96 MIRbfiL'S CLASSIFICATION OF FRUITS. 
Synoposis ofMirbePs Orders and Genera of Pericarps. 
CLASS L / 
Fruit naked, Gymnocarpes. 
OfiDBX I. Caecekulabes, simple fruits, remaining closed. 
fl. Cypsela, 
Genera, < 2. Cerion, 
Is. Carcerula. 
Ohdbh 3. CAPstTLAREs, Simple fruits, which open at maturity. 
n. Capsule, 
Genpra J ^' Le^?ume, 
crenera, < ^ g^j^^^ ^^^^ g-^-^j^^ 
14. Pyxides. 
Obder 3. DiEHSsiuA, simple fruits, which divide into many parts when ripa 
fl. Cremocarp, 
Genera, < 2. Regmate, 
Is. Dieresil. 
Order 4. Etaihonnaiii, compound fruits, proceeding from a germ to which the styla 
adheres. ' 
Gpnpra \ ^' Double Follicle, 
Crenera, ^ Etairon. 
Order 5. Cenobionnair, compc>>wd fruits, proceeding from a germ not beamg the 
style. 
Genera, i i, >nobium. 
Order 6. Drxjpaces, simple and succulent iri^its, contained in a nut. 
Genera, ■{ 1. D.-vno. 
Order 7. Baccati, simple, succulent fruits, co»"*<»ining many separate seeds. 
{1. Pyridion, 
2. Pepo, 
3. Dacca. 
CLASS IL 
Covered fruits, Angiocarpes. 
fl. Calybion, 
Gpnprn J 2. Strobilum, 
brenera, < ^ Sycone, 
' 4. Serosa 
LECTURE XV. 
THE SEED — SYNOPOSIS OF THE EXTERNAL ORGANS OF PLANTS. 
The seed may be considered as that link in the chain of vegetabJe 
existence which connects the old and new plant ; were this destroyed, 
were nature to fail in her operation of perfecting the seed, what a 
change would the earth soon exhibit ! One year would sweep away 
the whoie tribe of annual plants; beautiful flowers, medicinal herbs, 
and our most important grains for the sustenance of ma n and beast, 
would vanish for ever. Another year would take from us many of 
our most useful garden vegetables, and greatly reduce the number 
of our ornamental plants. Year after year the perennials would 
vanish, until the earth would present but one vast scene of vegetable 
ruin. The ancient pines and venerable oaks, instead of the smiling 
aspect of ever-renovating nature which they now witness, would 
stand alone in solitary grandeur, the mournful remains of a once 
Repeat the Syiiopysis of Mirbel's classification— What is the seed? its form— What 
would be the appearance of the eartli, if plants should cease to produce perfect seed 
