558 Rosaceae Rubus 



Leaflets of primocanes broad, of the ovate type, distinctly soft- 

 pubescent beneath; flower-clusters with 8 or more flowers (in 

 well-developed specimens), the pedicels stout unless grown in 

 the shade, often prickly and sometimes glandular; strongly 



prickly plants of robust habit with thick canes 



15. 72. ostryifolitcs. 



Primocane leaflets, at least the terminal one, broad-ovate and mostly sub- 

 cordate at the base, sometimes caudate-acuminate (sterile floricane 

 laterals should not be mistaken for primocanes); flower-clusters in 

 characteristic forms elongated with divaricate pedicels on upper 

 parts of plant but often in indefinite leafy clusters on lower parts. 



(See excluded species no. 358, p. 1062.) R. pergratus. 



Main flower-clusters short and somewhat hidden in the foliage, not of the 

 long-racemiform kind or of the ascendate kind but rather corymbiform, 

 the lower pedicels likely to be long; leaflets commonly broad and 

 heavy; flowers prevailingly large with broad, rounded petals. (The 

 lower flower-clusters of R. pergratus may seem to belong here.) 

 Leaflets mostly or all of a cuneate-obovate type ; canes erect or nearly 

 so, beginning to curve above the middle; prickles rather few and 



mostly less than 5 mm long 16. R. impar. 



Leaflets not mostly cuneate-obovate, especially on the primocanes; canes 



arching, usually beginning to curve below the middle and the tips 



often touching the ground; prickles usually stouter, more curved, and 



often more than 5 mm long. 



Floral leaflets, or leaves on flowering laterals, with broad, triangular 



or even obtuse serratures or teeth or, if sharp, then fine and close, 



not cut-toothed or jagged with narrow long teeth 



17. R. frondosus. 



Floral leaflets or leaves characteristically very strongly sharp-serrate 

 to laciniate-dentate or jagged, the serratures or teeth narrow and 

 deep, leaf blade usually narrow or else long-pointed; primocane 

 leaflets on the broad order and mostly large 18. R. abactus. 



1. Rubus odoratus L. Flowering Raspberry. Map 1128. In Indiana 

 this species is restricted to the rocky wooded slopes of the high banks of a 

 few streams in the counties shown on the map. I think it prefers a slightly 

 acid soil but when transplanted to a neutral soil it becomes luxuriant. 



N. S. to Mich., southw. to Ga. and Tenn. 



2. Rubus pubescens Raf. (Rhodora 11: 236. 1909.) (Rubus triflorus 

 Richardson of Gray, Man., ed. 7 and of Britton and Brown, Illus. Flora, 

 ed. 2.) Map 1129. Restricted to the lake area where it is generally found 

 in tamarack bogs and rarely in low, mucky woods. 



Lab. to Alaska, southw. to n. N. J. ?, Pa., Iowa, and Nebr. 



3. Rubus occidentalis L. Common Blackcap Raspberry. Map 1130. 

 This species is a native of every county of the state, being infrequent to 

 frequent throughout. It is found in almost all kinds of habitats but pre- 

 fers moist situations. 



N. B., s. Que. to Minn., southw. to Ga. and Mo. 



3a. Rubus occidentalis f. pa 1 1 id us (Bailey) Robinson. I have this 

 yellow-fruited form from only Lagrange and Owen Counties; I saw a 

 clump in the northeastern part of Steuben County but was not able to 

 collect it. 



