CONTRIBUTIONS TO WESTERN BOTANY. 5 



This is a more compact form, with densely fascicled leaves, 

 stouter stems, and the whole plant hoary. It abounds in the 

 Southern Sierras in similar situations, 



E.umbellatum var. stellatumCKeriLh. Linn. Soc. Trans. 17.409.) 

 Slender plants with cymosely-corapound umbels; flowers 

 mostly small, about tJ4 lines long, yellow; lateral rays bracted in 

 the niiddle. This includes E. tripodum and cognatum Greene. 

 Henry Mts., E. Utah, northwestward, to Alarysvale. and south- 

 ward to the Mogollons in Arizona, and thence westward to the 

 eastern side of the Sierras in the Middle Temperate life zone. 



E. umbellatum var. polyanthum (Benth. 1). C, Prod. 14, 12.) 

 Leaves spatulate to elliptical, small; rays 1-3, rarely 5, the 

 latter bracted in the middle, one of the bracts of the main umbel 

 generally large and leaf}-. This connects with the var. stellatum 

 through E.- polyanthum var, bahiaeforme. Plants glabrous to 

 white pubescent. Eastern Oregon on dry and stony hills, East- 

 ern California along the Sierras to Owen's Valley. In the Lower 

 Temperate life zone. 



E. umbellatum var. Torreyauum (Gray Proc. A. A, 8 158.) 



Umble simple; leaves glabrous, ovate to oblong-spatulate ; 

 2-4 inches long, yellow, at least the outer rays bracteate and with 

 a flower or two, rarely a variously produced ray arises from these 

 bracts. E. ellipticum is a connecting form. "This connects with 

 the type through E. dumosum Greene. Middle Mts. of Southern 

 Idaho and adjacent regions to the Sierras in the Middle Temperate 

 life zone. 



B. umbellatum var. subalpinum (Greene Pitt. ^ 18.) 



This is a tall and long-peduncled form, with dense leaves 

 which are very pubescent below and elliptical to oblanceolate and 

 acute ; flowers white ; bracts large ; stems more densely compacted 

 than usual ; it much resembles E, heracleoides. It abounds in the 

 higher mountains of Colorado, Wyoming and westward, extend- 



