The Elements of Botany, For Beginners and For SchoolsGray, Asa
Science
The Elements of Botany, For Beginners and For Schools
Gray, Asa
Plants
349. In respect to texture or consistence, fruits may be distinguished
into three kinds, viz.--
_Fleshy Fruits_, those which are more or less soft and juicy throughout;
_Stone Fruits_, or _Drupaceous_, the outer part fleshy like a berry,
the inner hard or stony, like a nut; and
_Dry Fruits_, those which have no flesh or pulp.
350. In reference to the way of disseminating the contained seed, fruits
are said to be
_Indehiscent_ when they do not open at maturity. Fleshy fruits and stone
fruits are of course indehiscent. The seed becomes free only through
decay or by being fed upon by animals. Those which escape digestion are
thus disseminated by the latter. Of dry fruits many are indehiscent; and
these are variously arranged to be transported by animals. Some burst
irregularly; many are
_Dehiscent_, that is, they split open regularly along certain lines, and
discharge the seeds. A dehiscent fruit almost always contains many or
several seeds, or at least more than one seed.
[Illustration: Fig. 371. Leafy shoot and berry (cut across) of the
larger Cranberry, Vaccinium macrocarpon.]
[Illustration: Fig. 372, 373. Pepo of Gourd, in section. 373. One carpel
of same in diagram.]
[Illustration: Fig. 374. Longitudinal and transverse sections of a pear
(pome).]
351. The principal kinds of fruit which have received substantive names
and are of common use in descriptive botany are the following. Of fleshy
fruits the leading kind is
352. =The Berry=, such as the gooseberry and currant, the blueberry and
cranberry (Fig. 371), the tomato, and the grape. Here the whole flesh is
soft throughout. The orange is a berry with a leathery rind.
353. =The Pepo=, or _Gourd-fruit_, is a hard-rinded berry, belonging to
the Gourd family, such as the pumpkin, squash, cucumber, and melon, Fig.
372, 373.
354. =The Pome= is a name applied to the apple, pear (Fig. 374), and
quince; fleshy fruits, like a berry, but the principal thickness is
calyx, only the papery pods arranged like a star in the core really
belonging to the carpels. The fruit of the Hawthorn is a drupaceous
pome, something between pome and drupe.
355. Of fruits which are externally fleshy and internally hard the
leading kind is
356. =The Drupe=, or _Stone-fruit_; of which the cherry, plum, and peach
(Fig. 375) are familiar examples. In this the outer part of the
thickness of the pericarp becomes fleshy, or softens like a berry, while
the inner hardens, like a nut. From the way in which the pistil is
constructed, it is evident that the fleshy part here answers to the
lower, and the stone to the upper face of the component leaf. The layers
or concentric portions of a drupe, or of any pericarp which is thus
separable, are named, when thus distinguishable into three portions,--
_Epicarp_, the external layer, often the mere skin of the fruit,
_Mesocarp_, the middle layer, which is commonly the fleshy part, and
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