Pinus 1087 



Schiede and Deppe. It grows on the high lands, particularly on the sloping sides of 

 the mountains of Orizaba and Real del Monte. It is also plentiful in Oaxaca, 1 

 at 9000 ft. elevation, on dry, hard, and poor soil, composed of reddish clay, where it 

 is a slender tree, of moderate size, with hard and resinous reddish wood. 



According to Loudon, a single plant was in cultivation at Boyton in 1826. 

 Subsequently, in 1839, cones were sent by Hartweg to the Horticultural Society of 

 London, who distributed the seed, from which many plants were raised. Most of 

 these succumbed in severe winters ; and only a few trees are now living in this 

 country. There are two at Bicton, one 2 of which, measured by Mr. H. Clinton- 

 Baker in 1898, is 60 ft. by 5 ft. 9 in.; the other is 57 ft. by 6 ft. 10 in. At 

 Luscombe Castle, another is about 50 ft. high by 5 ft. 4 in. in girth. A small tree 

 also exists at Fota, which I saw in 1907. (A. H.) 



PINUS RIGIDA, Northern Pitch Pine 



Pinus rigida, Miller, Did. ed. 8, No. 10 (1768); Loudon, Arb. et Frut. Brit. iv. 2239 (1838); 

 Sargent, Silva N. Amer. xi. 115, t. 579 (1897), and Trees N. Amer. 20 (1905); Kent, Veitch's 

 Man. Conifera, 373 (1900); Masters, in Journ. Linn. Soc. {Bot.) xxxv. 599 (1904); Mayr, 

 Fremdland. Wald- u. Parkbdume, 361 (1906); Clinton-Baker, Illust. Com/, i. 49 (1909); 

 Bean, in Gard. Chron. xlv. 178, fig. 75 (1909). 



Pinus Taeda, Linnaeus, var. rigida, Aiton, Hort. Kew, iii. 368 (1789). 



Pinus Taeda, Linnaeus, var. A, Poiret, in Lamarck, Diet. v. 340 (1803). 



A tree, attaining in America 80 ft. in height and 9 ft. in girth. Bark on young 

 stems thin and broken into reddish brown scales, on old trunks an inch thick and 

 deeply and irregularly fissured into broad flat scaly ridges. Young branchlets 

 glabrous, reddish brown, with prominent keeled pulvini. Buds cylindrical or 

 conical, sharp-pointed, \ to f in. long ; scales interlaced and matted together by 

 their white fimbriated edges, their long acuminate brown apices free and spreading. 



Leaves in threes, persistent two years, spreading, 3^ to 4^ in. long, rigid, 

 slightly curved and twisted, serrulate, ending in a callous point, marked on the three 

 faces by numerous stomatic lines ; resin-canals median ; basal sheath f to \ in. long. 



Cones lateral, usually clustered, sub -sessile, spreading, variable in size, 

 averaging 2J in. in length, ovoid, light brown, symmetrical at the base ; scales thin, 

 flat, in. long, f in. wide ; apophysis shining, rhomboidal, with a raised sharp 

 transverse keel, and an elevated dark-coloured umbo, terminating in a recurved 

 slender prickle. Seed triangular, with a blackish roughened shell, and a pale brown 

 wing, broadest below the middle ; seed with wing about \ in. long. Cotyledons 

 five. The cones often persist on the branches, and even on the stem, for many 

 years, many opening when ripe and letting out the seed, others remaining closed for 

 an indefinite period. Cones are freely produced on very young trees. 



This species is remarkable amongst pines for the frequent occurrence on 

 untouched old stems of adventitious buds, which usually produce branchlets, the 

 shortest of these resembling tufts of leaves arising from the bark, the largest 



1 Cf. Garden and Forest, ix. 102 (1896). 

 * This tree was labelled P. oocarpa. The other was named correctly P. Teocote. 



