CLASS II. Dicotyledonous Plants 
Stems formed of bark, wood, and pith. Leaves netted- 
veined. Flowers with their parts in 5’s or 4’s. Cotyle¬ 
dons 2. 
FAMILY 9. JUGLANDACEiE. Walnut Family. 
Trees with alternate, odd-pinnate leaves without stip¬ 
ules. Flowers monoecious, the staminate in long and 
drooping catkins. Stamens few or many. Calyx 2-6- 
parted. Fertile flowers solitary or in small clusters. 
Calyx 3-5-lobed, minute petals sometimes present. Ov¬ 
ary inferior, 1-celled or incompletely 2-4-celled. Fruit 
(strictly speaking, a drupe) with a dry husk inclosing a 
bony nut. 
Husk indehiscent; nut rugose. I. Juglans. 
Husk at length splitting into segments; nuts smooth 
or angled. II. Hicoria. 
I. JUGLANS L. 
Staminate catkins cylindrical, solitary, borne on wood 
of the previous year. Stamens numerous, filaments short. 
Calyx 4-6-parted. Pistillate flowers, single or a few to¬ 
gether on a short peduncle at the base of the growth of 
the season. Calyx 4-parted. Petals 4, minute, epigynous. 
Styles 2, short, plumose. Fruit large, roundish or oval, 
husk fibrous-fleshy, becoming dry, indehiscent. Nut bony, 
very rough. 
1. Juglans nigra L. Black Walnut. Leaflets 13-21, ovate- 
lanceolate, serrate, taper-pointed, somewhat cordate or oblique at 
the base, nearly smooth above, downy beneath. Petioles minutely 
downy. Fruit usually single, roundish, about 2' in diameter. 
In rich woods. Common along streams. April-May. 
