450 PHANEROGAMOUS PLANTS. 



trees. — A stout species, the terete branches and young leaves clothed 

 with a short velvety pubescence, which nearly disappears with age. 

 Leaves 1 to 2 inches long, broadly obovate, obtuse, mostly 5-nerved 

 from the base, abruptly narrowed at the base into a short petiole. 

 Staminate flowers in interrupted, mostly 4-jointed spikes, which are 

 from half to three-fourths the length of the leaves. Anthers 2-celled. 

 Perianth 3-parted. Fruit about the size of a pepper-corn ; the color 

 uncertain in the dry specimens. In the Botany of Whipple's Report it 

 is incorrectly stated that the anthers are one-celled ; they appear to be 

 so when old, because the terminal chinks are closely approximated, 

 and are in a line with each other. 



2. Phoradendron flavescens, var. pubescens, Engehn. 



Phoradendron flavescens, var. pubescens, Eugelm. in Gray, PI. Lindheim, 2, p. 212 ; 



Torr. Bot. Mex. Bound, p. 134. 

 Yiscwm villosum, N"utt. in Torr. & Gray, El. 1, p. 654. 



Hab. Parasitic on trees (the particular kinds not recorded) ; from 

 the Umpqua Mountains southward to the Lower Sacramento; form- 

 ing large bunches. This, except in the pubescence and smaller leaves, 

 seems to differ in no essential characters from P. flavescens. 



Another species of this genus was found by Dr. Pickering on the 

 Shasta Mountain, but the specimens are not sufficiently complete for 

 determining whether it is undescribed or not. It grows on a species 

 of Juniper, in thick-set rigid bunches, which are about 4 inches high. 

 It is perfectly smooth, with narrowly-oblong obtuse leaves, which are 

 about three-fourths of an inch long. The inflorescence is scarcely 

 developed, but seems to be in few-flowered spikes. The flowers are 

 3-cleft, Dr. Pickering in his notes states that the fruit is " the size 

 of beaver shot." It differs from any other North American species 

 known to us. [Probably P. Bolleanum, Seemann.] 



2. ARCEUTHOBIUM, Bieberst. 



[There is a memorandum indicating the existence of one or more 

 species of this genus in the collection, but no determinations.] 



