Rydberg: Notes on Rosaceae 363 



Drymocallis pumila was based on some specimens included in 

 D. rhomboidea in my monograph of 1898, and some material 

 received later. Although it resembles D. rhomboidea in habit, 

 it differs, however, in one essential character, viz., in the styles, 

 which are decidedly fusiform. In D. rhomboidea as well as in 

 D. glabrata the styles are filiform. Dr. Wolf remarks under 

 Potentilla rhomboidea that he has found in "typical and fine speci- 

 mens" of this species collected by Suksdorf {no. 742) the styles 

 to be fusiform. This number of Suksdorf's, as seen below, belongs 

 to D. pumila instead. The large flowers would place it near 

 D.fissa, but it is a much more delicate plant, the stem leaves are 

 much reduced and the bractlets are elliptic or oval instead of 

 lanceolate or linear. The following specimens belong here: 



Oregon: Stein's Mountains, 1901, Cusick 2371; same locality, 

 1901, Griffiths & Morris 576, and 1896, /. B. Leiberg 2508. 



Washington: Mount Paddo, 1885, Suksdorf 742. 



Nevada: Summit Lake, 1901, Griffiths &• Morris 311. 



Utah: Marysvale, 1894, M. E. Jones 5375n. 



Drymocallis viscosa resembles much D. gland ulosa in habit, 

 has the large petals of D. valida and D. fissa and the bractlets of 

 D. pumila, but differs from all in the conspicuous viscidity of the 

 plant. It is known from the type locality only. 



Drymocallis arizonica Rydb. resembles closely D. Hanseni 

 but differs in the short dense inflorescence and the longer bractlets. 

 It might have been included in that species but it grows in an 

 entirely different region. The following specimens belong to it: 



Arizona: Mormon Lake, 1898, MacDougal 64; Bill Williams 

 Mountains, 1883, Rusby 137 and 5Q4. 



LTtah: Near St. George, 1877, Palmer 146. 



Drymocallis amplifolia connects the D. glandulosa group with 

 that of D. Wrangelliana. It has the habit of the former and the 

 small pale petals of the latter. It is characterized by its large 

 rhombic terminal leaflets, which resemble somewhat those of 

 D. foliosa. The latter has very large deep yellow petals. D. 

 amplifolia is known from the type station only, from which several 

 specimens have been seen. 



Drymocallis oregana was based partly on material included in 

 D. Wrangelliana in my monograph and partly on material studied 



