166 NORTH AMERICAN FAUNA. xo. 16. 
Chenactis nevadensis (Kellogg) Gray. Alpine Chenactis. 
This curious composite, with whitish tubular flowers, much divided 
sticky leaves, and a smell like that of alcoholic specimens, occurs here 
and there in the pumice sand and among the broken lava shale above 
timberline. It was first seen in flower on the north side of Shastina 
July 24 (alt. 9,000 feet), and early in August was flowering plentifully 
on the south slope of Shasta above the head of Squaw Creek (alt. 
9,300 feet). (Identified by Professor Greene.) 
Chrysothamnus bloomeri (Gray) Greene. 
One of the commonest and most widely distributed plants of the 
higher slopes, where it occupies pumice soils from the bottom of the 
Hudsonian zone up to several hundred feet above timberline. It was 
rarely found above an altitude of 9,000 feet. 
This plant is very long lived, and although the part above ground 
is relatively small it springs from a large woody base resembling that of 
the true sagebrush. The root is enormous. The main taproot (some- 
times double) usually sinks so deeply into the soil that I was unable 
to dig one up without breaking off the terminal point. In mature 
plants the main root measures about 200 millimeters in circumference 
where it enters the ground, and is 500 to 600 millimeters in length. It 
gives off numerous small and slender rootlets some of which exceed 
600 millimeters in length. The height of the plant above ground 
rarely exceeds 150 millimeters. 
Chrysothamnus bloomeri angustatus (Gray) Greene. 
Common at Wagon Camp and in various parts of the Transition zone, 
usually scattered through the manzanita chaparral. Vernon Bailey 
collected it at Sheep Rock. (Identified by Professor Greene.) 
Chrysothamnus occidentalis Greene. Rabbit Brush. 
Fairly common in open spots on the lower slopes throughout the 
Transition zone, where it is mixed with Nunzia tridentata, Arctostaphy- 
los patula, and Ceanothus velutinus. This large white-stemmed spe- 
cies occurs sparingly in dry soil at Sisson, and thence to Edgewood 
and Shasta Valley, in the upper edge of the Upper Sonoran zone, where 
it is common among the sagebrush. It was obtained at Sheep Rock 
by Vernon Bailey. (Identitied by Professor Greene.) 
Chrysothamnus viscidiflorus Nutt. 
Common in the upper part of the Upper Sonoran zone in Shasta 
Valley. (Identified by Professor Greene.) 
Erigeron armeriefolium Turcz. 
Rather common near timberline. Specimens were collected above 
Squaw Creek, near the head of Mud Creek Canyon, and on the north 
slope of Shastina. (Identified by Professor Greene.) 
