. Botany for academies and colleges: consisting of plant development and structure from seaweed to clematis. Botany; 1889. THE FLOWER DEFINED.—THE EMBRYO. these cases the spores (Fig. 1, D) are provided with hairs called dlixB (L. (Alia, hair), and are endued with self-motion. They are therefore called Zoospores, or animal-spores. These little creatures are very social; they dance among them- selves, circling merrily, but never jostling; no human dancers could he more polite; then, when the heyda)' of youth is over, they with- draw their cilise (Fig. 1, E), produce an outer wall, send out root
. Botany for academies and colleges: consisting of plant development and structure from seaweed to clematis. Botany; 1889. THE FLOWER DEFINED.—THE EMBRYO. these cases the spores (Fig. 1, D) are provided with hairs called dlixB (L. (Alia, hair), and are endued with self-motion. They are therefore called Zoospores, or animal-spores. These little creatures are very social; they dance among them- selves, circling merrily, but never jostling; no human dancers could he more polite; then, when the heyda)' of youth is over, they with- draw their cilise (Fig. 1, E), produce an outer wall, send out root-like projections (Fig- 1, F), and develop into staid mother-plants. 15 a. Waked and Covered Spores.—In the lower Crypto- gamia—Seaweeds, etc.—the spores are naked; that is, they have no special cover immediately surrounding them. The plants grow broadly from a common centre, without dis- tinction of stem or leaf; they are called Thallogens (Gr. thallus, a young shoot, gennao, to grow, beget), and may be called Broad-growers. In the higher Cryptogamia—Ferns, etc.—the spores are covered ; the plant-growth is upward, from the top; they are called Acrogens (Gr. akros, top, end, summit), and may be styled Top-growers. 16. Phanerogamia.—A. The female flower is called an Ovule (L. ovulum, little egg); sometimes called Nucleus, or kernel. It usually has two coats (Fig. 3, a) called Seed- coats. The inner coat is called Secundine, or sec- ond coat (though it is first formed). The outer is called Primine, or first coat. The opening in the Secundine is called the Endosiome, or 6, inner mouth (Gr. endon, .within, stoma, mouth). The opening in the primine is called the Exostome, or outer mouth (Gr. exo, outside). The apex of the a n « a ovule (Fig. 3, B D 0 a ^i a, n) points to these mouths. The two coats are attached to the ovule onlv at its base (Fig. 3, A, en,) ; this point ohalaza. B, poUeu-Rrain emitting its tube. C, a, b, e, d, embryo (now is called the become many-cel
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