STYRACEL. 
20 SILVA OF NORTH AMERICA. 
Mohrodendron produces light close-grained wood, but is not known to possess useful properties. 
Their lovely flowers and their immunity from the attacks of insects! and fungal diseases? make all the 
Mohrodendrons desirable inhabitants of parks and gardens, in which the two arborescent species are 
often cultivated. They are easily raised from seeds, which, if allowed to become dry, do not germinate 
until the second year; they can be transplanted without difficulty, and flourish in well-drained rich soil. 
The generic name commemorates the scientific accomplishments of Dr. Charles Mohr.’ 
1 Few records of injury to Mohrodendron by insects have been 
published, although the species seem to be favorites with one of the 
American large silk-worms, A ttacus Promethea, Harris, whose cocoons 
may be often seen on the branches in winter. A geometrid moth, 
Therina fervidaria, Hiibner, was first bred from larve found on 
Mohrodendron Carolinum in Georgia by Abbot, and although not 
known to be particularly injurious to the plants of this genus, it is 
often destructive to the foliage of Oaks (J. J. Walker, Ent. Month. 
Mag. August, 1888, 65). 
2 The species of Mohrodendron appear to be unusually exempt 
from the attacks of fungi, Polyporus Halesie, Berkeley & Curtis, 
being the only species that has been described as growing on Mohr- 
odendron Carolinum in the United States. This fungus was sup- 
posed, by the botanist who first described it, to be peculiar to Mohr- 
odendron, although several subsequent writers have expressed the 
opinion that it is merely a form of the older Polyporus amorphus, 
Fries. 
3 See iv. 90. 
CONSPECTUS OF THE ARBORESCENT SPECIES OF MOHRODENDRON. 
Corolla slightly lobed; ovary 4-celled; fruit 4-winged. Leaves oval or ovate-oblong 
. . . IL. M. Carorrmnum. 
Corolla divided nearly to the base; ovary usually 2-celled; fruit 2-winged. Leaves ovate or sometimes 
slightly obovate . . . 
2. M. DIPTERUM. 
