CAPRIFOLIACER. SILVA OF NORTH AMERICA. 87 
Sambucus, the classical name of the Elder-tree, is believed to have been derived from capZixy, a 
musical instrument, probably in allusion to the use of the pithy stems. 
Rust, 4icidium Sambuci, Schweinitz. In its appearance this is one 
of the most striking of the Cluster Cups found in the eastern 
United States, and forms marked yellow distortions on the leaves, 
petioles, and young shoots, which when the fungus is luxuriant 
become bent and curved. Several other fungi occur on different 
species of Sambucus in the United States, although none of them 
are very conspicuous or cause serious diseases. 
SYNOPSIS OF THE NORTH AMERICAN ARBORESCENT SPECIES. 
Flowers in compound depressed 5 or 8-rayed cymes, the four external rays once to three times unequally 5-rayed, the central 
ray smaller, finally reduced to 3-flowered cymelets or to single flowers. Fruit blue-black; nutlets punctate-rugulose ; pith 
white. 
Leaves and young shoots more or less pubescent or cinero-canescent. 
Fruit destitute of bloom . 
Leaves and young shoots glabrous. 
1. Sampucus CANADENSIS, var. MEXICANA. 
Fruit whitened with a glaucous bloom. . . . .. . - - ~- . 2. SAMBUCUS GLAUCA. 
