oor., 18991] PLANTS. 167 
Erigeroh compositus trifidus Hook. 
Common oh the slopes of broken shale and pumice above timberline, 
where it ofteh grows in mats of Silene suksdorfi close under the edges 
of rocks. Oni the south side of Shasta it was not observed lower than 
9,200 feet, but on the cold north slope of Shastina it was found as low 
as 8,900 feet. Its yellow flowers are rather conspicuous, and were 
notéd from thé latter part of July untillate in August. (Identified by 
Professor Gredéne) 
Erigéron inornatus Gray. 
This tall ahd much-branched FErigeron was found in Mud Creek 
Canyon and along Squaw Greek, a little below the fall, at an altitude of 
6,800 feet. (Identified by Professor Greene.) 
Eupatdrium occidentale Hook. 
Collected by Vérnon Bailey and Miss Wilkins ou Horse Camp Trail 
on the boundary between the Transition and Canadian zones. (Identi- 
fied by Proféssor Greene.) 
Heleniastrum rivulare Greene. 
Common on damp ground at Wagon Camp, on the boundary between 
the Canadian and Transition zones. (Identified by Miss Eastwood.) 
Hulsea nana Gray. 
A common and characteristic plant of the barren alpine slopes above 
timberline, where its showy yellow heads are conspicuous among the 
bare rocks. Its léaves are sticky, crinkled, and relatively smooth. It 
was found on most of the high ridges above timberline all the way 
around the mountain, aud was obtained on the north side of Shastina 
at an altitude of 9,000 feet. Its highest limit on the southwest side, as 
observed by Vernon Bailey, is 11,300 fect. (Identified by Miss East- 
wood and Professor Greene.) 
Hulsea larseni Gray. 
Common on the pumice slopes above timberline, growing with H. 
nana, from which it may be easily distinguished by the leaves, which 
are covered with a dense whitish pubescence. (Identified by Professor 
Greene.) 
Madia bolanderi Gray. 
Very common in the marsh at Wagon Camp, where it was in blossom 
all summer. Common also along some of the streams in the upper 
part of the Transition zone, where the low temperature resulting from 
the water carries narrow tongues of Canadian zone species down to alti- 
tudes below their normal limits. (Identified by Miss Eastwood.) 
Senecio trigonophyllus Greene. 
Common along Panther Creek in the Shasta fir belt. (Identitied by 
Miss Eastwood and Professor Greene.) 
