SUNFLOWER FAMILY 445 
5769. Senecio subnudus 
5770. Senecio resedifolius 
5767. Senecio osetia 
5768. Senecio hesperiu 
30. Senecio pérteri Greene. Porter’s Butterweed. Fig. 5771. 
layed renifolius Porter in Port. & Coult. “ag Colo. 83. 1874. Not Schultz-Bip. 1845. 
Senecio porteri Greene, Pittonia ie 186. 189 
fiecuce ooted perennial from a “wel developed, eens tae seroma creeping rhizome, gla- 
brous throughout, “essentially scapose, t cm. peduncle naked or with 1 or 2 minute bracts. 
Leaves SBA he thick, mostly eras crenate- oblate blade a to 2.5 cm. wide; heads 
solitary, fairly large the sone saben? involucre about . high. 
site ocky s (? talus es) in the ains, Arctic- Alpine Zone; Wallow a Mountains of northeastern 
Oregon (w ace re a only “otha a ici collection fe ith the collector’s note “very little seen’’) and in Colorado. 
Teel locality: White House Mountains, Colorado. 
Our plant appears to be identical with that ty claesiie: 
