158 Bulletin of the University of Texas 



most smooth with age. Flowers white in flat topped hairy 

 cymes. Fruit -a small black juicy drupe. 



Western Texas, southern California and Mexico. 



2. Sambucus canadensis L. American Elder. This spe- 

 cies occurs from Nova Scotia tb Manitoba, Florida west to 

 Kansas 'and Texas. It is distinguished from the preceding 

 by its smooth foliage and inflorescence. 



VIBURNUM L. 



Viburnum rudifulum Rafinesque. Black Haw. A small 

 tree 30-35 high with rough reddish bark and gray twigs. 

 Leaves leathery, variable in form, elliptical-ovate or elliptical- 

 obovate, pointed, sharply and finely serrate, dark green and 

 lustrous above with numerous rusty brown hairs beneath. 

 Flowers perfect in white terminal clusters. Fruit a bright 

 blue drupe, l/2'-2/3' long, covered with -a glaucous bloom. 



Virginia, Illinois, Florida, Kansas and Texas. Occasionally 

 cultivated. 



