148 



HANDBOOK 14 8, U.S. DEPARTMENT OF AGRICULTURE 



32. Buds rarely clustered at twig tips; bark not 

 bitter or with peach-pit odor. 



currants, alder buckthorn, serviceberries. 

 35. Twigs ridged or lined downward from leaf-scar 

 ends; pith porous or spongy; bark of new twigs 

 thin-papery, splitting, shredding or peeling, 

 soon shed; pale pores (lenticels) lacking; leaf 

 scars narrowly U- or V-shaped to broadly 

 crescent- or heart-shaped, slightly raised; spur- 

 like, leaf-scarred twigs common; buds often 

 short-stalked; true end buds present; fruit- 

 cluster stalks sometimes persistent; alternate 

 hosts for white pine blister rust, some species 

 more susceptible than others. [Alternate 35, 

 p. 155.] 



currants (Ribes spp.) 



36. Buds, new twigs yellow-resin-dotted; buds to 



/8 inch long; wood sometimes with bad odor; 



branches few, erect, ascending or sprawling; 



coarse-stemmed shrubs of moist woods. 



37. Leaf scars heart-shaped; buds egg- to 



globe-shaped, hairless, brown to purple 



Heart-shaped 

 leaf scar 



r? 



Golden currant 



Yellow resin drops on buds 

 and new twigs,- replaced 

 by black pinpoint dots 

 on second-year twigs 



Blood currant 



F-494094 



Western black currant 



F-486438 



Stink currant 



