PIPER: A NEW WALDSTEINIA FROM IDAHO 181 
other species, P. Canbyi Gray, is confined to one or two localities 
in the mountains of Virginia. 
Spiraca lucida (Dougl.) Greene ranges from Alaska to Oregon 
and Wyoming and eastward to the Black Hills. It seems to me 
identical with the Alleghanian S. corymbosa Raf., the distinctions 
pointed out by Professor Greene (Pittonia, 2: 221) not holding 
good. Indeed, both supposed species are exceedingly close to if 
not identical with S. detulaefolia Pallas. 
Trautvetteria grandis Nutt., of Idaho, Washington, Oregon 
and British Columbia, is very similar to the other American spe- 
cies 7: palmata F. & M., of the southern Alleghanies. 
Boykinia occidentalis T. & G., of the coast region of Oregon 
and Washington, is the nearest ally of B. aconitifolia Nutt., of the 
southern Alleghanies. All the other known species are Pacific. 
Rhododendron Californicum Hook., of the Cascade and Coast 
Mountains, in Washington, Oregon and North California, has no 
close relatives nearer than the Alleghany Mountains. 
Xerophyllum tenax (Pursh) Nutt. ranges from British Columbia 
to western Montana and middle California. Its Atlantic congener 
X. asphodeloides Nutt. occurs from New Jersey to Georgia. 
Of the significance of these examples the writer has no 
opinion to hazard. They are sufficiently curious, however, to 
deserve attention being called to them. 
PULLMAN, WASHINGTON. 
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