Rubus 



ROSACEAE 



561 



50 



Map 1139 



Rubus impos Bailey 



50 



Map ||40 



Rubus laudatus Berger 



Rubus arqutus Link 



J 



and this variation has led authors to segregate three forms which have 

 been named. In the present treatment I believe it is best to regard this 

 prostrate Rubus as a complex under one name. 



Maine to Minn., southw. to Fla., Okla., and reported from Tex. 



8. Rubus Enslenii Tratt. Map 1135. Our only specimens were found in 

 very shallow soil on the cliffs in Perry County. 



Eastern Mass. to Wis., southw. to Ala. and Miss. 



9. Rubus centralis Bailey. (Gentes Herbarum 2: 330-331. 1932.) Map 



1136. The type of this species is my no. 27967 which was collected on the 

 crest of a black and white oak ridge just east of Forest Tract 53 in the 

 Clark County State Forest. The distribution of the species is not well 

 known but Bailey says he has specimens from Maryland, Virginia, and 

 Indiana. 



10. Rubus Deamii Bailey. (Gentes Herbarum 2: 463-464. 1932.) Map 



1137. The type of this species is my no. 27799 which was collected on a 

 washed slope in a fallow field on the north side of Little Blue River just 

 west of the bridge across Little Blue River about a half mile south of 

 Grantsburg in Crawford County. My no. 44636 is a topotype. My other 

 specimens referred to this species by Bailey are shown on the map. Ten- 

 nessee is the only other state from which Bailey cites specimens. 



11. Rubus allegheniensis Porter. Allegheny Blackberry. Map 1138. 

 This is one of our most abundant highbush blackberries and is found more 

 or less frequently probably throughout the state in almost all kinds of 

 habitats but, like all the blackberries, it prefers open habitats. 



N. S., Que. to Minn., southw. to N. C, Tenn., and Mo. 



12. Rubus impos Bailey. (Gentes Herbarum 2: 455-456. 1932.) Map 

 1139. Bailey refers specimens of mine from La Porte, Knox, and Posey 

 Counties to this species. Not known outside of Indiana. 



