1716 ARBORETUM AND FRUTICETUM. PART III. 
a large scar at the base: they have 1 cell, and 1, 2, or 3 seeds. — 
Species few. Natives of the temperate zone of the northern hemisphere. 
Leaves alternate, annual, feather-veined, plaited in the bud. (7. Nees ab 
Esenbeck Gen. Fl. Germ.; Smith Eng. Fl., iv. p.150—152.; and obser- 
vation. 
ae Lin. Flowers unisexual; those of the two sexes in distinct cat- 
kins upon the same plant. — Male flowers in cylindrical catkins. Bracteas 
sessile, imbricate. Two perigonial scales, that cohere at the base, are 
adnate to the under surface of the bracteal scale. Stamens 8, inserted 
upon the perigonial scales towards their base, and in about the line of their 
cohesion. Anthers bearded at the tip of one cell. — Female flowers in a 
bud-like catkin, which is developed into a branchlet : the flowers are borne 
at its tip. Bracteal scales ovate, entire. Ovaries many, very minute ; 
grouped; each invested with minute, lacerated, villous, involucral scales, 
that cohere at the base; having 2 cells, each including 1 ovule, and this 
apparently erect when young, pendulous when adult. Calyx not obvious ; 
formed of a slightly villous membrane, that covers the ovary to the tip, and, 
as the ovary progresses to a nut, adheres to it most closely, and becomes 
part of the shell. Stigmas 2, long, thread-shaped.—Fruit. Nut ovate; 
included in a large, leafy, tubular involucre, that is lacerate at the tip ; 
without valves, or, very rarely, with 2; scarred at the base; by abortion, 
l-seeded. Seed adhering to the remains of the dissepiment. — Species 
few. Large shrubs and trees, occurring in the colder zones of the 
northern hemisphere. Leaves alternate, entire, feather-veined. Flowers 
protruded before the leaves. (7. Nees ab Esenbeck Gen. Pl. Fl. Germ., and 
observation. ) 
Ca’rpinus Tourn. Flowers unisexual; those of the two sexes in distinct 
catkins upon one plant. — Male flowers. The catkin lateral, sessile, cylin- 
drical. The bracteas imbricate. The flower consists of 12 or more sta- 
mens, inserted at the base of a bractea. Anthers bearded at the tip, 1- 
celled.— Female flowers in lax terminal catkins. Bracteas of 2 kinds, 
outer and inner: outer bracteas entire, soon falling off; inner bracteas 
in pairs, each 3-lobed, with the side lobes much the smaller, forming an 
involucre about an ovary. Calyx clothing the ovary to near its tip, and 
adhering to it; toothed at the tip. Ovary with 2 cells, an ovule in each ; 
the ovule early pendulous: one of them becomes abortive. Style very 
short. Stigmas 2, long, thread-shaped.— Fruit. Nut attended by the 
involucre, and ovate, compressed, ribbed, clothed except at the base, and 
tipped with the adnate thin calyx; woody; including one seed.—Species 
about 3. Natives of Europe, the Levant, and North America. Leaves 
alternate, annual, feather-veined, plaited in the bud. (7. Nees ab Esenbeck 
Gen. Pl. Fl. Germ. Illustr.) 
O’strya Michw. Flowers unisexual; those of the two sexes in distinct cat- 
kins upon the same plant. — Male flowers. The bracteas of the catkin 
simple, imbricate. Flower of 12 or more stamens, inserted at the base 
of a bractea; filaments branched, each branch bearing an anther ; anthers 
each of 1 cell. — Female flowers. Bracteas small, deciduous. Involucral 
scales in pairs, hairy at the base, the pair growing together at their opposed 
edges, and constituting an inflated covering to the ovary, which it conceals. 
Calyx investing the whole ovary, and extended at the tip into a very short 
ciliate tube. Ovary having two cells, and 1 ovule in each. Style short. 
Stigmas 2, long, thread-shaped. — Fruit a nut, minute, ovate, even ; bearded 
at the tip ; 1-seeded from abortion; covered by an inflated, nerved, mem- 
branous involucre. The fruits of a catkin imbricately disposed into an 
ovate spike.—Species few. Trees, natives of the temperate zones of both 
hemispheres. Leaves alternate, annual, feather-veined. (7. Nees ab Esen- 
beck, and observation. ) 
