538 Rydberg : Notes on Rosaceae 



visable to give it a distinct name. In many respects it resembles 

 strongly 0. alternatis, and the author has entertained the thought 

 that it might be a 2-carpellary form of that species. The styles in 

 O. Hapenianii are, however, more or less spreading, while in 0. 

 alternans the style is erect, showing that the latter is related to O. 

 mahaceiis. Besides the type, the following specimens may be re- 

 ferred to 0. Hapernanii : 



Wyoming: Hartville, July 20, 1894, Aven Nelson ^gS. 



The following specimens are referred to O. alternans : 



Utah: Provo, Wahsatch Mountains, June 16, 1902, Goodding 

 iiSg ; Stansbury's Island, June 26, 1850, Stansbnry. 



Nevada : East Humboldt Mountains, S. Watson. 



Mr. A. A. Heller adopted the name O. paiiciflorits for 0. 

 malvaceus. It is true that the original specimens of Spiraea panci- 

 flora Nutt. belong to this species ; but S. pajiciflora was never 

 properly published, only mentioned as a synonym under S. opuli- 

 folia paiiciflora in Torrey and Gray's Flora. This variety was, 

 however, primarily based on S. inonogynaToYY., and hence belongs 

 rather to O. inonogynus. 



Spiraea 



Spiraea parvifolia Benth, is a very strange and interesting spe- 

 cies. Maximowicz referred it to the section (now the genus) 

 Petrophytiwi. It is, however, a true Spiraea, notwithstanding 

 the racemose inflorescence and the entire leaves. Neither has it 

 the depressed habit nor the fruit of Petrophytiun. As far as is 

 known to me, it has been collected but once. By the courtesy of 

 the director of the Kew Gardens, England, the New York Botan- 

 ical Garden has received an excellent drawing of the type and 

 some fragments of the plant, enough to show its real character. 

 Unfortunately, vS. parvifolia Benth. is antedated by ^. parvifolia 

 Raf I therefore took pleasure in naming the plant .S. Hartwegiana, 

 after the discoverer. 



The species which appeared in the North American Flora 

 under the name 5. Steveni has had a peculiar history. The older 

 botanists referred it to .S. chaviae dry folia L., a species with the 

 flowers in simple corymbs, instead of in flat-topped panicles. Later, 

 it was referred, together with S. corymbosa, S. lucida, S. splendens, 



