176 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



P. macrocarpa, Maxim. (Sect. Macrocarpa.) Mt. Hayaschine, 

 Province of Rikuchu. 



P. farinosa var. misiassinica, Makino. 



P. Hayaschinei, Petitm. 

 P. Matsumurae, Petitm. = modesta. 



P. modesta, Bisset et Moore. (Sect. Farinosa.) From Yezo to 

 Shikoku. Cult. Introd. 1911, R. B. G., Edin. 

 P. farinosa subsp. modesta, Pax. 

 P. farinosa var. luteofarinosa, Franch. et Sav. 

 P. Matsumurae, Petitm. 

 Microform : 



P. Faurieae, Franchet. Yezo, Kurile Islands. 

 P. farinosa var. Faurieae, Miyabe. 

 P. Fauriei, Pax. 



P. modesta var. Faurieae, Takeda. 

 P. nipponica, Yatabe. (Sect. Cuneifolia.) Northern Hont6. 

 P. patens, Turcz. = Sieboldii. 



P. Reinii, Franch. et Sav. (Sect. Reinii.) Central Japan. Cult. 



Introd. about 1909 ? 

 P. Sieboldii, E. Morren. (Sect. Cortusoides.) Hontd, Yezo, 

 Kyushu. Also Transbaikalia. Cult. Introd. 1861, Veitch 

 Coll. J. G. Veitch. 



P. cortusoides, Thunb. (non Linn.). 

 P. cortusoides var. amoena, Lindl. 

 P. cortusoides var. grandiflora, Verschaffelt. 

 P. cortusoides var. patens, Turcz. 

 P. gracilis, Stein. 

 P. patens, Turcz. 

 P. tosaensis, Yatabe. (Sect. Reinii.) Shikoku. 

 P. veronicoides, Petitm. = Stimpsonia chamaedryoides, Wright. 

 P. yedoensis, Franch. et Sav. = jesoana. 



It is noteworthy that these Japanese species belong to no less than 

 eight separate sections of the genus, and I will deal with these sections 

 successively. 



Section Cortusoides. 



This section is named after the longest-known species of it — 

 P. cortusoides, Linn. — but that species is not Japanese. All the 

 Japanese plants named P. cortusoides, Linn., are, as Mr. Takeda 

 shows, forms of P. Sieboldii, E. Morren. Only two Japanese species 

 are in this section — P. Sieboldii, E. Morren, and P. kisoana, Miq. ; 

 the latter endemic, the former extending into Transbaikalia. 



Both of them have been long in cultivation in Japan ; P. Sieboldii 

 only has reached Europe, and a cultivated plant of it was described by 

 E. Morren in 1873 under the specific name it now bears. The plant 

 had been known to European botanists so much earlier as 1838, when 

 Turczaninow gave an account of it under the designation P. cortusoides 

 var. patens, Turcz. Of how long it had been in cultivation before 



