WOOTON" AND STANDLEY FLORA OF NEW MEXICO. 661 



Bracts abruptly acuminate. 



Tall shrub, 1 meter high or more; leaves narrowly 



elliptic 8. C. linifolius. 



Low plants, 20 to 40 cm. high; leaves linear or fili- 

 form. 

 Leaves linear; heads long-pedunculate, sub- 

 tended by very short bracts 9. C. greenei. 



Leaves filiform, heads short-pedunculate or 



sessile, subtended by long bracts 10. C. filifolius. 



Plants tomentose, at least on the young branches and in the 

 axils of the leaves. 



Bracts long-acuminate, with spreading tips 11. C. newberryi. 



Bracts obtuse or acute, not acuminate, appressed. 

 Branches permanently white-tomentose. 



Plants tall, about 1 meter high, with erect 



branches; leaves permanently tomentose. 12. C. latisquameus. 

 Plants low, 30 cm. or less, with spreading 



branches; leaves soon glabrate 13. C. formosus. 



Branches and leaves soon glabrate or at least the 

 branches never permanently tomentose. 

 Leaves permanently tomentose on both sur- 

 faces 14. C. pulcherrimw . 



Leaves glabrate in age. 



Bracts glabrous; lobes of the corolla spread- 

 ing in age; plants much branched... 15. C. graveolens. 

 Bracts villous-ciliate; lobes of the corolla 



erect; plants sparingly branched 16. C. confirm. 



1. Chrysothamnus bigelovii (A. Gray) Greene, Erythea 3: 102. 1904. 

 Linosyris bigelovii A. Gray, U. S. Rep. Expl. Miss. Pacif. 4: 98. 1856. 

 Bigelovia bigelovii A. Gray, Proc. Amer. Acad. 8: 642. 1873. 



Type locality: " Hills and arroyos, Cienegella, above Albuquerque," New Mexico. 

 Type collected by Bigelow in 1853. 



Range: Southern Colorado and northern New Mexico. 



New Mexico: Carrizo Mountains; Tunitcha Mountains; Farmington; Stinking 

 Lake; Laguna; Zuni Valley; Moreno Valley; Pecos; Horse Camp; Clark; Embudo; 

 Albuquerque; Santa Fe; San Augustine Plains. Dry plains and hills, in the Upper 

 Sonoran Zone. 



2. Chrysothamnus vaseyi (A. Gray) Greene, Erythea 3: 96. 1894. 

 Bigelovia vaseyi A. Gray, Proc. Amer. Acad. 12: 58. 1876. 



Type locality: Middle Park, Colorado. 

 Range: Wyoming and Utah to Colorado and New Mexico. 



New Mexico: Dulce; Stinking Lake; Moreno Valley; Chama. Low hills and val- 

 leys, in the Upper Sonoran and lower part of the Transition zones 



3. Chrysothamnus depressus Nutt. Journ. Acad. Phila. II. 1: 171. 1847. 

 Bigelovia depressa A. Cray, Proc. Amer. Acad. 8: 643. 1873. 



TYPE locality: " In the Sierra and Upper California." 

 Range: Colorado to northern New Mexico. 



New Mexico: Tunitcha Mountains; Sandia Mountains; Dulce. Dry lulls and 

 plain , iii the I pper Sonoran and lower pari of the Transition /.ones. 

 A low shrub, 15 to 20 cm. high, forming dense 'lumps. 



