Tree of Heaven
from China to provide food for silkworms. Shade-intolerant and very fast
growing. Generally free from insects and disease; resistant to air pollution.
Roots often clog drains, break sidewalks and foundations, and are not recommended
for ornamental use.
BUDS: False end buds; lateral buds small, subglobose, brownish and downy.
TWIGS: Very stout; yellowish to light brown with yellow or brown pith; covered with light hairs when young; large leaf scars.
BARK: Gray-brown and smooth; over time becoming rough and fissured; looks like surface of a cantaloupe.
Urban environments and waste areas; thrives in adverse conditions and disturbed
sites; immune to dust and smoke; introduced from China.