10. Chenopodiaceæ—Herbs with jointed stems and small unisexual or bisexual flowers. Stamens usually 5, sometimes 1 or 2, opposite the sepals. Ovary superior. Fruit indehiscent.
B. PLANTS WITH BOTH CALYX AND COROLLA
a. Corolla Monopetalous
1. Ovary Superior and Stamens generally on the Corolla
11. Plantaginaceæ—Herbs with radical entire leaves, and spikes of small, green flowers. Calyx 4-cleft. Corolla 4-lobed, scarious. Stamens 4. Ovary 2- to 4-celled. Fruit many-seeded.
12. Plumbaginaceæ—Herbs with radical or alternate leaves, and (generally) regular, blue flowers. Calyx tubular, scarious. Corolla of 5 petals, united below. Stamens 5, opposite the petals, attached below the ovary. Ovary 1-celled and 1-seeded.
13. Primulaceæ—Herbs with (generally) radical leaves and conspicuous, regular flowers. Calyx 4- to 7-cleft. Corolla 4- to 7-cleft. Stamens 4 to 7, generally opposite the petals. Ovary 1-celled. Fruit a capsule with many seeds.
14. Solanaceæ—Herbs with alternate leaves and axillary clusters of regular flowers. Calyx 5-cleft. Corolla 5-cleft. Stamens 4 or 5. Ovary 2-celled. Fruit a berry.
15. Convolvulaceæ—Climbing herbs with alternate leaves and showy, regular flowers. Sepals 5. Corolla 4- or 5-lobed. Stamens 4 or 5. Ovary 2- to 4-celled. Fruit a capsule.