Rydberg : Notes on Rosaceae 537 



0. australis resembles a small 0. opulifolius, but it has the short 

 caruncle of the western 0. capitatus. Its carpels are only about 

 half the size of those of either of the two species mentioned. 

 Spiraea caroliniana, mentioned in Marshall's Arbustum, may 

 belong here, but that species was evidently never published. To 

 0. australis belong, beside the type given, the following specimens : 



Mountain, J 



Hi 



Virginia: Summit, Stony Man Mountain, Aug. 13, 1901, 

 £ 5. & Mrs. Steele ijo ; Peaks of Otter, June 6, 1890, A. 

 Brawn, T. Hogg, &c. 



In the herbarium of the New York Botanical Garden there is 

 a specimen, received from the herbarium of P. V. LeRoy, and ac- 

 cording to the label collected in Mexico by Vischer, in 1838. 

 This has even smaller flowers than 0. australis. As Opulaster is 

 otherwise unknown from Mexico, there was probably a mistake in 

 labeling or a misplacement of labels, and the specimen probably 

 came from some other place. This specimen was therefore ignored 

 when the manuscript for the North American Flora was prepared, 



0. cordatus is most closely related to 0. intermedins, but the 

 two species differ in the form of the leaves and the ranges of the 

 two are widely separated. Besides those of the type collection, 

 given in the Flora, only the following specimens may be doubt- 

 fully referred to it : 



California: Portola, July, 1903, Elmer 4804. 



0. alabamensis is somewhat intermediate between 0. stellatus 



and 0. intermedins, but differs from both in the shape of the leaves, 



specially those of the sterile shoots. To 0. alabamensis belong 

 the foil 



owing specimens : 



1 



Alabama: Auburn, Sept., 1900, Lloyd & Earle ; April 17, 

 °97, Earle & Baker ; July 11, 1896, Earle & Undenvood. 

 South Carolina : Sandy river bottom, Clemson College, May 

 2 °i J 906, H. D. House 2175 ; Six Miles Creek, May 19, 1907, 



3383. 



Hap 



just as 



u * °pulifolius % 0. intermedins, 0. capitatus, and 0. malvaceus have 

 Wrongly pubescent and almost glabrous forms. 0. Hapemanii is, 

 however, so unlike 0. monogynus in habit that it was thought ad- 



