OLACACEAE 1103 
2. NESTRONIA Raf. 
Low shrubs parasitic on the roots of other plants, with bright green foliage and a 
smooth shining bark. Stems terete, branched. Leaves opposite : blades thickish, entire, 
short-petioled. Flowers polygamo-dioecious, greenish : staminate in axillary peduncled 
umbels: pistillate solitary in the axils. Calyx of 4-5 valvate or slightly imbricated 
sepals. Hypanthium turbinate, adnate to the ovary. Stamens 4-5, inserted at the base 
of the sepals, alternating with the lobes of the disk: filaments short. Ovary inferior, 
l-celled : style stout, simple: stigma 3-4-lobed. Drupe nearly as thick as long, pedi- 
celled. Seed solitary. [Darbya A. Gray.] 
1. Nestronia umbéllula Raf. A low branching shrub, 3-10 dm. tall, with glabrous 
foliage. Leaves opposite or nearly so: blades membranous, oval varying to ovate or obo- 
vate, 2-7 cm. long, obtuse or acute, or rarely acuminate at both ends, entire, undulate, 
bright green above, pale beneath, short-petioled: staminate flowers 3-9 in axillary 
umbels: peduncles 1-3 cm. long: hypanthium top-shaped: calyx glaucescent, short-pedi- 
celled : sepals oblong-ovate, 2 mm. long, about equalling the hypanthium, obtuse: stamens 
shorter than the sepals: pistillate flowers solitary in the axils: pedicels 2-3 mm. long: 
sepals ovate: drupe oval or oblong-oval, 10-13 mm. long, glaucous. 
In woods and along streams, Virginia to Georgia and Alabama. Spring. 
3. BUCKLEYA Torr. 
Slender upright shrubs, with 2-ranked branches and leaves. Leaves opposite or nearly 
so: blades narrow, membranous, entire. Flowers small, greenish, dioecious : staminate in 
terminal umbels; hypanthium club-shaped, slender ; sepals 5, ovate or oval; stamens 4, 
shorter than the sepals ; filaments filiform ; anthers 2-celled, opening lengthwise. Pistil- 
late flowers terminating branchlets, solitary: hypanthium thick, clavate: sepals nar- 
row, rather persistent: disk 4-lobed: ovary 1-celled, adnate to the hypanthium: style 
slender : stigma 4-lobed. Ovules pendulous. Drupe solitary, slightly flattened, furrowed. 
Seed shaped like the drupe. 
1. Buckleya distichophylla (Nutt.) Torr. A shrub 2-4 m. tall, the pubescent 
branches 2-ranked. Leaves opposite or nearly so; blades lanceolate or ovate-lanceolate, 
2-7 cm. long, acuminate at both ends or acute at the base, entire, ciliate, undulate, 2- 
ranked, sessile : staminate flowers in terminal umbels: peduncles 2-4 mm. long: sepals 4, 
ovate, 1.5-2 cm. long, obtuse, ciliate: stamens 4, shorter than the sepals: pistillate flowers 
solitary, terminal, minutely pubescent without: hypanthium club-shaped : sepals linear 
or linear-lanceolate, acuminate, spreading or reflexed : drupe oval or oblong-oval, 2-2.5 
em. long, yellowish green. 
On river banks, North Carolina and Tennessee. Spring and summer. 
4. PYRULARIA Michx. 
Shrubs or trees, with more or less pubescent foliage. Stems with spreading branches. 
Leaves alternate, deciduous: blades thickish, short-petioled. Flowers dioecious or poly- 
gamous, green, in terminal recemes, the staminate with a campanulate hypanthium, 3-5 
sepals and 3-5 stamens inserted at the base of the calyx, alternating with as many scale- 
like lobes of the disk.  Pistillate and perfect flowers with a turbinate hypanthium, and 3-5 
sepals: style stout: stigma depressed-capitate. Drupe pyriform, drooping, with a thin 
exocarp. Stone thin. Seed subglobose. Endosperm very oily. 
1. Pyrularia pubera Michx. A branching shrub 1-3 m. tall, with finely pubescent 
foliage. Leaves alternate; blades thickish, oblong or elliptic, or commonly broadest above 
the middle, acute or acuminate at both ends, 4-15 cm. long, entire, undulate, short- 
petioled : racemes sometimes densely pubescent, short-peduncled : calyx greenish, broadly 
campanulate, about 4-5 mm. long, minutely pubescent: sepals ovate, recurved, about as 
long as the tube, acutish : stamens included : drupe globose-obovoid or subglobose, 1.5-2 
cm. in diameter, yellowish, contracted into a long base. [P. oleifera (Muhl.) A. Gray. ] 
In woods, Pennsylvania to middle Georgia and Alabama. Spring. Orr-NUT. BUFFALO-NUT. 
FAMILY 3. OLACACEAE Lindl.  XrwENIA FAMILY. 
Shrubs or trees, or rarely shrubby herbs, with erect or twining stems. 
Leaves usually alternate: blades entire or rarely toothed: stipules wanting. 
