APPENDIX. 113 



FOUR NEW SPECIES. 



The following forms have lately been separated from 

 certain species and given specific rank. 



Picea Columbiana, Lemmon.* Small sub-alpine 

 trees of the upper Columbian region on highest mountains 

 75-100 feet high, narrowly pyramidal or pinnacled in outline; 

 bark light colored, thin, hard, and flaky; branches dimin- 

 ishing in length to the spire-formed top, the upper ones 

 bearing the most of the small, 1-1 J inch, narrow, elliptical, 

 yellowish or brownish cones; scales obovate, thin, edges 

 wrinkled, scale bracts small, acute 3-4 millimeters long. 

 Recently separated from the typical Englemann's Spruce, 

 a much larger tree with different characters and inhabiting 

 more southern regions. 



Abies Arizona, Merriam.f Very slender, sub- 

 alpine trees but a few inches in diameter and 20-40 feet in 

 height, found on the high slopes of the San Francisco and 

 neighboring peaks of Northern Arizona. Bark thin, soft, 

 and corky; cones very small, 2-3 inches long, foliage light 

 and thin. By some botanists considered as a southern and 

 much modified form of Abies lasiocarpa Nutt. but abun- 

 dantly distinct. 



Juniperus scopulorum, Sargent. This beautiful 

 weeping Juniper sparsely decorating the gulches and ravines 

 of northern Arizona and New Mexico, thence ranging north- 

 ward through Utah and Colorado to southern Wyoming, 

 becomes a small tree with thick bark deeply furrowed 

 longitudinally, sap-wood white, heart-wood bright red. 



* Garden & Forest, May 12, 1897 and Sierra Club Bulletin 3, 1898. 

 fProc. Biol. Soc. Washington Vol. X., Nov. 3, 1896. 



