690 PROCEEDINGS OF THE ACADEMY OF [Oct., 



subspecific — with some comment upon their status, the type locaUty 

 and the group to which the name belongs, viz., "A.B." = Acaulcscent 

 blue; ,"C.Y." = Caulescent yellow, etc. 



IVIany species recently described by Prof. Greene and Mr. Pollard 

 are" listed here which do not occur in the region that I have studied, 

 and I am quite unprepared to discuss their relationship. In order, 

 however, that some idea of their affinities may be obtained, I have 

 given the names of the better known species with which they are 

 compared in the original descriptions. 



I have likewise noted in brackets the reference to the Illustrated 

 Flora of Britton and Brown for all species recognized in that work. 

 Additional species recognized in Britton's Manual have references to 

 that work, and still others which are recognized in the preceding pages 

 are marked accordingly. 



The principal works and papers in which North American species 

 are described or in which the genus is reviewed arc : 



LiNN.EUs, 1753. Species Plantarum. 



Walter, 1788. Flora Carolina. 



AiTON, 1789, in Hortus Kewensis. 



MiCHAUX, 1803. Flora Boreali-Americana. 



WiLLDENOw, 1806. Hortus Beroliensis. 



Muhlenberg, 1813. Catalogue. 



PuRSH, 1814. Flora Americana Septentrionale. 



Smith, 1817, in Rees' Cyclopaedia. 



Elliot, 1817. Botany of South Carolina and Georgia, 



NuTTALL, 1818. Genera of N. A. Plants. 



ScHWEiNiTZ, 1822, in American Journal of Science. V. 



DeCandolle, 1824. Prodromus, I. 



Le Conte, 1828. Annals Lyceum N. Y., II. 



Don, 1831. General System. 



Gray, 1886. Botanical Gazette, XI, pp. 253-256 and 289-293. 



Pollard. 1896. Proc. Biological Soc. Wash., X, pp. 85-92. 



Pollard, 1898. Botanical Gazette, XXYI, pp. 325-342. 



Pollard, 1901, in Britton's Manual. 



Greene, 1896-1903. Various articles in Pittonia. 



acuta " Bigclow" Torrey. 1824. Flora U. S., I, p. 253. 



(A.W.) Proposed as a variety of and allied to lanceolata, if not 

 identical. Cambridge, Mass. 

 afjinis Le Conte. 1828. Ann. Lye. N. Y., U, p. 138. [Britt. 

 Manual, No. 9.] 

 (A.B.) 

 alahatnensis Pollard. 1900. Proc. Biol. Soc. Wash., p. 169. 

 (A.B.) Allied to villosa and Carolina. 



