Potentilla villosa Pallas.
A species with silvery strawberry-like leaves and bright yellow flowers. On the cliffs near the foot of Little Tahoma, at 7,500 feet elevation.
Potentilla fruticosa tenuifolia (Willdenow) Lehmann.
This shrubby cinquefoil occurs along White River Glacier.
Sibbaldia procumbens Linnaeus.
Abundant on the ridge near Sluiskin Falls.
Dryas octopetala Linnaeus.
Found in talus between Urania and White Glaciers by Professor Flett. This is the southernmost known station in the Cascade Mountains.
Pyrus occidentalis Watson.
This mountain ash occurs at 4,500 to 5,000 feet altitude, usually forming dense clumps. It is seldom over four feet high. From related species its dull purple glaucous fruit and dull green leaves, serrate only near the apex, easily distinguish it.
Pyrus sitchensis (Roemer) Piper.
(Sorbus sitchensis Roemer.)
This species grows from four to fifteen feet high, and is easily known by its intense scarlet fruit and shining leaflets, which are sharply serrate to the base. The plant of the Cascade Mountains matches exactly with the type from Sitka, and we can detect no differences in the shrub common in the Blue Mountains and in Western Idaho. This shrub has heretofore been known as Pyrus sambucifolia Chamisso & Schlechtendahl, but authentic Kamtschatka specimens of this last are clearly different from our plant.
Rosa nutkana Presl.
This common wild rose has been collected by Allen on the Goat Mountains, at 4,500 feet elevation.
SAXIFRAGACEAE. (Saxifrage Family.)
Ribes howellii Greene.
(Ribes acerifolium Howell.)
A small currant, two to four feet high, with pendent racemes of flowers and glaucous black fruit. Common in the shelter of trees up to their limit.