This section is from the book "Wild Flowers Of The North American Mountains", by Julia W. Henshaw. Also available from Amazon: Wild Flowers of the North American Mountains.
Leaves: broadly oval, obovate, with three rather shallow lobes above the middle, coarsely and unequally dentate, glabrous above, more or less pubescent beneath. Flowers: white, in compound cymes, all perfect and small; corolla campanulate, five-lobed. Fruit: drupes globose, bright red, acid.
A straggling shrub growing from two to six feet high and bearing many small clusters of tiny white and pinkish flowers, whose bell-shaped corollas are divided into five lobes above the middle and are pointed and coarsely toothed.
 
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