598 STYRACACEAE. (Vor, II. 
Family 12. STYRACACEAE A. DC. Prodr. 8: 244. 1844. 
STORAX FAMILY. 
Trees or shrubs, with alternate exstipulate leaves. Flowers regular, per- 
fect, or rarely polygamo-dioecious, clustered, sometimes appearing before the 
leaves. Pubescence mostly stellate. Calyx more or less adnate to the ovary, 
4-8-toothed, or entire. Corolla gamopetalous or polypetalous, the lobes or 
petals 4-8. Stamens twice as many as the lobes of the corolla or petals, or 
more, inserted on its tube or base, arranged in 1 series, the filaments monadel- 
phous or 4-5-adelphous; anthers mostly introrse. Disk none. Ovary partly 
superior, 2~5-celled; ovules solitary or few in each cavity, anatropous; style 
slender; stigma simple or 2-5-lobed. Fruit a berry or drupe, or often nearly 
dry, winged in some genera, 1-seeded, or 2-5-celled with a seed in each cavity. 
Endosperm copious, fleshy; embryo usually straight; cotyledons flat. 
About 7 genera and 75 species, mostly tropical, most abundant in South America. 
Calyx superior, its tube obconic; fruit 2-4-winged. 1. Mohrodendron. 
Calyx nearly inferior, its tube campanulate; fruit globose or oblong. 2. Styrax. 
1. MOHRODENDRON Britton, Gard. & For. 6: 463. 1893. 
[Haxsia Ellis; L. Syst. Ed. 10, 2: 1044. 1759. Not. P. Br. 1756.] 
Small trees or shrubs, more or less stellate-pubescent, with membranous deciduous 
denticulate or dentate petioled leaves, and large white slender-pedicelled drooping bell- 
shaped flowers, in lateral fascicles or short racemes, appearing with or before the leaves. 
Calyx-tube obconic or obpyramidal, 4-5-ribbed, adnate to the ovary, the limb short, 4-toothed, 
Corolla campanulate, 4-5-cleft or 4—5-parted nearly to the base. Stamens 8-16; filaments 
flat, more or less monadelphous, slightly adnate to the corolla; anthers oblong. Ovary 2-4- 
celled; ovules about 4 in each cavity, the lower ascending, the upper pendulous. Fruit dry, 
oblong, 2-4-winged longitudinally, 1-4-celled, tipped with the style and the minute calyx- 
teeth. [In honor of Chas. Mohr, botanist of the Geological Survey of Alabama. ] 
About 3 species, natives of southeastern North America. 
1. Mohrodendron Carolinum (JL, ) Britton. 
Silver-bell or Snow-drop Tree. (Fig. 2833.) 
Halesia tetraptera I,. Sp. Pl. Ed. 2, 636. 1762. 
Halesia Carolina \,. Syst. Ed. 10, 1044. 1759. 
Mohrodendron Carolinum Britton, Gard. & For. 6: 
463. 1893. 
A small tree with maximum height of about 45° 
and trunk diameter of about 20’. Leaves oval, 
ovate or ovate-oblong, denticulate, acuminate at 
the apex, mostly narrowed at the base, dark green 
and glabrous above when old, pale green and stel- 
late-pubescent beneath, 2/-6’ long, 1/-3/ wide; 
flowers in lateral fascicles of 1-5 appearing with 
the leaves; pedicels filiform, %/-114’ long; calyx 
at flowering time about 2’’ long; corolla 6//-9/’ 
long; ovary 4-celled; fruit oblong-ellipsoid, 4- 
winged, 1/-114’ long, usually longer than its pedi- 
cel, several times longer than the persistent style. 
In woods and along streams, Virginia to Illinois, 
south to Floridaand Alabama. Wood soft. light brown; 
weight per cubic foot 35 lbs. Calico-wood. March-April. 
2. STYRAX L. Sp. Pl. 444. 1753. 
Shrubs or small trees, with alternate leaves, deciduous in our species, and rather large 
mostly white drooping flowers, in lateral or terminal fascicles or leafy racemes, appearing 
before or with the leaves. Calyx persistent, nearly inferior, its tube campanulate, adnate 
to the lower part of the ovary, its limb minutely 5-toothed. Corolla 5-parted or 5-divided, 
the segments or petals imbricate, convolute or valvate in the bud. Stamens twice as many 
as the corolla lobes or petals (rarely fewer); filaments flat, monadelphous below or rarely 
separate, inserted on the base of the corolla; anthers linear. Ovary nearly superior, mostly 
3-celled at the base; ovules several in each cavity, ascending; stigma 3-toothed, 3-lobed or 
capitate. Fruit globose or oblong, nearly dry, coriaceous or crustaceous, commonly only 
1-seeded, 3-valved at the summit. [Greek name of Storax.] 
About 70 species, natives of America, Asia and southern Europe. Besides the following, 2 
others occur in the southern and western United States. 
