PRIMULA CONFERENCE. 



273 



but the following were only published subsequently to the prin- 

 ting of that catalogue. These are : — 



P. Pavidii, Franchet, E. Tibet. 



P. Forbesii, Franchet, Yunnan. 



P. incisa, Franchet, E. Tibet. 



P. malacoides, Franchet, Yunnan. 



P. rnalvacea, Franchet, Yunnan. 



P. mernbranifolia, Franchet, Yunnan. 



P. rnoupinensis, Franchet, E. Tibet. 



P. nutans, Franchet ex Delavay, Yunnan. 



P. oreodoxa, Franchet, E. Tibet. 



P. ovalifolia, Franchet, E. Tibet. 



P. Poissoni, Franchet, Yunnan. 



New Persian Species. 



P. heterochromia, Stapf., Persia. 

 This is described by Stapf. in Botan. Erbgenisse Folak. 

 (1880), p. 70. It is described as like a Primrose, but with leaves 

 white on the under surface. 



New Classification of Primula. 



Professor Van Tieghem has subjected to minute anatomical 

 scrutiny many of the species of Primula, including several of 

 those collected in Yunnan, and described by M. Franchet. 

 M. Van Tieghem's remarks have been published in the Bulletin 

 de la Societe Botanique de France, torn, xxxiii, pp. 95, 12G, 1886, 

 and in conjunction with M. Douliot in the Annates des Sciences, 

 ser. 3, torn. 3 (July 1886), p. 285, et seq. 



As M. Van Tieghem's characters are not likely to be turned 

 to practical use in gardens, it will suffice to say that his classi- 

 fication is based purely upon anatomical details, and that the 

 species are grouped under two genera, Primula and Auricula, 

 thus : — 



Central cylinder of the stem provided with pith, undivided, 

 but spreading out into a concentric ring of fibro-vascular 

 bundles .... Primula, Linnaeus. 



Central cylinder of the stem, without pith, slender, and 

 breaking up into a number of more or less detached fibro-vascular 

 bundles .... Auricula, Tournefort. 



