Elements of botany: structural, physiological, systematical, and medical by John Lindley

Author:John Lindley
Language: eng
Format: epub
Publisher: Printed for Taylor and Walton, 1841

Petunia violacea. 1. A cross section of ihe ovary. Dulcamara. 3. A section of one of its seeds.

2. Ripe fruit of Solanum

116. — Hydrophyllacea. Herbaceous plants. Leaves usually lobed. Inflorescence often gyrate. Calyx inferior, 6-cleft, with reflexed appendages. Corolla regular. Stamens 5, epipetalous. Ovary simple, 1-celled; placentae 2. Fruit 2-valved. Seeds reticulated ; embryo cartilaginous.

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DE CANDOLLE S SYSTEM.

Uses. —Unknown.

Typical Genera. —Neniophila, Phacelia.

117.— Orobanchacea. Parasitical brown leafless herbs. Calyx permanent. Corolla irregular. Stamens didynamous. Ovary 1-celled, in a fleshy disk, with 2 or more parietal placentae ; stigma 2-lobed. Fruit capsular, many-seeded, en-, closed within the withered permanent corolla; seeds very minute; embryo extremely small, in the apex of albumen.

Uses. —Scarcely known ; they are astringent plants.

Typical Genera. —Orobanche, Lathrsea.

118.— Scrophulariacea, Herbs or shrubs with opposite or alternate exstipulate leaves. Calyx tubular, permanent. Corolla irregular. Stamens didynamous, or 2. Ovary 2-celled; ovules numerous ; stigma 2-lobed. Fruit 2-celled; seeds indefinite or definite, albuminous.

Uses. —Foxglove, whose action upon the pulse is so lowering, is Digitalis purpurea. Gratiola officinalis, some Calceolarias, and others, are purgative and emetic. Euphrasia officinalis is bitter and sub-aromatic. Vandellia diffusa is a powerful antibilious emetic and febrifuge.

Typical Genera. —Scrophularia, Antirrhinum, Pentstemon.

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