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** Buttercup.—This seed (fig. 10) differs from the
mustard in that it contains, in addition to the embryo, a certain amount of food-material or endosperm.
In germination, the cotyledons remain in the seed until the food-material is absorbed; they then come above the ground turn green, and act as foliage leaves.
** Comparison of the Bean and the Maizes
Fly. 10. - Butterenp Fruit 4, Embryo; Rn, endoa)ern; ground, En T, terta and perlearp
BEAN
MAIZE
1. A meed.
2. Outer akin is tho testa.
1. Arfruit containing thereed.
2. Ouler covering in the wall
of the fruit and the testa vom-
bined.
3. (ho cotyledon, soed thers
fore monovotyledonous.
4. Food-material atored ip
3. Two cotyledons, Roed
therefore dicotyledonnus.
4. Food-material storel up
in the cotylelons, sood there- nutside the cotyledon, seed
fore exalbuminous.
5. Radicle develop« into pri-
root, bearing
thoroforo albuminous,
Radliclo dous not dewelop
ruol. strongly; ita place in taken by
rout-branches and adventitious
mary
ranobes.
Fonte.
6. Cotyledone remsin below
she gronnd.
7. Plumale becones firststem
bearing laaves.
8. Cotyledan remains in the
sted.
7. Plumulo oonsiste of stenm
and rhenthing loares.
- Oomparison of Mustard and Butterepp.
MUSTARD BUTTERCU" V1, Beed dicotyledonons aad exlbuminous, 2. Cotyledons come abovo the ground. 1. Seed dicotyledonous and albuminous. 2. Cotyledons absorb the en- dosperm and thea oome above the ground.
