Pinus 1065 



in Mexico in company with the type, and is connected with it by intermediate 

 forms. 



2. Var. tenuifolia, Shaw, Pines of Mexico, 20, t. xiii. (1909). 



Pinus tenuifolia, Bentham, PL Hariw. 92 (1842). 



Cones ovate or long-ovate ; basal scales and peduncles persistent on the branch. 

 Hypoderm of the leaves extending from the epiderm to the endoderm, forming 

 partitions across the green tissue.^ Abundant at altitudes with a sub-tropical climate 

 in the western and south-western states of Mexico, and extending southward to 

 north-western Nicaragua. 



According to Shaw, P. pseudosirobus occurs in Mexico at altitudes between 6000 

 and 10,000 ft., where the climate is temperate, with warm days and cool nights. This 

 zone includes the tableland and the slope immediately above it. 



This species, and var. apulcensis, were discovered in 1839 by Hartweg, who 

 sent home in the same year cones and seeds, from which, according to Loudon, 

 numerous plants were raised. Nearly all these have died, as the tree is evidently 

 only suitable for cultivation in districts where the climate is mild,, like Cornwall and 

 southern Ireland. The only specimens which we have found, are two trees in 

 Cornwall. One at Pencarrow, was obtained from Knight and Perry in 1849 ; and 

 measured, in 1906, 47 ft, high, and 5 ft. 8 in. in girth. Mr. Bartlett kindly 

 sent us photographs of this tree, and of several trees of P. Montezumce, and the 

 difference in the bark of the two species is remarkable. That of P. pseudosirobus is 

 smooth, and only slightly furrowed ; whereas in P. MontezumcB, the bark is very 

 rough and scaly. Another, growing at Tregothnan, was measured by Mr. A. B. 

 Jackson as 50 ft. by 6 ft. in 1909. Neither tree has produced cones. 



(A H.) 



PINUS TORREYANA 



Pinus Torreyana, Parry, ex Torrey, in Emory, Bot Hex. Bound. 210, tt. 58, 59 (1858) ; Sargent, Silva 

 N. Amer. xi. 71, «. 557, Sl^ (1897), and Trees N. Amer. 34 (1905); Kent, Veitch's ^««. 

 Conif. 348 (1900); Masters, in Journ. Linn. Sac. (Bot.) xxxv. 602 (1904); Clinton-Baker, 

 Illust. Conif. i. 56 (1909). 



Pinus lophosperma, Lindley, in Gard. Chron. i860, p. 46. 



A tree, attaining 60 ft. in height and 8 ft. in girth, but usually considerably 

 smaller. Bark an inch in thickness, deeply divided irregularly into broad flat scaly 

 ridges. Young branchlets glabrous, glaucous ; become dull grey in the second year 

 Buds cylindric-conic, \ in. long ; scales pale brown, interlaced by their margmal 

 white fimbriae, and with appressed points. ^ 



Leaves* in fives, persistent two years, dark green, 7 to 13 m. long, -^ m. 



1 A very fine tree near the hotel at Bussaco. Portugal, which Elwes measured in April 1909, 9° ft. in height and 9 ft. in 

 girth, is probably this variety ; but in the absence of cones, the identification is uncertain. 



2 On young plants the leaves are frequently in clusters of three and four. ^ 



