SYNOPSIS OF THE GENERA. 
hardened four angled tube of the perianth.— Herbaceous 
plants, with unequal pinnate leaves. 
** Flowers with a single perianth, the barren ones in catkins. 
20. Qurr'cus, [Page 1205.] Barren flowers in lax pendulous 
catkins. Perianth single, lacerated. Stamens five to ten. 
Fertile flowers with an involucre of numerous small 
scales, united into a cup. Perianth single, closely invest- 
ing and adhering to the ovary, six toothed. Ovary three 
celled, two of the cells abortive. Stigmas three. Fruit 
(acorn) one celled, single seeded, surrounded at the base 
by the cup-shaped involucre.—Large forest trees, with 
hard durable wood. 
21. Casta'neaA, [Page 1210.] Barren flowers in very long 
irregular clustered catkins. Perianth single, six cleft. 
Stamens five to twenty. Fertile flowers three, within a 
thick four lobed involucre, very spiny on the outside. 
Perianth single, urceolate, five or six lobed, and with the 
rudiments of twelve stamens, smooth on the outside, lined 
with a stout shining coat of hairs within. Ovarium six 
celled, incorporated with the perianth, six celled, each cell 
two seeded, five of which are mostly abortive. Styles six. 
Fruit a sub-rotundate one to three seeded nut, enveloped 
in the enlarged spiny involucre.—Large forest trees, with 
elliptic-lanceolate leaves. 
22. Fa’cus, [Page 1212.] Barren flowers in a globose catkin, 
pendulous. Perianth single, bell-shaped, six cleft. Sta- 
mens five to twelve. Fertile flowers two in a four lobed 
prickly involucre. Perianth single, urceolate, four or 
five lobed, adhering to the ovary. Styles three, Ova- 
vium three angled, three celled, Fruit a three angled 
nut, three celled, two of which are abortive, one or two 
seeded, invested with the enlarged involucre.—Large 
forest trees, with ovate lanceolate leaves. 
23. Cory'Lus, [Page 1214.] Barren flowers in a cylindrical 
catkin, its scales three lobed, the middle one largest, and 
covering the lateral ones. Stamens eight. Anthers one 
celled. Fertile flowers numerous (perianth obsolete), 
enclosed in a scaly bud. Stigmas two. Fruit a one 
seeded nut, invested at the base with the united coriaceous 
scales of the involucre.—Large branching shrub. 
Celtetn, 
