150 NORTH AMERICAN FAUNA. [xo. 16. 
Potentilla glandulosa Lindl. Large Yellow Potentilla. 
A large Potentilla from the Transition zone, near Wagon Camp, is 
identified by Mr. Rydberg as P. glandulosa. 
Rosa californica C. & 8. California Rose. 
Abundant in moist places in the Transition zone near Sisson Tavern 
and along the east base of Mount Eddy. 
Rosa gymnocarpa Nutt. Wild Rose. 
Common in places in the Transition zone, particularly a little below 
Wagon Camp. 
Rubus parviflorus Nutt. [=R. nutkanus Auct.| Western Thimbleberry. 
Common in cool moist places in McCloud Valley and at Sisson, and 
thence up through the Transition zone to an altitude of 5,200 feet on 
the road to Wagon Camp, and 6,000 feet along Squaw Creek and in 
Mud Creek Canyon. Most of the Transition slopes of Shasta are too 
dry for the thimbleberry. 
Rubus vitifolius C. & 8. Blackberry. 
Common in cool moist places in the Transition zone near Sisson and 
along the east base of tle Scott Mountains. 
Sibbaldia procumbens Linn. Alpine Sibbaldia. 
Common in the Hudsonian zone near timberline, particularly in 
springy places and in the heather beds. Usually occurs in small 
patches below extreme timberline. 
Amelanchier alnifolia Nutt. Serviceberry. 
Abundant in moderately noist parts of the Transition zone. On the 
west and southwest sides of the mountain it reaches from Sisson to 
Wagon Camp. Ona warm southwest slope on the steep ridge between 
Mud Creek Canyon and Clear Creek it occurs, with several other 
Transition zone species, at the unusual altitude of about 7,000 feet. 
(See p. £9.) 
Crategus rivularis Nutt. Black Haw. 
Common in the Transition zone about the west base of Shasta, par- 
ticularly along streams at the east base of Mount Eddy, from the head 
of the Sacramento northward, usually in cool moist soil. Common near 
Sisson Tavern. 
Sorbus sambucifolia (C. & S.). Mountain Ash. 
Rather scarce and confined chiefly to the relatively moist Transition 
zone Slopes of the canyons. In Mud Creek Canyon it was found along 
the bottom from 5,600 feet to 6,700 feet. Along Squaw Creek it was 
found at about 5,500 feet. 
Cerasus demissa (Nutt.). Western Chokecherry. 
Common in places in the lower part of the Transition zone. Observed 
on the south slope above McCloud Mill, mainly in the gulches; also in 
the neighborhood of Sisson, and near the south end of Shasta Valley. 
