ECONOMIC WOODS OF THE UNITED STATES 83 



a 3 Color very light. Texture very fine. Odor rather 

 mild; unpleasant. Ray tracheids common in low rays. 

 Yellow Cedar, Yellow or Sitka Cypress, Chamcecy- 

 paris nootkatensis Spach. (P). 



b 3 Color deep yellow, sometimes brownish. Texture 

 moderately fine. Odor very pungent. Ray tra- 

 cheids rarely present. Port Orford Cedar, Lawson's 

 Cypress, Oregon Cedar, C. lawsoniana Pari. (P). 



b 2 Color varying from light brown to purple, never 

 yellow. Late wood distinct; often conspicuous. 

 Odor variable, more or less pronounced, but not 

 pungent. Taste not unpleasant. 

 a 3 Wood firm and compact, cutting smoothly across 

 the grain. Moderate contrast between seasonal 

 growths; transition gradual. Demarcation be- 

 tween heartwood and sapwood usually distinct. 

 Red Cedar Group. 



a 4 Color pale reddish-brown or roseate, uniform; 

 rays brown. Odor pronounced. Taste spicy. 

 Resin cells fairly numerous, zonate, mostly in 

 late wood; usually not visible with lens. Tex- 

 ture rather fine, uniform. Growth rings regu- 

 lar; late wood fairly conspicuous. Heartwood 

 often " pecky " as in Taxodium. Sp. gr. 

 .34-.4G, mostly between .35 and .40. Rays often 

 gummy; 1-8, mostly 3-5, cells high; ray tracheids absent. 

 Incense Cedar, Libocedrus decurrens Torr. (P). 26 



b 4 Color purple or deep red, soon becoming dull 

 brown upon exposure to sunlight; often streaked 

 with white; rays deep red or purple. Odor and 

 taste characteristic but mild; not sweetish or 

 spicy. Resin cells very numerous, deeply colored, 

 mostly zonate (Plate II, Fig. 3) in concentric 

 lines visible with lens and often without it. 

 Rays gummy, 1-20 cells high, very irregular. 

 Texture very fine and uniform. Growth rings 

 often very irregular in width and outline, fre- 

 quently eccentric; summer wood not conspic- 

 uous, sometimes doubled or trebled. Wood 



