914 STYRACACEAE 
Leaf-blades elliptic, oblong or oblong-oblanceolate, 4-15 cm. long, usually short-acuminate 
and acute or acutish at the apex, undulate or shallowly toothed, glabrous and shining 
above, more or less tomentose beneath, often tinged with yellow or bronze, attenuate or 
abruptly narrowed into short petioles : flowers sessile, 5-17 in axillary clusters: calyx cam- 
panulate, 2-2.5 mm. high ; lobes ovate to triangular-ovate, obtuse, slightly shorter than the 
tube: petals 5, obovate, or obovate-spatulate, 6-8 mm. long, united below, rounded or 
notched at the apex, yellowish : stamens exserted : drupe nut-like, oblong or ovoid, 10-14 
mm. long, glabrous, crowned with the persistent calyx-lobes. 
Chiefly in rich soil, Delaware to Florida and Louisiana. Spring. YELLOWWOOD. HORSE SUGAR. 
WILD LAUREL. 
FAMILY 4. STYRACACEAE A. DC. Srorax FAMILY. 
Commonly stellate-pubescent or scurfy shrubs or trees, some yielding a fra- 
grant balsamic resin. Leaves alternate, without stipules: blades entire or 
toothed. Inflorescence racemose, cymose or fascicled. Flowers perfect, regular. 
Calyx with 5, or rarely 4-8, short or obsolete lobes. Corolla of 5, or rarely 4-8, 
distinct or nearly distinct petals. Stamens few (8-16), adnate, in one series, to 
the corolla-tube. Filaments flattened and coherent at the base. Anthers in- 
trorse, adnate. Ovary 2-5-celled, the cavities opposite the calyx-lobes. Styles 
united. Ovules solitary or few in each cavity, anatropous, ascending or pen- 
dulous, or both. Fruit commonly a drupe or a capsule. Seeds mostly solitary, 
with a thin or leathery testa. Endosperm fleshy or horny. Embryo usually 
straight, axile. 
Ovary superior: fruit drupaceous, subglobose. 1. STYRAX. 
Ovary inferior: fruit nut-like, elongated, winged. 2. MOHRODENDRON. 
1. STYRAX L. 
Shrubs or trees, often clothed with scurfy or stellate pubescence. Leaves alternate : 
blades entire or slightly toothed. Flowers in short racemes, white, often drooping, sub- 
tended by small bracts. Calyx slightly adherent to the ovary, not accrescent, entire or 
slightly 5-toothed. Petals 5, distinct, or somewhat united, valvate or imbricated. Stamens 
10 or rarely more, adnate to the base of the corolla : anthers elongated, erect, the sacs 
united. Ovary superior, 3-celled or at length 1-celled by the obliteration of the septa. 
Ovules several in each cavity, ascending: stigma 3-toothed or 3-lobed. Drupe dry, 
subglobose, superior. Seeds commonly solitary. SroRAx. The plants flower in spring. 
Corolla-lobes valvate in the bud. 1, S. Americana. 
Corolla-lobes manifestly imbricated or convolute in the bud. 
Corolla-lobes lightly imbricated or convolute: pedicel and calyx canescent. 
noH inflorescence mostly leaf-like: leaf-blades slightly pubescent 
Bracts of the inflor n nly -li the panicle or raceme:, v 
on leaf-blades densely a, beneath. m i Ex dtd: 3. S. grandifolia. 
O. s parle : = strongly imbricated or convolute: pedicel and calyx g 4. S. plata nifolia. 
1. Styrax Americana Lam. A shrub 1-3 m. tall, with glandular and slightly pue 
cent twigs, peduncles and petioles. Leaf-blades oval, elliptic or oblong, often beset ee 
ovate or obovate, 2-10 cm. long, acute or short-acuminate at the apex, entire or sere: T 
toothed, usually acute at the base, dark green above, pale beneath, becoming gla d 
short-petioled : flowers white, about 2.5 cm. broad, drooping, their pedicels P ae 
long, often slightly pubescent: calyx about 4 mm. high, 5-lobed, much shorter t n : 
pedicel: corolla rotate; lobes valvate in the bud, elliptic-oblong or laneediao o diee 
acute, slightly pubescent without : filaments erect : anthers bright yellow : drupe subglobose, 
6-8 mm. in diameter, finely tomentose. 
On banks of streams, Virginia to Florida, Louisiana and Arkansas. 
2. Styrax pulverulénta Michx. A shrub, ranging from 1-4 m. in height, with 
canescent or hoary young foliage. Leaf-blades ovate, oval or obovate, acute or ia edie 
sharply serrate or rarely undulate, acute at the base, dark green above, more or e edi- 
escent beneath, short-petioled : flowers white, fragrant, loosely racemed, drooping. F i 
cels 2-4 cm. long, canescent or hoary: calyx 3-4 mm. long, 5-lobed, about I Soph 
the pedicel: corolla rotate; lobes 5, imbricated in the bud, oblong or ORE e 7-9 
rather obtuse, pubescent : filaments nearly erect: anthers yellow: drupe gubglobose, 
mm. in diameter, minutely but densely pubescent. 
In pine-land swamps or along streams, Virginia and Kentucky to Florida and Texas. 
2. S. pulverulenta. 
