from June 9.S. to August 16. 1840. 397 



P. nivea Fischer is P. alba var. Arb. Brit. 



P. grse^ca H. P. is P. tremuloides Arb. Brit. 



P. Hudsonidna Mich, strongly resembles P. nigra Arb. Brit,, and may possibly 

 be only a variety of it, in which opinion Michaux concurs. 



P. virginiana, the Peuplier Suisse, is the P. monilitera Arb. Brit. ; the male 

 plant is distinguished from the female by the petioles of the leaves being 

 red. 



P. canadensis is P. monilifera var. Arb. Brit. 



P. ontariensis Desf. is P. candicans Arb. Brit. 



P. candicans //. P. is P. balsamlfera A7-b. Brit. 



P. suaveolens Fischer is P. balsamifera suaveolens Arb. Brit. 



i?etula pontica H. P. is B. papyracea H. K., and Arb. Brit. 



B. z^rticaefolia is B. alba z^rticffifolia Arb. Brit. 



B. dalecarlica is B. alba dalecarlica Arb. Brit. 



A'Xnus communis H, P. is A. glutinosa Gcert. and Arb. Brit. 



Quercus crinita Bosc is Q. Cerris Arb, Brit. 



Q. prasina Bosc is Q. sessiliflora Arb. Brit., with leaves glaucous, small, and 

 on long petioles. 



Q: Tauzin Bosc is Q. Prinos Arb. Brit. 



Q. Turnerz, a specimen 12 ft. high. 



Q. Rbhur Willd. is Q. pedunculata Arb. Brit. 



Platanus orientalis is P. occidentalis Arb. Brit. 



Pinus Banksia?za is P. sylvestris Arb. Brit. 



P. mitis Mich, is P. inops Arb. Brit. 



P. inops Mich, is P. serotina Arb. Brit. 



P. excelsa is P. longifolia Arb, Brit, 



It will be observed that among the foregoing names affixed to the plants in 



the Paris garden, the greater number are legitimate synonymes, though there 



are some, as for example, the six last, which are names erroneousl}' applied. 

 M. Camuset is the c/ie/'of that department of the Jardin des Plantes which 



may be called the nursery, as his duty is to propagate all the more hardy 



species of trees and shrubs by seeds or otherwise, for distribution among the 



provincial gardens, and for making exchanges with foreigners. Having been 



nearly fifty years in the garden, he has had great experience in raising trees 



and shrubs from seed, and knows the origin and history of many alleged 



species and varieties. He has raised a number of seedling robinias, some of 



which are in Mr. Rivers's catalogue, and chiefly from the seeds of the original 



tree brought to Europe and planted by Vespasian Robin in this garden in 



1635. 



The following memorandums were chiefly made on the spot : — 



Clematis cylindrica Camuzw, raised by M. Camuset in 1838, differs from the 

 species, in having bell-shaped purple flowers, whereas in the species they 

 are of a somewhat bluish purple. 



Mahonk ^quifolium is as hardy in the climate of Paris as the common box ; 

 and is therefore of great value, there being so few evergreens which will 

 stand through the winter in that climate. 



J^cer saccharinum var. nigrum differs from the species in the leaves not being 

 in the slightest degree velvety beneath ; it is exceedingly difficult to pro- 

 pagate, and unites with difficulty when inarched. 



A. riibrum grafted on A. Pseudo-Platanus invariably forms a bulging protu- 

 berance immediately above the graft. Seeds from an old plant of A. 

 monspessulanum have produced A. creticum, A. coriaceum. A, hetero- 

 phjUum, and other varieties. M. Camuset pointed out plants containing 

 leaves with long petioles and five lobes, and other leaves with short 

 petioles and three lobes, on the same branch, some of which we brought 

 with us, as a proof that the Montpelier and Cretan maples are essentially 

 the same species. He also showed us on the same seedling, from the tree 

 mentioned, coriaceous leaves l|in. broad, and others not half an inch 

 broad. From the same seedlings, there were some plants with scarcely 



