346 PARKS AND PLEASURE-GROUNDS. 



in reg-iilar whorls ; of 129 and 132, densely set. The color of 125 is a 

 silvery green ; of 124, glaucous; of 115, 116, 123, light-green ; of 121 

 and 129, vivid greeii ; and of 126, 128, 130, dark green. The length of 

 the leaves varies, generally from 2 to 8 inclies, but in 124, 125, 128, 130, 

 it ranges from 10 to 12 inches. P. insignis, Sabiniana, macrocarpa, and 

 ponderosa are of very rapid growth. P. Ttxda, radiata, and ttiheradata 

 stand the sea-breeze well in tlieir native countries, and are expected to 

 prove acquisitions to parks near the sea-coast in the United Kingdom. 

 P. Sabiniana requires a rich loam ; Gerardiana thrives among rocks 

 and crags ; Tccda in very barren ground, but attains its greatest perfec- 

 tion in swampy soils. P. insignis and rigida afford effective shelter. 

 The tivaher oi P. rigida is valuable, and that of P. ponderosa is expected 

 to prove so. The light silvery color of P. Sabiniana and macrocarpa 

 will be as marked in ornamental scenery, during the whole year, as the 

 summer garb of the Huntingdon willow ; and the light green of P. Teo- 

 cote, patula, and Gerardiana, as tliat of the summer greens of the decid- 

 uous trees. 



PiNUS. — Group 10. Pinaster. 



(Leaves in pairs, rarely in threes.) 



137. P. pungens, 100 ft. 157. P. Altai ca. 



138. P. muricata, 40 ft. , 158. P. globosa. 



139. P. inops, 40-50 ft. 159. P. tortuosa. 



140. P. mitis, 50-00 ft. *1G0. P. densiflora, 40 ft. 



141. P. variabilis, 30-40 ft. 161. P. Massoniana, s h. 



142. P. Pinaster, 50-60 ft *162. P. Merkusii, 100 ft. 



143. P. Escarcna. 163. P. Banksiana, 40 ft. 



144. P. Lemoniana. 164. P. resinosa, 80 ft. 



145. P. niinor. 165. P. Laricio, 100-150 ft. 



146. P. variegata. 106. P. Calabrica. 



147. P. Pumilio, 5-10 ft: 167. P. Caramanica. 



148. P. uncinata, 30-50 ft. 16b. P. subviridis. 



Mugho, Lindl. 169. P. pygmrea. 



149. p. rotundata.' 170. P. Austriaca, 100-120 ft. 



150. P. humilis. 171. P. Pyrenaica, 60-70 ft. 



151. P. obliqua. 172. P. Pallasiana, 60-80 ft. 



152. P. sylvestris, 40-80 ft. Taurica, Hort. 



153. r. rubra, 60-70 ft. 173. P. Halapensis, h? 30-40 ft. 



154. P. argentea. 174. P. maratima, h? 



155. P. sylvestris monophylla. 175. P. Brutea, A.? 



156. P. Haganoviensis. 



All the trees of this group have more or less pyramidal forms when 

 young ; many of them have, or approach to, the form of a rounded 



