CATALOGUE. 189 



Uintas, on a ridge above Bear River Canon ; 9,000 feet elevation ; Au- 

 gust. (663.) 



Senecio hydrophilus, Nutt. Perennial, glabrous ; stem solitary, sim- 

 ple, striate, 2-3° high ; leaves thickish, broadly lanceolate, acute, entire or 

 obscurely repand-denticulate, the midrib very broad ; lower ones 6-7' long, 

 H-2' broad, narrowed into a short petiole dilated at the base and clasping ; 

 upper ones gradually smaller, sessile, partly clasping ; heads small, in a rather 

 dense compound nearly naked corymb ; involucres obscurely calyculate ; the 

 scales lanceolate with a minute blackened point ; rays small, 3-6 ; achenia 

 glabrous. — Wyoming and Colorado to California ; Valley of Great Salt Lake, 

 (Stansbury.) Wet meadows in Ruby Valley, Nevada, in Parley's Park, and 

 at the head of Echo Canon in the Wahsatch ; 6-7,000 feet elevation ; 

 July-September. (664.) 



Senecio triangularis. Hook. Glabrous ; stems 2-4° high, simple, 

 striate, leafy, 3-4 growing from one root; leaves 3-5' long, lJ-3' wide, 

 deltoid-ovate or triangular-lanceolate, sharply and unequally repand-dentate 

 or cut-toothed, acute, truncate or subcordate at the base, all but the upper- 

 most on slender, often winged, petioles ; heads rather large, 6" long, few in 

 a loose or sometimes fastigiate corymb ; involucres subcylindraceous, with a 

 few linear-subulate bractlets at the base, the scales about 15, lanceolate with 

 sphacelate tips ; rays 6-9, (10-12, T. 8^ G.,^ less than twice as long as the 

 involucre ; achenia striate, glabrous. — Alaska to California, Saskatchewan and 

 Colorado. Banks of creeks and wet places, East Humboldt Mountains and 

 Uintas ; 7-8,000 feet elevation ; July, August. (665.) 



Senecio Andinus, Nutt. Glabrous ; stems many from one root, 2-4° 

 high, simple, striate, very leafy ; leaves 3-5' long, 3-10" wide, linear- 

 lanceolate, acute at both ends, serrulate, often sharply so ; upper ones sessile ; 

 lower ones short-petioled ; heads 4" long, very numerous in panicled corymbs ; 

 involucres calyculate with small subulate bractlets; rays 5-8, disk-flowers 

 12-20 ; achenia glabrous. — 8. Serra has fewer and larger heads, as in 8. tri- 

 angularis, and the leaves are sharply serrate with incurved teeth Oregon to 

 Southern Idaho and "Rocky Mountains at 41°," (Nuttall!) Near Carson 

 City, Nevada, (Anderson ! ) Banks of streams, Havallah and East Humboldt 

 Mountains, and along the eastern base of the Wahsatch ; 5,600-8,000 feet 

 elevation ; June- August. {QQQ^ 



Senecio aureus, L. The typical form, with roundish-ovate cordaet 



