CUPEEBSUS LAW60NUNA. 231 



when shed, the ground beneath appears covered with yellow dust ; 

 this species is thence very fertile, and is covered with cones even 

 in its young state. 



Habitat. — California, in the neighbourhood of Monterey. 



Introduced in 1846 by the Horticultural Society of London, through 

 their collector, Hartweg, and named in compliment to J. R. Gowen, 

 Esq., at that time Secretary of the Society. 



Oupressus Knightiana. — A tall tree of elegant habit, with 

 drooping, feathery, and fern-like branchlets, and well distinguished 

 by the glaucous bluish hue of its foliage. 



Habitat. — The mountains of Mexico, at a considerable elevation. 



Introduced about 1840J probably by Hartweg. 



Cupressus Knightiana is the hardiest of the Mexican Cypresses, and the 

 only one from that country available for planting in England, but it 

 requires a sheltered situation. It was named in compliment to Mr. 

 Knight, of the firm of Knight and Perry, our predecessors at the Eoyal 

 Exotic Nursery, Chelsea. It has now become quite rare. 



Oupressus Lawsoniana. — A tall tree, attaining a height of 

 upwards of 100 feet. The trunk is slender in proportion to the height, 

 not exceeding 2 feet in. diameter near the base ; the branches short 

 and spreading, the branchlets pendulous, fern-like, and feathery, the 

 leader pendulous like that of the Deodar, and the foliage deep 

 glaucous green, which, in the early spring, is relieved by bright 

 crimson male catkins that are terminal, numerous, and produced 

 while the trees are still young. The cones or strobiles are about 

 the size of large peas, and are borne in great profusion. 



Habitat. — Northern California, on the Shasta Mountains; in the 

 neighbourhood of Port Orford, and in other parts of Oregon. 



Introduced in 1854 by Mr. William Murray, who sent seeds to 

 Messrs. Lawson, of Edinburgh. 



From the numerous varieties of Oupressus 'Lawsoniana in cultiva- 

 tion, the following are selected for their effectiveness as decorative 

 plants : — 



Oupressus Lawsoniana alba spica.— In this variety the terminal 

 growth and tips of the branchlets are creamy-white. It is a plant 

 of rapid growth, less dense than the common form. 



