C. NAUSEOSUS. 233 



Table 23.— Variation in certain subspeeies of Chrysothamnua naua«)«u«— Continued. 



' Except where otherwise mentioned the plants selected for measurement are normal and fairly representative of the sub- 

 species to which they are assigned. The Hgure given for corolla and style characters is the average of a number of measure- 

 ments, but the fluctuation usually is slight on any given plant. The involucre is more variable. Usually several of the 

 larger and fullv mature involucres were selected and these averaged. The measurement is from the base of the lowest row 

 of bracts to a point on a level with the top of the longest bract, assuming the involucre to be in a verUcal position. Thus 

 no allowance was made for the slope of the sides. . • ■ oo 



> Minor variaUon 68, C. pulcherrimus Nelson. ' Type of C. orthophyllus Greene, minor vanation 63. 



» Minor variation 58, with wide and thick leaves. • Minor variation 67, C. plattensxs Greene. 



« Minor variation 57, with pubescence covering the ' Type of C. anguslus Greene, minor vanation 21. 



involucres. 



