932 



ARBORETUM ET FRUTICETUM BIUTANNICUM. 



1833. P. pondcrosa. 



The plants, when of ten or twelve 

 years' growth, are remarkable for the 

 twisted appearance of their branches 

 which are in regular verticillate whorls. 

 The timber of full-grown trees is said 

 to be so heavy as almost to sink in 

 water. The species is found to be 

 quite hardy, and of rapid growth, both 

 in the climate of London and of Edin- 

 burgh. P. ponderosa is a native of 

 the north-west coast of North Ame- 

 rica, on the banks of the Spokan and 

 Flathead rivers, and on the Kettle 

 Falls of the Columbia, abundantly. 

 It was discovered by Douglas, and 

 sent by him to the Horticultural So- 

 ciety in 1826. A number of plants 

 were raised from seeds in that year, 

 and distributed : the largest of those 

 we believe to be that in the Hor- 

 ticultural Society's Garden. The 

 tree at Dropmore was, in 1837, 9 ft. 

 high. 



f 23. P. SimxlA^NA Douglas. Sabine's, or the great prickly-coned, Pine. 



Identification. Lamb. Pin., ed. 2., 2. t. 80. ; Lawson's Manual, p. 353. ; Pin Wob., p. 63. 

 Engravings. Lamb. Pin., ed. 2., 2. t. 80. ; Pin. Wob., t. 23. and 24. ; our fig. 1837. to our usual 



scale; and ,/tes. 1834. to 1838. of the natural size, from the tree in the Horticultural Society's 



Garden, and Lambert. 



Spec. Char., $c. Leaves in 

 threes, very long. Cones 

 ovate, echinate, very large. 

 Scales long, awl-shaped, 

 incurved, and spiny at the 

 apex. (Lamb. Pin!) Buds, 



on the tree in 



the Horticul- 

 tural Society's 



Garden (see 



fig. 1834.), 



nearly 1 inch 



long, and f in. 



broad; convex 



on the sides, 



imbricated, but 



not covered 



with resin. 



Leaves from 

 10 in. to I ft. in length ; 

 glaucous in every stage of 

 their growth, flexuose ; and, 

 when full-grown, partly 

 bent downwards, as those 

 shown in fig. 1837. Sheaths 

 above 1 in. in length, mem- 

 branaceous, ash-brown, 

 shining, and nearly entire 

 at the top, with numerous 

 rings. Scales of the cones, 

 in the specimens sent home 



1835. l>, P. Sabinitina ; a, c, P. Coulteri. 



