Jbr the Culture of Hardy Plants. 421 



as well as on those who study botany as a branch of natural 

 history. 



The extent of Trelowarren botanic garden is a square of 

 nearly an acre, lying direct east and west, surrounded by a 

 brick wall 1 6 ft. high. On the south aspect of this wall will 

 be a range of glass for the culture of the more tender exotics. 

 One half of the garden will be illustrative of the Linnean 

 arrangement; the other half, of the natural arrangement of 

 Jussieu, as adopted by Decandolle. Each arrangement is 

 surrounded by a border of 5 ft. in width, appropriated to the 

 flowering of the more beautiful herbaceous plants, including 

 annuals. Through the centre of the garden there is a gravel 

 walk, in which, in the middle of the garden, there is a 

 temple partaking of the character of a botanical library with 

 its appurtenances, as hortus siccus, &c. Six feet from each 

 wall is a gravel walk, cutting at right angles the centre walk, 

 which affords three additional distinct departments ; the first 

 for medicinal plants ; the second for agricultural purposes ; 

 the third for the family of Gramineae. 



With regard to the detail of the Linnean department, care 

 has been taken to limit the number of species of the more 

 numerous genera to six, with the exception of Solid ago, 

 ^4'ster, Helianthus, Chicus, Carduus, and some others, where 

 illustrations are necessary to decide the approximation of one 

 species in relation to another of the same genus. By this 

 limitation a greater number of genera is obtained. The de- 

 partment is divided into thirty-six beds, each 2\ ft. wide, with 

 an alley 1^ ft. wide edged with box and gravelled. The 

 class Monandria Monogynia commences with the genus Z?li- 

 tum, with its species; proceeds thus on through the whole 

 system as far as Syngenesia Polygamia Necessaria, embrac- 

 ing every genus in which species are found suitable for bo- 

 tanical purposes. This affords 1000 species to develope the 

 sexual system of plants. 



With regard to the natural arrangement, the ground plan 

 is the same as that for the Linnean, which, consequently, will 

 admit of the introduction of the same number of species ; but 

 varying these, unless where the introduction of the tribe ren- 

 ders this impracticable. 



The arrangement of the Gramineae contains at present 200 

 species, but sufficiency of room still remains for the introduc- 

 tion of a larger collection, which will be immediately effected. 



It is likewise in contemplation to add to this garden another 

 portion of natural history, viz. an arrangement of earths, in 

 some way approaching to that in the Jardin des Plantes at 

 Paris. 



e e 3 



