. Domestic botany. Botany, Economic; Botany. 186 DOMESTIC BOTANY. CLASS IV.—GYMNOSPEEMS. {Gijmnogens. Lindley.) Seed a naked ovule; embryo with one cotyledon (Cycads) or two or more (Conifers). Leaves free veined. Stems endogenous (Cycads) or exogenous (Conifers). Fig. d. Leaf of ditto ; e. Section of stem of Cycas. The mode of fertilization and nature of the seeds (fruit) of the plants in this family is of a special cha- racter. The flowers so called are unisexual, and desti- tute of calyx and corolla; the male consists of sessile anthers, seated on the scales of cones or catkins, the fe
. Domestic botany. Botany, Economic; Botany. 186 DOMESTIC BOTANY. CLASS IV.—GYMNOSPEEMS. {Gijmnogens. Lindley.) Seed a naked ovule; embryo with one cotyledon (Cycads) or two or more (Conifers). Leaves free veined. Stems endogenous (Cycads) or exogenous (Conifers). Fig. d. Leaf of ditto ; e. Section of stem of Cycas. The mode of fertilization and nature of the seeds (fruit) of the plants in this family is of a special cha- racter. The flowers so called are unisexual, and desti- tute of calyx and corolla; the male consists of sessile anthers, seated on the scales of cones or catkins, the female being represented by an ovule only, destitute of ovary, style, and stigma; fertilization being effected by the pollen coming in direct contact with the apex of the naked ovule, which in time becomes an albuminous nut- seed, destitute of a true seed Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smith, John, 1798-1888. London, L. Reeve and co.
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