62 Rydberg: Notes on Rosaceae — XIV 



III. CAROLINAE 



Leaflets not subcoriaceous. 



Infrastipular prickles decidedly curved, short, stout. 4. R. palustris. 



Infrastipular prickles straight (rarely slightly curved), 

 slender. 

 Leaflets decidedly pubescent beneath. 5. R. Lyoni. 



Leaflets glabrous or pubescent only on the veins be- 

 neath. 

 Leaflets not glandular-dentate, the teeth usually 



simple. 6. R. Carolina. 



Leaflets glandular-dentate, often with double 



teeth. 7. R. serrulata. 



Leaflets subcoriaceous, densely pubescent beneath. 8. R.rudiuscula. 



4. Rosa palustris Marsh. 

 This has been reported only in the Mississippi and Minnesota 

 River valleys, where the more pubescent western form has been 

 found. 



5. Rosa Lyoni Pursh 

 Kansas: Cherokee County, Hitchcock 978. 

 Iowa: Iowa City, 1916, Wylie. 



Also reported from Minnesota. 



6. Rosa Carolina L. 



This has been reported from Minnesota and Kansas, but 

 no specimens have been seen. It is found also in Wisconsin 

 and Missouri. 



7. Rosa serrulata Raf. 



This has been reported from Iowa, but no specimens are 

 now c'.t hand. 



8. Rosa rudiuscula Greene 



This belongs to the Carolina and not to the Cinnamomea 

 group, having the hypanthium bristly and with the achenes 

 inserted in the bottom only. The infrastipular prickles are 

 small and scarcely stronger than the bristles. It also has spread- 

 ing and deciduous sepals; and the leaflets are thicker and firmer 

 than in R. Carolina and R. Lyoni. The flowers are usually 

 corymbose and the plant has the general aspect of R. suffulta. 

 Dr. Greene in the original publications cited several specimens 

 that do not belong to the species. 



