418 JUGLANDACK^. ( WALNUT FAMILY.) 



2<'clk'(l, adnate to tlie truncated connective. Ovaries numerous, obconi- 

 cal, hairy at tiie base. Ovules 1 - 2, ortliotropous, pendulous. Style sub- 

 ulate. Nut 1-seedetl. Seed cylindrical. Embryo in the axis of scarce 

 fleshy albumen. — Flowers intermixed with copious club-shaped scales. — 

 Consisting of the single genus. 



1. PL AT ANUS, L. Plane-Tree. Svcamohe. 



I. P. OCCidentalis, L. — Leaves (4' -9' wide) round-cordate, angularly 

 lohcd and toothed, covered when young with dense whitish down, soon smooth ; 

 si i pules toothed ; heads pendulous (8" -12" in diameter). — Kiver-hanks, Flor- 

 i(hi, iiiid northward. March and April. — A large tree, with the wiiite bark 

 separating in thin i)Uites. 



Order 127. JUGLANDACEiE. (Walnut Family.) 



Trees, with alternate odd-pinnate exstipulate leaves and monoecious 

 apetalous or minutely petalled flowers. Sterile flowers in j)endulous 

 aments. Calyx 2 - 6-partcd, the stamens few or numerous. Fertile flow- 

 ers single or clustered. Caly.x 3 - 5-parted, the tube adherent to the 

 incompletely 2 - 4-celled ovary. Fruit drupaceous, with a bony endocarp. 

 Seed 4-lobed, without albumen, orthotropous. Cotyledons oily, 2-lobed. 

 Radicle short, superior. 



1. CARYA, Nutt. Hickory. Pignut. 



Aments of the sterile flowers mostly three together, on a common peduncle, 

 lateral. Calyx unequally .3-parted. Stamens 3-6. Fertile flowers terminal. 

 Calyx 4-parted. Petals none. Stigma large, 4-lobed. Nut smooth, 4 - 6-angled, 

 incompletely 4-celled ; the coriaceous epicarp (imsk) j)artly or completely 

 4-valved. — Trees, mostly with scaly buds. Leaflets serrate. Fruit roundish. 

 * Epicarp vei-y thick, 4-valved : seed thick, edible. 



1. C. alba, Nutt. (Shell-hark Hickory.) Leaflets 5-7 (mostly 5), 

 lanceolate-oliiong, or the upper ones ohovate-oblong, acuminate, pubescent he 

 neath ; fruit depressed-globose ; nut roundish, thin-slieiled, compressed, 4-angl('d, 

 sligiitiy pointed. — Ricli woods in tlic up])er districts, (icor^na, and northward. 

 March and April. — A large tree, with shaggy and scaly hark 



2. C. sulcata, Nutt. Leaflets 7 -9, ohovate-ol)h)nir, luiimiuate, puhoscent 

 beneath jj fruit oval, 4-angled above; nut oblong, thiek-siielled, conspicuously 

 pointed, slightly compressed. — Rich woods in the upper districts of Carolina, 

 Elliott, and noithwanl. March and April. — A large tree, with scaly hark. 



3. C. olivseformis, Nutt. (Pecan-nut.) Leaflets 13-1.5, lanccolato- 

 oblong, serrate falcate, acuminate ; nut olive-shaped, smooth, thin-shollod, some- 

 what 4-angled. — River-lKittoms, Mississipj)!, northward and westward. — A 

 large tree with sinuothish bark. 



