I860.] GENERA PLANTARUM. 175 



PLATANUS ACERIFOLIA, 

 Commonly called the Occidental Plane. 



(From the Grardeners' Chronicle/ January 21, 1860.) 



1. P. acerifolia palmata ; much palmatecl, with leaves more 

 pubescent than those of P. orientalis ; growth more erect. 



2. P. acerifolia palmata superba ; with much larger leaves 

 than No. 2, very deeply palmated growth, more spreading, very 

 vigorous. 



3. P. acerifolia pyramidata ; leaves nearly entire ; habit erect, 

 compact, and very hardy and vigorous; likely to form a noble 

 tree. 



4. P. acerifolia grandifolia ; leaves slightly lobed like the type, 

 but of much larger growth ; erect and vigorous. 



It does not seem probable that the Maple-leaved Plane can 

 be a hybrid between the Oriental and Occidental Planes, because 

 the latter has never made any progress in this country towards 

 a seed-bearing state. Loudon gives Willdenow as his authority 

 for its name of acerifolia ; and an eminent botanist has suggested 

 that it may be a species or variety peculiar to the south of Europe, 

 perhaps Spain, as the name of P. hispanica given to a variety 

 almost identical with it would seem to justif3^ I have recently 

 received from France a Plane under the name of Platanus ma- 

 crophylla. This appears to me to be the variety of P. aceri- 

 folia called by Miller and Loudon P. hispanica, as its leaves are 

 slightly larger than those of P. acerifolia, and perhaps more 

 deeply lobed, but to a very trifling extent; in short, it agrees 

 with Miller's description of the Spanish Plane-tree. — T. Rivers. 



'GENEKA PLANTARUM.' 



(From the ' Gardeners' Chronicle,' March 3, 1860.) 



We are able to announce the early appearance of a new 

 'Genera Plantarum,' the joint production of Dr. Hooker and 

 Mr. Beutham, than wdiom no more able botanists exist at the 

 present day. It will be written in Latin, so as to be readable 

 in all countries, and will contain the essential characters of every 



