of the Botanic Garden at Berlin. 309 



Maclum stands the open air. 



BroLissonet/a usually dies from severe cold, yet sometinries stands out, and 

 flowers well. Shrubby. 



iliorus tatarica, Morettz, multicaiilis, macrophylla, rubra, and nigra, stand 

 our climate, and suffer little from frost; most of them being considerable trees. 



FiCM's, requires protection. 



Planera aquatica (Gmeiinz) 18 ft. high, grows rapidly for a few years. P. 

 Richards is tender. 



?7'lmus. A great many species and varieties, under an infinite number of 

 names, attain the height of trees in a few years. U. campestris, suberosa, 

 and effusa, in ten years, have attained the height of 25 ft. ; and U. ietuloides, 

 gigantea, pyramidalis, alba, americana, fulva, and pendula, grow, under any 

 circumstances, to beautiful trees. U. pv\xmib\\& is killed by the frost, at 8° or 

 10° of Reaumur [from 9° to 14° Fahr.]. 



Celtis australis, occidentalis, TournefortM, and sinensis, are 25 ft. high, 

 after having been fifteen years planted; but they suffer from the cold and 

 moisture. 



Juglans nigra and cinerea grow rapidly. In forty years, their stems mea- 

 sure 2 ft, in diameter ; and trees twenty-five years old are, sometimes, even 

 as large. J'./i-axinifolia and pterocarpa are more tender, and of less rapid 

 growth. 



Carya olivaeformis, amara, and falcata, are now becoming very fine trees; but 

 are tender when young. 



(Salix, Many of the species, from cultivation, are of a height and size resembling 

 trees, attaining, in twenty years, the height of 50 ft. or 60 ft. (S.alba, triandra, 

 Russelh'awa, and Meyen'«w«, are from 2 ft. to 3 ft. in diameter. 



Populus canescens, alba, tremula, nigra, and monilifera, in ten years, acquire 

 the height of forest trees ; and, in twenty years, are 70 ft. high, with trunks 



3 ft in diameter. P. grandidentata, trifida, candicans, heterophylla, and angu- 

 lata, (the two last when young,) grew rapidly, but are not so strong as those 

 before mentioned. 



J'lnus incana is a beautiful tree, which, in ten or fifteen years, attains the 

 height and breadth of a forest tree. A. cordata suffers in severe winters, but 

 is seldom killed. A. undulata and serrulata are shrubs. 



J5etula nigra, populifolia, papyrifera, lenta, carpinifolia, and excelsa, twenty 

 years planted, are from 30 ft. to 40 ft. high : the stems of some are 1 ft. 4 in. 

 in diameter. The small shrubs are from 6 ft. to 8 ft. high. B. dahurica, pon- 

 tica, and excelsa, are moderately sized trees. 



Carpinus orientalis and americana are about 25 ft high. 



O'strya virglnica, the same. 



Corylus Colurna, a considerable tree ; twelve years planted, with a trunk 



4 in. in diameter. 



Qu6'cus. The Americnn oaks have been planted here since 1804, and they 

 thrive on a bad soil. Q. coccinea, palustris, rubra palustris, tinctoria, and 

 discolor, are from 25 ft. to 30 ft. high. The strongest of them measure 1 ft., 

 and often more, across one of the branches. Many of the species have been 

 retarded in their growth by the frost. Q. flicifolia is a shrub : the southern 

 and evergreen oaks do not stand in the open air; the attempt having often 

 been made unsuccessfully. 



i^agus, twenty years planted, is from 15 ft. to 18 ft. high. F. sylvatica pur- 

 piirea, thirty years planted, is 25 ft. high. F. sylvatica asplenifolia, ^'uercifolia, 

 and crlspa, are only small trees. 



Castanea vesca, in the neighbourhood of Berlin, is sixty years old, and 30 ft. 

 high, with a trunk 2 ft. in diameter. C. pumila and americana are shrubs. 



Platanus. The species of Platanus, especially the P. acerifolia and occi- 

 dentalis, grow to strong and beautiful trees, from 60 ft. to 70 ft. in height. P. 

 orientalis and cuneata are tender, and are killed by the frost. 



Liquidambar, only one specimen, 20 ft. high, which died from cold in 1803. 

 Vol. XII. — No. 75. a a 



