167 



the question can be definitely settled more material should he collected in the West 

 Indies showing the variations of the typical form. The name hiimifusu is much older 

 than any other, ami in case the species should be reduced to varietal rank that name 

 should be used in preference to aphrodisiaca. 



An exhaustive monograph of this genus was published by Dr. I. 

 Urban in 188,'JJ Fifty-four species are enumerated. The genus Tur- 

 nera is strictly an American one, Brazil being the center of distribution ; 

 forty of the species are found in that country. Urban refers three 

 species to Mexico, only one(T. callosa) being endemic; two to Central 

 America, one (T. panamcnsis) being endemic; or four species to the 

 two countries. 



Three years before this Mr. Hemsley, in the Biologia Central i- 

 Americana, enumerated fourteen species for these countries, three being 

 given without specific names. The names there used were so widely at 

 variance with Urban's monograph, that Mr. Hemsley published a re- 

 arrangement of tlie species in the supplement to the Biologia Centrali- 

 Americana, For the benefit of those who may be working in this group, 

 I have thought best to publish these lists in parallel columns along 

 with a third, which shows my own treatment of the genus. 



Tiiree treatments of the species of Turnera. 



Species listed by Hemsley. 



Species recognized by Urban. 



Species and varieties now recog- 

 nized. 



1. T.alba Liebm. 



1. T. ulmifolia velutina (Presl) 



1. 



T. ulmifolia alba Rose. 



2. T. aphrodU'iacalj.V '.W ard. 



TJrb. subvariety 2. 



2. 



T.humifusa (Presl) Endl. 



3. T.caerulea DC. 



2. T. diffusa aphrodisiaca (Ward) 



3. 



T, ulmifolia caerulea (DC.) I'rb. 



4. T, cistoidcs L. 



Urb. 



4. 



Not of this genus. 



5. T. hindtiana Bentta. 



3. T. ulmifolia caerulea (DC) Urb. 



5. 



Not Mexican. 



6. T.humifusa (Presl) Endl. 



4. 1'iri'jueta eistoides Griseb. 



6. 



T.humifusa (Presl) Endl. 



7. T. mollis V.. 15. K. 



5. T. panamensis Urb. 



7. 



Not Mexican. 



8. T.pumilea L. 



C. T. diffusa Willd. 



8. 



T. pumilea. 



9. T. trionijlora Sims. 



7. T. ulmifolia elegans (11. B. K.) 



9. 



T. ulmifolia elegans Urb. 



10. T. ulmifolia L. 



Urb. aubvariety 2. 



10. 



T, ulmifolia L. 



11. T. velutina Fresh 



8. Not credited to Mexico. 





T. ulmifolia acuta Urb. 



12. Turnera sp. 



9. T. ulmifolia elegant (11. B. K.) 





T. ulmifolia tv.rinamensis( M iq . ) 



13. Turnera sp. 



Urb. 





Urb. 



14. Turnera sp. 



10. T. ulmifolia L. 



11. 



T. velutina Presl. 





11. T. ulmifolia velutina (Presl)Urb. 



12. 



Not Mexican. 





12. 



13. 



Not Mexican. 





13. T. panamensis Urb. 



14. 







14. 



1.".. 



T. callosa Urb. 





15. T. callosa Urb. 



16. 



T.palmeri Watson. 







17. 



T. pringlei liose. 



1 Jahrbuch des Kgl. 13ot. Gart. und Mus. Berlin, 2 : 1 to 152. 



