973 



ARBORETUM ET FRUTICETUM BRITANNICUM. 



roundish. Buds, on young trees (see Jig. 1821.), from ^ in. to fin. 

 long, -, in. broad, pointed, brown, and covered with resin ; on the 

 full-grown trees at Dropmore as in fig. 1822. Leaves (see fig. 

 1823.) from 3 in. to 4J in. long; sheath fin. long, white at first, 

 and afterwards becoming darker, but scarcely black. Cones from 

 2^ in. to 3 in. long, and from l^in. to l^in. broad; scales 1^ in. 

 long, terminating in depressed quadrilateral pyramids, ending in a 

 prickle, pointing outwards. Seed little more than -J in. long ; but, 

 with the wing, from fin. to -|in. long. Cotyledons, ?. A large tree. 

 New England to Virginia ; in light, friable, and sandy soils. Height 

 70ft. to 80 ft. Introduced in 1759. It flowers in May, and the 

 l ' cones are produced in the autumn of the second year. 

 Variety. According to Mr. Lambert, P. T. alopecuroidea Ait. is a variety 



of P. rigida, characterised by its much shorter and stouter leaves, and its 



ovate-oblong, much narrower, and aggregated cones. (Lamb. Pin., ed. 2., 



no. 17.) We have, however, 



placed it under P. serotina. 



The pitch pine, in America, 

 Michaux informs us, varies, ac- 

 cording to soil and situation, 

 from 12 or 15 feet to 70 or 80 

 feet in height. " The buds are 

 always resinous ; and its triple 

 leaves vary in length from l|in. 

 to 7 in. according to the degree 

 of moisture in the soil. The 



1822. P. rigida. 



male catkins are 1 in. long, 



straight, and winged, like those 



of the pond pine (P. serotina). 



The size of the cones depends 



on the nature of the soil, and 



varies from less than 1 in. to 



more than 3 in. in length : they 



are of a pyramidal shape, and 



each scale is pointed with an acute prickle of about ^ in. long. Whenever 



these trees grow in masses, the cones are dispersed singly over the branches ; 



and they shed their seeds the first autumn after they are mature ; but, on 



