REPORT OF THE STATE BOTANIST, 1919 63 



B o n a m i a . The genus as now understood includes but three 

 American species, one in Florida, one in western Texas and one in 

 Coahuila, Mexico. 



Thyella hirtiflora (Mart. & Gall.) comb. nov. 



Ipomoea hirtiflora Mart. & Gall. Bull. Acad. Brux. XII., 2 : 264. 



1845. 

 Jacquemontia lactescens Seem. Bot Voy. Herald 171. 1852. 

 Convolvlus piosiflorus Moc & Sesse, Fl. Mex. in La Naturaleza 



II. 2: append. ^iT- 1893. 

 Thyella lactescens House, Torr. Club Bui. 33:314. 1906. 



The type locality is " Cerro de Lancon, near Panama" and the 

 species ranges from Oaxaca to Peru. Ipomoea hirtiflora 

 as treated in N. Y. Acad. Sci., i8: 193. 1908, by the writer, is a 

 misidentification, and the specimens there referred to Ipomoea 

 hirtiflora have since been renamed Ipomoea villifera. 



Jacquemontia obcordata (Millsp.) comb. nov. 

 Convolvulus obcordatus Millsp. Field Col. Mus. Bot., 2:88. 1900. 

 The type was collected near Progresso, Yucatan, by Doctor Mills- 

 paugh {No. 1707, 1899). This species is very closely related to 

 J. ovalifolia (Vahl) Hallier f., which is well represented by 

 material collected by Britton & Harris at Great Pedro Bay, Jamaica 

 and in Antigua. The type of Convolvulus ovalifolius 

 Vahl is probably not in existence, but the West Indian material 

 referred to matches the description of that species very closely. The 

 Yucatan specimens present certain wxU marked but minor points of 

 difference, and for the present they may well be regarded as dis- 

 tinct but closely related species. 



JACKSONIA Raf. Med. Repos. II., 5: 352. 1808. 



With no desire to revive the controversy, if such it might be called, 

 between Doctor Greene ( Pittonia, 2: 174. 1891 ; 274. 1892; Erythea, 

 2: 68. 1894) and Doctor Britton (Erythea, 2: 67, 68. 1894; Bui. 

 Torr. Club, 20: 271. 1893), the writer feels convinced that Jack- 

 sonia is the prior and correct name for the plant later designated by 

 Rafinesque as Polanisia. 



As the name is first published, it appears as though Rafinesque 

 designates as the type, Cleome dodecandra L. A perusal 

 of the article wherein this is published shows that Rafinesque was 

 presenting a '' prospectus " of two intended works on North Ameri- 

 can botany, and a reading of the entire article seems to indicate that 



