168 RYDBERG: NOTES ON ROSACEAE 
Columbia region, especially west of the Cascades and the latter 
in the northern ‘part of the Great Basin, which includes eastern 
Oregon, both extend north into British Columbia. 
28. Rosa CoviLLer Greene 
This species and R. Bolanderi are characterized among the 
cinnamon roses by the short ovate, short-acuminate sepals. 
R. Covillet is known only from the type locality, near Naylor, 
Klamath County, Oregon. 
29. ROSA SPITHAMAEA S. Wats. 
This species of northern California has been collected at one 
locality in the Columbia region :— 
OREGON: Wimmer, Hammond 120. 
30. ROSA ADENOCARPA Greene 
Notwithstanding Dr. Greene’s remark, “despite all its peculiar 
characteristics, a genuine member of this gymnocarpa group,”’ 
I am compelled to exclude it. The upper part of the hypanthium 
and calyx show no sign of being deciduous, the sepals are not 
those short ones of the R. gymnocarpa allies, and the hypanthium 
is bristly. These characters and the dwarf herbaceous stems indi- 
cate that the plant is related to R. spithamaea, where I have 
placed it. It is known only from the type locality, Mt. Gray- 
back, southwestern Oregon. 
31. ROSA PYRIFERA Rydberg 
This species is related on one hand to R. Macounii and on the 
other to R. ultramontana and R. pisicarpa, but differs from them 
all in the pear-shaped hypanthium, which has a more distinct 
neck. It is common in the northern Rockies, but the following 
specimens are from the Columbia region : — 
WASHINGTON: Clarks Spring, Kraeger 47. 
OREGON: Powder River Mountains, 1896, Piper; Horse 
Creek Canyon, Sheldon 8138; Thompson Creek, Brown 86; 
Ashland, Walpole 375; Tygh Valley, Walpole 336; Cow Creek, 
Coville 1162; Blue Mountains, Cusick 1697. 
