1224 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



beneath, sometimes merely granular; spikes on long or short peduncles, short 

 or elongate, usually dense; corolla white, about 4 mm. long; fruit red. 

 "Tacotillo," "vara prieta " (Sinaloa) ; "hierba del pasmo " (Sonora) ; " azota 

 caballos" (Tabasco, Rovirosa) ; " chovarobo," " sangre de toro " (Oaxaca, 

 Chiapas, Seler) ; "oreja de raton " (Conzatti) ; " xcopchS " (Yucatan, Maya) ; 

 "basora prieta," " saraguaso " (Porto Rico); " cuajatinta " (El Salvador). 



The specimens exhibit notable variation in pubescence and leaf form, but 

 they do not afford constant characters for specific segregation. In El Salvador 

 the plant is said to be used for coagulating rubber and indigo. 



DOUBTFUL SPECIES. 



CoKDiA coLLococcA L. Sp. PI. ed. 2. 274. 1762. Reported from Oaxaca by 

 Hemsley, but the report is probably based upon an incorrect identification. 



CoRDiA FOLiosA Mart. & Gal. Bull. Acad. Brux. 11': 330. 1S44. Type from 

 Zacuapan, Veracruz. 



CoRDiA HAKTwissiANA Regel, lud. Sem. Hort. Petrop. 39. 1858. Type from 

 southern Mexico. 



CoRDiA EOTATA Moc. ; DC. Prodr. 9: 483. 1845. Based upon one of SessS and 

 Mociiio's plates.i 



CoKDiA SERRATiFOLiA H. B. K. Nov. Gen. & Sp. 3: 76. 1819. Type from 

 Campeche. 



2. BOURREEIA P. Br. ; Jacq. Enum. PI. Carib. 2, 14. 1760. 



Shrubs or trees; leaves alternate, petiolate, entire; flowers rather large, 

 white, in terminal corymb-like cymes; calyx campanulate, 2 to 5-lobate, the 

 lobes valvate; corolla salverform, the limb usually 5-lobate; styles 2-cleft, the 

 stigmas flattened ; fruit a drupe, containing 4 bony nutlets. 



Calyx glabrous outside or nearly so. 



Filaments glabrous 1. B. pulchra. 



Filaments pubescent^ 

 Corolla 2 cm. long or more ; leaves obtuse or acute at base. 



2. B. formosaij 

 Corolla about 13 mm. long; leaves mostly subcordate at base. 



3. B. purpusii. 

 ('alyx tomentose or sericeous outside. 



Leaves abruptly short-acum'nate; corolla tube much exceeding the calyx. 



4. B. rekoi. 

 Leaves obtuse or rounded at apex ; corolla tube about equaling the calyx. 

 Leaves glabrous beneath. 



Leaves glabrous on the upper surface 5. B. revoluta. 



Leaves scaberulous on the upper surface 6. B. obovata. 



Leaves strigose or tomentose beneath. 



Leaves tomentose or velutinous beneath with loose &preading hairs. 



Corolla lobes oblong, acutish 7. B. sonorae. 



Corolla lobes rounded 8. B. andrieuxii. 



Leaves strigose or appressed-pilose beneath. 

 Leaves 3 times as long as broad or longer, the lateral nerves nearly ob- 

 solete 9. B. spathulata. 



Leaves mostly twice as long as broad or less, the lateral nerves con- 

 spicuous 10. B. strigosa. 



1 DC. Calq. Dess. Fl. Mex. pi. 880. 



