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Updated: June 15, 2025
'Cotyledons, aren't they? said I. 'I don't know what they are in botany, said she; 'but I know the use of 'em. They'll last a while, and help feed up what's growing inside and underneath, and by and by they'll drop off, when they're done with, and you'll see what's been coming of it. Folks can't live the best right out at first, any more than plants can.
Their chief point of variance, however, from the cotyledons is that they are flat, delicate, and formed like real leaves generally. They are wholly green, rest on a visible node, and can no longer deny their relationship to the following leaves of the stalk, to which, however, they are usually still inferior, in so far as that their margin is not completely developed.
The palmate form of the cotyledons of the genus Pinus is particularly conspicuous in those of P. pinea.
Others appear in bad weather, and will thus be retarded in their development. These effects are of a cumulative nature as the young plants must profit by every hour of sunshine, according to the size of the cotyledons. Any inequality between two young seedlings is apt to be increased by this cumulative effect. The same holds good for the soil of the bed.
Here a corolla of needles forms at the same time a calyx, and we shall have occasion to remember the present case in connection with similar phenomena later. "On the other hand, we observe that even the cotyledons which are most like a leaf when compared with the following leaves of the stalk are always more undeveloped or less developed.
By a similar mental effort as applied to the leaf-formations we strive to build up a complete plant. We start with the seed, from which we first imagine the cotyledons unfolding, letting this be followed by the gradual development of the entire green part of the plant, its stem and leaves, until the final leaves change into the sepals of the calyx.
Still, though the form is different, the purpose of the two cotyledons and the juicy stem in the seedling Opuntia is the same as in the Cereus; and, as the growing point develops, the cotyledons shrivel up and fall off, the plant food they contained having passed into that part of the young seedling which was to be permanent.
Thus calves and lambs can walk about in a few minutes after their birth; while puppies and kittens remain many days without opening their eyes. And though on the separation of the cotyledons of ruminating animals no blood is effused, yet this is owing clearly to the greater power of contraction of their uterine lacunæ or alveoli. See Medical Essays, Vol. V. page 144.
I guess we all want some kind of cotyledons." Mrs. Gartney's eyes shone with affection, and something that affection called there, as she looked upon her daughter. "I guess the cotyledons won't hinder your growing," said she. And so, in a few days after, Mahala was dismissed, and Faith took upon herself new duties.
Therefore I will now point out some circumstances, which are ordinarily different on various parts of one and the same bed. In the first place comes the inequality of the seeds themselves. Some of them will germinate earlier and others later. Those that display their cotyledons on a sunny day will be able to begin at once with the production of organic food.
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