14. Micranthemum. Flowers minute. Calyx 4-toothed or cleft. Upper lip of corolla short or none. Filaments with an appendage; sterile pair none. Dwarf aquatic.
II. RHINANTHIDEÆ. Under lip or the lateral lobes of the corolla covering the upper in the bud. Capsule commonly loculicidal.
Tribe V. DIGITALEÆ. Corolla wheel-shaped, salver-shaped, or bell-shaped. Stamens 2 or 4, not approaching in pairs nor strongly didynamous; anthers 2-celled.
15. Synthyris. Calyx 4-parted. Corolla bell-shaped, 2–4-lobed, irregular. Stamens 2 or 4. Leaves alternate. Flowers racemed.
16. Veronica. Calyx 4-(rarely 3–5-) parted. Corolla wheel-shaped or salver-shaped, almost regular. Stamens 2. Leaves chiefly opposite or whorled. Flowers racemed.
Tribe VI. GERARDIEÆ. Corolla with a spreading and slightly unequal 5-lobed limb. Stamens 4, approximate in pairs. Leaves opposite, or the uppermost alternate.
[*] Corolla salver-shaped. Anthers 1-celled. Flowers in a spike.
17. Buchnera. Calyx tubular, 5-toothed. Limb of the elongated corolla 5-cleft.
[*][*] Corolla bell-shaped to funnel-form; anthers 2-celled.
18. Seymeria. Stamens nearly equal. Tube of the corolla broad, not longer than the lobe.