PINETUM DANICUM. 



349 



very much tlie appearance of the Weymouth Pine (P. Strohus), found 

 particularly on the higher points of the Combre Mountains, in the Sierra 

 of Oaxaca, and on Mount Palado, or Bald Mountain. It is also very 

 common on the mountains of Quezaltenango, at an elevation of 8,500 

 feet, and on the neighbouring mountain of Santa Maria, where it 

 is called " Tablas " by the inhabitants, and "Ayacahuite" by the 

 Mexicans. It is also found on the higher peaks of the mountains 

 about Cosiquiriachi, in ISTorthern Mexico, at an elevation of 7,000 or 

 8,000 feet. Timber white and soft. 



A plant of this species has done well out of doors slightly covered 

 with straw and Spruce branches. I possess remarkably fine cones 

 brought home from Mexico by the Danish Professor Liebmann. 



P. Balfouriana, Jeffrey in Engelmann's Rev. of the Genus Pinus, 

 &c. 179 ; Rep. Oregon Exped. i. t. 3, f . 1 ; Gord. Pinet. 217, and ed. 2, 

 293 ; Henk. and Hochst. N'adelh. 109 ; Bolander in Proc. Calif. 

 Acad. iii. 318 ; Carr. Tr. Gen. Conif. ed. 2, 425 ; Nelson, Pinac. 

 104 ; Hoopes, Evergreens, 149 ; Fowler in Lond. Gard. Chron. 1872, 

 973 ; Yasey, Cat. Forest Trees, 32 ; Engelm. in Trans. St. Louis 

 Acad. iv. 179 ; Bot. Calif, ii. 125 ; Veitch, Man. Conif. 175 ; Law- 

 son, Pinet. Brit. i. 11, f. 1-5. 



Introduced from North California in 1852 by John Jeffrey ; and, 

 many years afterwards, reintroduced under the name of Pinus aristatay 

 which is now regarded as a variety of P. Balfouriana (Veitch, 

 <^ Manual of Conifers," 1891). 



Habitat. — California, Scott's Mountain, Siskiyou County (Jeffrey, 

 Lemmon), Mount Witney, and about the headwaters of King and 

 Kern rivers. 



The specific name Balfouriana was given by Mr. Murray in 

 compliment to the late Professor of Botany in the University of 

 Edinburgh. 



The young specimens growing in British gardens under the name 

 of Pinus aristata are somewhat different from those regarded as the 

 true P. Balfouriana. They are more robust, and of more rapid 

 growth ; the leaves are longer, stouter, duller in colour, and much less 

 glaucous on the inner faces. The merits of P. Balfouriana as a 

 decorative tree have yet to be proved. 



A small tree, 50 to 60 feet in height, with a trunk 2 to 3 feet in 

 diameter ; dry, gravelly slopes and ridges, forming upon Scott's 

 Mountain a broad belt of open forest growth at an elevation of 5,000 

 to 8,000 feet (C. S. Sargent). 



Hardy. 



P. B. aristata, Engelm. 



This very singular variety is a truly alpine Conifer, constituting the 

 highest belts of timber on the peaks of the Colorado Mountains in 

 California, where on sheltered slopes, at elevations between 9,000 and 

 10,000 feet, it forms a trunk over 3 feet in diameter, covered with a 



