. The Pharmaceutical era. outer coat or testa; (te) Inner coator tegmen; (c1 cotyledons; (r) albumin or reserve. egg, and are of a nitrogenous character. In the seedthe so-called albumin consists of other than substancescontaining Nitrogen, as starch, oil, etc. A seed contain-ing so-called albumin is said to be albuminous (). One without it is said to be ex-albuminous(Figs. 118-120). Among albuminous seeds may be men-tioned Nux Vomica, Oastor Oil, Stramonium, etc. Illus-trations of ex-albuminous seeds are xVlmond, Melon, Coats.—There have been equally great changes inthe c
. The Pharmaceutical era. outer coat or testa; (te) Inner coator tegmen; (c1 cotyledons; (r) albumin or reserve. egg, and are of a nitrogenous character. In the seedthe so-called albumin consists of other than substancescontaining Nitrogen, as starch, oil, etc. A seed contain-ing so-called albumin is said to be albuminous (). One without it is said to be ex-albuminous(Figs. 118-120). Among albuminous seeds may be men-tioned Nux Vomica, Oastor Oil, Stramonium, etc. Illus-trations of ex-albuminous seeds are xVlmond, Melon, Coats.—There have been equally great changes inthe coats of the ovules. They are now the coats of theseed. Generally the two are distinguishable from eachother, as in Ricinus, Pepo, etc. When there are twocoats, the inner, as a rule, is light in color and of adelicate structure and is called Tegmen (or Endopleu-ra). The outer coat is generally dark in color, rarelylight (as in Pepo, Melon, etc.), and is firm in outer coat is called Testa (or .Spermoderm or. Bpisperm). In some cases the two coats are united soclosely that they are not easily to be distinguished. Embryo.—The embryo develops a root and stem por-tion. The latter bears the rudimentary seed leaves orCotyledons (Figs. 115-120). The number of the lattervaries in two great classes of plants, viz., the Monocoty-ledons and the Dicotyledons. In the Monocotyledons,as oats, corn, colchicum, lily-of-the-valley, etc., there isbut one cotyledon or seed-leaf. In the Dicotyledons,,comprising much the larger proportion of plants of ourtemperate regions, the cotyledons are, as the name indi-cates, two in number. The position of the tip of the root is always in the di-rection of the opening of the seed (Figs. 115-120). Theopening of the ovule for the entrance of the pollen tubewas termed foramen. In the seed it is more or less closedand is termed Micropyle. The seed when ripe is de-tached from its stalk, and the scar left at this point ofattachment is called the Hi
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Keywords: ., bookcentury1800, booksubjectdrugs, booksubjectpharmacy, bookyear1
