21 



Picea rubens Sargent. Red Spruce. 



PlCEA RUBRA Diet. 

 Range.— Nova Scotia to North Carolina and Tennessee. Range imperfectly known. 



Names in use. — Red Spruce; Yellow Spruce (1ST. Y.); North Ameri- 

 can Red Spruce (foreign lit.). 



VARIETIES DISTINGUISHED IN CULTIVATION. 



I Picea rubens coerulea (Loud.) nom. nov. 



Picea rubra ccerulea (Loud.) Forbes. 

 Picea rubens pendula (Carr.) nom. nov. 



Picea rubra pendula Carr. 

 Picea rubens gracilis (Knight) nom. nov. 



Picea rubra gracilis (Knight) Carr. 



Picea canadensis (Mill.) B. S. P. White Spruce. 



Picea alba Liuk. 



Rangk. — Newfoundland to Hudson Bay and northwestward to Alaska; southward 

 to northern New York, Michigan, Wisconsin, Minnesota, South Dakota, Montana, 

 and British Columbia. 



Names in use.— White Spruce (Vt., N. H., Mass., N. Y., Wis., Mich., 

 Minn., Out.); Single Spruce (Me., Vt., Minn.); Bog Spruce (New Eng.); 

 Skunk Spruce (Wis., Me., New Eng., Out.); Cat Spruce (Me., New 

 Eng.); Spruce (Vt.), Pine (Hudson Bay); Double Spruce (Vt.). 



varieties distinguished in cultivation. 

 Picea canadensis glauca (Moench.) Sudw. 

 Picea canadensis acutissima (Beissn.) Sudw. 

 Picea canadensis compressa (Beissn.) Sudw. 

 Picea canadensis nana (Loud.) Sudw. 

 Picea canadensis nana glaucifolia Sudw. 

 Picea canadensis echinoformis (Carr.) Sudw. 

 Picea canadensis compacta gracilis (Beissn.) Sudw. 

 Picea canadensis compressiformis Sudw. 

 Picea canadensis nutans Sudw. 

 Picea canadensis aurea (Beissn.) Sudw. 



Picea engelmanni 1 Engelm. Engelmann Spruce. 



Range. — Northern Arizona and through the Rocky Mountain region to British 

 Columbia. 



Names in use.— Engelmann's Spruce (Utah) ; Balsam (Utah) ; White 

 Spruce (Oreg., Colo., Utah, Idaho); White Pine (Idaho); Mountain 

 Spruce (Mont.); Arizona Spruce (Cal. lit.). 



varieties distinguished in cultivation. 

 Picea engelmanni griseifolia Sudw. 

 Picea engelmanni argyrophylla Sudw. 

 Picea engelmanni minutifolia Sudw. 



Picea parryana (Andre) Parry. Blue Spruce. 



Picea pungens Engelm. 



Range. — Central Rocky Mountain region— Colorado, Utah, and Wyoming. 



Names in use.— Parry's Spruce (Utah); Blue Spruce (Colo.); Spruce; 

 Balsam (Colo., Utah); White Spruce (Utah, Colo.); Silver Spruce 

 (Colo.); Colorado Blue Spruce (Colo.); Prickly Spruce (lit.) 



^rof. J. G. Lemmon has recently descrihed the following as distinct from the 

 Engelmann Spruce: Picea columb tana Lemm. (= P. engelmanni Engelm. in part). 



