All 
downy beneath when young, finely serrate, the three upper obovate-lanceolate, the 
lower pair much smaller and oblong-lanceolate, all taper-pointed: fruit globular or 
depressed: nut white, flattish-globular, barely mucronate, thin-shelled. (Juglans 
ovata Mill. Carya alba Nutt.)—Extending into eastern Texas. 
3. H. sulcata (Willd.) Britton. (BIG SHELL-BARK, KING-NUT.) Large tree, with 
bark as in the last: leaflets 7 or 9, more downy beneath: fruit oval or ovate, 4-ribbed 
abovethe middle, the hull very thick: nut large (3 to 5 em. long) and usually anguiar, 
dull white or yellowish, thick-shelled, usually strongly pointed at both ends. (Jug- 
lans sulcata Willd. Carya sulcata Nutt.)—Rich soils, extending into eastern Texas 
from the North Atlantic States, 
4. H. alba (L.) Britton. (Mockrr-NUT. WIHITE-HEART HICKORY.) Large tree, 
with bark close and rough, but not shaggy and exfoliating on old trunks: catkin- 
shoots and lower leaf-surfaces tomentose when young, resinous-scented : leaflets 7 or 9, 
lance-obovate, or the lower oblong-lanceolate, pointed: fruit globular or ovoid, 
with very thick and hard hull: nut globular, not compressed, 2 to 2.5 cm. in diame- 
ter. (Juglans alba L. Carya tomentosa Nutt.)—Extending to the valley of the Brazos. 
5. H. myristiceformis (Michx. f.) Britton. Bark not exfoliating: leaflets 5, ovate- 
lanceolate, smooth, the terminal one sessile: fruit oval, rugose, rough: nut oval, 
slightly acuminate, furrowed, very hard. (Juglans myristicafolia Michx. f. Carya 
myristiceformis Nutt.)—From the Gulf States to central Mexico. Fruit resembles 
nutmegs. 
+ + Hull thin and rather friable at maturity, 4-valved only to the middle (except C. 
aquatica): seed more or less bitter: bark not exfoliating. 
6. H. glabra (Mill.) Britton. (PiG-NuT or BROOM HICKORY.) Rather large tree, 
with bud seales nearly asin C. tomentosa, but smaller, caducous: shoots, catkins and 
leaves glabrous or nearly so: leaflets 5 or 7, oblong- or obovate-lanceolate, taper- 
pointed, serrate: fruit pear-shaped, oblong or oval (3.5 to 5 em. long), with thick 
bony shell: the oily seed at first sweet, then bitterish. (Juglans glabra Mill. Carya 
glabra Torr. C. porcina Nutt.)—Extending to the valley of the Nueces, 
7. H. minima (Marsh.) Britton. Tree 15 to 25 m. high: scales of the small yellowish 
buds about 6, valvate in pairs, caducous in leafing: catkins and young herbage more 
or less pubescent, soon becoming glabrous: leaflets 7 to 11, lanceolate or oblong- 
lanceolate: fruit globular, narrowly 6-ridged: nut globular, short-pointed, white, 
barely 2.5 cm. long, thin-shelled: seed at first sweet, soon extremely bitter. (Juglans 
alba, var. minima Marsh. Carya amara Nutt.)—Moist soils, extending to the valley 
of the Trinity. 
8. H. aquatica (Michx.f.) Britton, Small tree, with roughish bark: leaflets 9 to 13, 
lanceolate, acuminate, slightly serrate, smooth: fruit roundish,4-ribbed: hull 4-parted 
to the base: nut compressed, 4-angled: seed much wrinkled. (Juglans aquatica 
Michx. f. Carya aquatica Nutt.)—River swamps, extending from the Gulf States to 
the valley of the Brazos. 
2. JUGLANS L. (WALNUT.) 
Trees, with strong-scented or resinous-aromatic bark, few-sealed or 
almost naked buds, odd-pinnate leaves of many leaflets, sterile flowers 
in long and simple lateral catkins from the wood of the preceding year 
with the 3 to 6-cleft calyx adherent to the entire bracts or scales and 
12 to 40 stamens with free and very short filaments, fertile flowers 
selitary or several together on a peduncle at the end of the branches 
bearing a 4-toothed calyx and 4 small petals at the sinuses, 2 very 
skort styles, 2 subclavate and fringed stigmas, and fruit with a fibrous- 
fleshy indehiscent exocarp and an irregwarly rough endocarp and a 
sweet edible embryo. 
