35 WOODY PLANTS OF MASSACHUSETTS. 
cherry, is called a drupe. A samara is a nut with a winged 
margin, like the key of the maple or the winged seed of the elm. 
A capsule is a dry fruit formed of a compound ovary and open- 
ing of itself, as the seed-vessel of kalmia, or shedding its seed 
through chinks, as in the poppy. A pome is an apple, or a fruit 
resembling an apple.* 
On most of the trees of temperate regions, the flowers are in- 
complete; wanting corolla or calyx or both, and having their 
* EXPLANATION OF THE Ficgures.—1. A flower of the common cherry, Cérasus 
vulgaris, showing (a, a,) the petals of the corolla, and (2) the stamens. 2. A 
separate petal. 3. A calyx laid open, showing (d, d@,) the divisions or sepals, 
(b) the stamens springing from the inner edge of the calyx, (c) the pistil occupying 
the centre of the flower, and consisting of an ovary, surmounted by a style crowned 
with astigma. 4. Astamen, consisting of (f) the filament, and (h) the anther. 5. A 
pistil magnified, showing (c) the ovary, (s) the style, (e) the stigma. 6, An ovary 
much magnitied and laid open, showing (g) the ovule suspended within. 7. Ver- 
tical section of the fruit or drupe of a cherry, showing the embryo in the centre 
with the radicle superior, or at the top. 8. The embryo taken out, with the cotyle- 
dons (2) partly expanded, the radicle (7), with the plumule (») lying between the 
cotyledons. 9. An embryo germinating; (2, 7,) the cotyledons or seed-leaves with 
the plumule (p), now becoming leaves, between them ; (¢) the stem; and (7) the 
radicle, now become the root of the young plant. 10. A vertical section of a seed 
of the barberry, Bérderis vulgaris, magnified, and showing the embryo with its 
leaf-like cotyledons (2) and tapering radicle (r), immersed in albumen (wz). 
