 

 erect, (when large it is branched and procumbent at the base,) 

 quadrangular, strigosely pubescent. Leaves elliptic-spathulate, 

 opposite, narrowed at the base into a short petiole, but a little 

 connate by the adnate stifiules^ which generally bear two or 

 three subulate processes ; those at the extremities of the 

 branches are crowded and almost sessile. Flowers axillary 

 and terminal, (the former are pedicellate) ; in the smallest 

 plants solitary and terminal. Calyx deeply 4-parted ; the di- 

 visions ovate, acuminate, scabrous, ciliate on the margin. Co- 

 rolla white ; tube very short ; segments ovate, generally ob- 

 tuse, spinulous, one-third the length of the calyx. Stamens 

 4 ; filaments opposite the segments of the corolla, short, in- 

 cvirved ; anthers subrotund, dark brown. Grrmen compress- 

 ed, nearly round, hairy; style extremely short, but distinct; 

 stigma capitate, undivided. Capsule large for the size of tlie 

 plant, globose-didymous, crowned with the persistent calyx, 



