OLACACEAE 1103 



2. NESTRONIA Kaf. 



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 : starninate 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, 

 1 -celled : style stout, simple: stigma 3-4-lobed. Drupe nearly as thick as long, pedi- 

 celled. Seed solitary. [Darbya A. Gray. ] 



1. Nestronia umbSllula 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. BUCKLEY A 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 

 cm. 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 gubglobose, 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. OIL-NUT. BUFFALO-NUT. 



FAMILY 3. OLACACEAE Lindl. XIMENIA FAMILY. 



Shrubs or trees, or rarely shrubby herbs, with erect or twining stems. 

 Leaves usually alternate : blades eutire or rarely toothed : stipules wanting. 



