162 NORTH AMERICAN FAUNA. [xo. 16. 
Castilleja affinis Hook. & Arn. 
A plant collected in the Hudsonian zone near timberline just north 
of Red Butte by Vernon Bailey has been identified as this species by 
M. L. Fernald. Since the type locality of affinis is the low coast strip 
near San Francisco or Monterey, the typical form would hardly be 
expected to occur in the high timberline region of Shasta. 
Orthocarpus pilosus Watson. 
Common in places near timberline, particularly near ‘The [South] 
Gate,’ between the heads of Panther Creek and Squaw Creek. (Iden- 
tified by M. L. Fernald.) 
Mimulus implexus Greene. 
Abundant in wet places throughout the Hudsonian zone, reaching 
its greatest perfection in the neighborhood of timberline. In the shal- 
low rapids of some of the mountain rivulets it grows in such profusion 
that its leaves form extensive mucilaginous patches, which completely 
fill the beds of the streams. Its large and showy yellow flowers were 
in blossom from the latter part of July until the end of September. 
(Identitied by Professor Greene.) 
Mimulus moniliformis Greene. 
Two forms of large yellow Mimulus grow in the marsh at Wagon 
Camp, in the lower edge of the Canadian zone. (Identified by Professor 
Greene.) 
Mimulus tilingi (Regel.) Greene. 
Common in the marsh at Wagon Camp. (Identified by Professor 
Greene.) 
Mimulus primuloides Benth. 
Common in patches in marshy places and along streams in the Cana- 
dian and Hudsonian zones, but much more common in the Canadian 
than in the Hudsonian. It was ubundant at Wagon Camp and also in 
some of the heather meadows along Squaw Creek and other streams. 
(Identified by Miss Eastwood and Professor Greene.) 
Pentstemon menziesi Hook. 
One of the most characteristic and widely distributed plants of the 
higher slopes, where it is common among the bare rocks all the way 
around the mountain. It is common in the Hudsonian zone in the 
neighborhood of timberline, but much more abundant in the Alpine, 
and was found by Vernon Bailey as high as 10,200 feet. This species 
is easily distinguished from the other Alpine species of the region by 
its smooth entire leaves and relatively small bluish or violet blue fHlow- 
ers, which become pink or reddish with age. (Identified by Professor 
Greene.) The plant is by no means typical, but seems to be interme- 
diate between mercies! and davidsoni. It may be a distinct species, 
