THE PINE SUB-FAMILY. 143 



the Rio Grande to the Cajon Pass of the Sierra Nevada. 

 How far it occurs to the southward, we have not been 

 able to ascertain." 



Dr. Bigelow, in his description of this tree, says : " It 

 seldom grows large. A little west of the San Francisco 

 mountain, and at the Cajon, it is found from 40 to 50 feet 

 high, but further east it seldom attains more than 24. Its 

 usual height, however, is about 30 feet. The nut is sweet 

 and edible, about the size of a hazel-nut." 



We are pleased to add that young plants of this species 

 have stood out in the open air near Philadelphia, for the 

 three past winters, without injury. The leaves are quite 

 frequently in pairs. 



47. P. Chihuahuana, Wislizenus. Is a tree of some 

 30 or 35 feet in height, and is found on the mountains of 

 Northern Mexico at an elevation of 7,000 feet. 



48. P. insignis, Douglas. OREGON PITCH PINE. 

 This is one of the most beautiful species belonging to the 

 family, and lives in the open air one or two winters if 

 moderately mild. In England it is quite hardy and 

 highly valued. It is a native of California, growing from 

 80 to 100 feet high. 



49. P. insularis, Endlicher. Is the Timor Pine from 

 the Philippine Islands and Island of Timor. Its long, 

 slender, dark-green leaves, are very beautiful, but its spe- 

 cific character remains somewhat in obscurity. 



50. P, Llaveana, Seheide. Syn. P. osteosperma, 

 Wislizenus ; and P. cembroides, Zuccarini. Belongs to 

 the large edible-seeded class of pines, of which the P. 

 Pinea is the type. It is a native of the barren and sterile 

 hills of Mexico, where it forms a low, spreading tree 

 scarcely ever exceeding 20 feet in height. It is frequently 

 found in cultivation for the value of its fruit. Tender here. 



