299 : ae a. 
to grow. It is propagated either from the seed or from seedlings. 
Where the ground can not be cultivated it is recommended that 
the trees be spaced 4x4 to 5x5 feet, and where the trees are to be 
cultivated they should be planted about 7x7 feet, and undercropped 
with corn for two or three years. The locust is not a shade endur- 
ing tree, so natural pruning is effective. However, it is recommended 
that the trees be gone over annually for three to five years and that 
very strong lateral branches be removed, and if the tree forks, that 
one part be removed. Wounds on the locust heal readily. Under 
good conditions the trees will attain a single post size in about 4 
to 6 years, depending on the quality of the soil and the distance 
apart the trees are planted. This tree has a mortal enemy in the 
locust borer, and the planting of the tree for commercial purposes 
should be confined to the southern counties where it is not seriously 
damaged by this pest. 
SIMAROUBACEA. Tue Quassta Famity. 
AILANTHUS. Tree or Heaven. 
Ailanthus glandulosa Desfontaines. Stink Tree. TREE OF 
Heaven. Plate 107. Bark gray, thin, rough or fissured on old 
trees, smooth on the branches and young trees; twigs very robust, 
at the end of season a glossy light brown; leaves spiral on the 
branches, odd-pinnate, 3-10 dm. (12-40 inches) long; leaflets 13-41, 
margins entire or with few teeth, drawn to a long point; flowers 
appear in June, in large terminal panicles, the staminate flowers 
emit an offensive odor; fruit numerous, twisted and broadly winged, 
about 1 em. (3% inch) wide and 4 em. (1% inches) long, the single 
seed near the center. 
Distribution. Introduced from Asia. Now well established in 
many parts of Indiana. It is generally regarded as a weed tree on 
account of the rapidity and certainty with which it spreads from 
the seed scattered by the wind. 
The published records of the distribution are as follows: Clark 
(Baird and Taylor); Delaware, Jay, Randolph and Wayne (Phinney); 
Fayette (Hessler); Franklin (Meyncke); Hamilton (Wilson); Jeffer- 
son (J. M. Coulter), (S. Coulter) and (Young); Kosciusko (Chip- 
man); Marion (Wilson); Monroe (Blatchley); Vigo (Blatchley). 
Additional records are: Putnam (Grimes); Decatur and Wells 
(Deam). 
Horticultural value. Adapted to all kinds of soils and all kinds 
of conditions. No tree will endure more abuse. Very ornamental 
