Storax Family 355 
The two native species are as good or better than anv of the exotic 
introductions. 
* A. tetraptera Winn. (135) (Wohrodendron carolinum), the Four- 
winged Silver Bell, so called from the four-winged fruit; is a large shrub, 
growing to twenty feet, often in tree form, with a bewildering, cloudy 
mass of snowy white; early flowers (May); it is hardier than its con- 
gener — 
* HT. diptera Ellis. (136), the Two-Winged Silver Bell, which is smaller 
(ten feet), but has even more showy, larger blossoms and leaves; it 
needs protection in the north. 
Styrax and Symplocus. Storax. Two closely allied genera of over 
two hundred and thirty species, furnish, mainly for southern planting, 
a few small trees and shrubs, which, because of their delicate, white 
flowers and somewhat tropical-looking, leathery foliage, and graceful 
habit, have ornamental value. They are best planted singly, are 
adapted to light soils, but only half hardy. 
Styrax grandiflora Ait. (137), a shrub of five to ten feet, with large, 
pointed leaves (two to six inches and more), S. americana Lam. (138), 
and S. pulverulenia (139), the three native species, are of southern 
range, arid hence not very hardy, and are outdone in beauty by the 
Japanese Storax. 
S. Japonica S. & Z. (140) is a small to medium-sized tree or shrub 
(thirty feet), with horizontal branch habit; is preferably kept in shrub 
form to secure the best flower show, the pendulous 1acemes of fragrant, 
pure white flowers, with yellow stamens, covering the entire length of 
the branchlets in early summer. The leaves are small (one to three 
inch), pointed, light green. It is hardy as far as New York City, and 
a splendid specimen plant. 
S. Obassta S. & Z. (141), sometimes growing into a small tree, also 
from Japan, with catalpa-like leaves (six to ten inch) is less effective. 
Symplocos tinctoria L’Hert., Sweaileaf, so called from the fragrance 
of its foliage, a pretty, low shrub, sometimes tree, from the Southern 
States, is almost an evergreen, with long narrow, somewhat leathery 
leaves, and clusters of fragrant yellow flowers. 
S. crategoides Buch-Ham (143); from Japan, is the most hardy 
of this group, a shrub (five to eight feet), sometimes assuming tree 
form (thirty feet), resembling the hawthorn in outline, forming an 
irregular open head with long, thick, rough leaves and panicles of fra- 
