-14- Rosaceae. 5147. Amelanchier Cusickii, Fernald. 5152. Cercocarpus ledifolius, Nutt. 5662. Crataegus Douglasii, Lindl. Fruit black when ripe. 5146. " Columbiania, Howell, or C. Douglasii, Lindl? A small tree having the inflorescence strongly pubescent, but thorns large of-ten triple; calyx lobes serrate. Fruit unknown. √5457. Fragaria, sp? Seems near F. platypetala, but rootstock simple; leaves nearly glabrous and glaucous; few-flowered; fruit ovate. √5458. Fragaria, sp? Doesn't agree with F. bracteata, in leaves not glabrate in age of under surface; flowers not so large as 1½-2 cm. Doesn't agree with F. platypetala in having leaflets appressed pubescent above, and serrate to below the middle; runners slender, abundant; scapes not stout, flowers not large as Rydberg makes them. √5460. Geum macrophyllum, Willd. 5151. " triflorum, Pursh. √5459. " " 5154. Holodiscus discolor, var. dumosus. √5456. Horkelia fusca, Lindl. 5661. Potentilla Sweetseri, sp. nov.? This plant has been referred to P. brevifolia, Nutt., but I doubt it. I think there are more differences between this plant and P. brevi- folia, as described by Torrey and Gray, and Rydberg, than there is between P. brevifolia and P. Grayi, Watson. I have examined my own plant most carefully, as well as the plants of Cusick from the same locality ("Near snow line, Strawberry Mts."), as well as his plant from the "Wallowa Mts, Oregon", and I find they all agree in the main. They all, from Strawberry Mt., have leaves with 5, or even 7, leaflets, not 3, and the style near the base is covered with knobs or excrescences. It seems to me impossible that these knobs should have escaped the eyes of Nuttall, Torrey and Gray, and Rydberg, and so, I am inclined to believe they must have been lacking in Nuttall's specimens. To be sure, these knobs vary much. On the Strawberry Mt. specimens they generally stand out from the style like the pegs upon an old- fashioned hat-rack! In the Wallowa Mt. specimens, they are more like mountain ridges, some peaks much more prominent than others. I take pleasure in naming this species, if it prove a new one, for Professor A. R. Sweetser, Head of the Department of Botany at the University of Oregon. 5150. Potentilla glandulosa, Lindl. √5462. " " √5464. " " var. monticola. 5149. " millegrana, Engelm. √5463. " Nuttallii, Lehm. √5465. Prunus emarginata, Walp. 5153. " Virginiana, L. Undistrib. Prunus demiss4,(Nutt) Dietr.