14a. Principal stem-leaves pinnatifid =False Foxglove, Gerardia virginica.= 14b. Principal stem-leaves entire =False Foxglove, Gerardia laevigata.= 15a. Corolla hairy on the outside =False Foxglove, Gerardia pedicularia.= 15b. Corolla smooth on the outside =False Foxglove, Gerardia flava.= 16a. Leaves all basal; flowers on leafless stalks (1 dm. high or less; flowers pink or white, summer) =Mudwort, Limosella aquatica var. tenuifolia.= 16b. Leaves opposite (those subtending the flowers may be alternate) --20. 16c. Leaves alternate or irregularly scattered --17. 17a. Leaves entire --18. 17b. Leaves pinnately lobed or incised --8a. 17c. Leaves palmately veined and lobed; stem trailing (flowers blue, summer) =Kenilworth Ivy, Linaria cymbalaria.= 18a. Corolla-tube less than 1 cm. long, spurred --19. 18b. Corolla more than 2 cm. long, not spurred (3-8 dm. high; flowers red-purple, summer) =Snapdragon, Antirrhinum majus.= 19a. Stem and foliage pubescent (1-3 dm. high; flowers blue, summer) =Small Snapdragon, Linaria minor.= 19b. Stem and foliage glabrous (2-6 dm. high; flowers blue, summer) =Toad-flax, Linaria canadensis.= 20a. Leaves with 1 or 2 lobes near the base (3-5 dm. high; flowers purple, summer) =Gerardia, Gerardia auriculata.= 20b. Leaves linear (2-6 dm. high; flowers rose-purple, summer and autumn) (Gerardia) --21. 20c. Leaves lanceolate or broader, not lobed --26. 21a. Pedicels equaling or but little longer than the calyx, and conspicuously shorter than the subtending leaf --22. 21b. Pedicels much longer than the calyx, and generally equaling or exceeding the subtending leaf --24. 22a. Plants of moist ground, bogs, and shores --23. 22b. Plants of dry uplands =Gerardia, Gerardia aspera.= 23a. Corolla about 25 mm. long =Gerardia, Gerardia purpurea.= 23b. Corolla less than 20 mm. long =Gerardia, Gerardia paupercula.= 24a. Stem rough on the angles --25. 24b. Stem glabrous =Gerardia, Gerardia tenuifolia.= 25a. Leaves 2-5 mm. wide =Gerardia, Gerardia tenuifolia var. macrophylla.= 25b. Leaves thread-like, 1 mm. wide or less =Gerardia, Gerardia skinneriana.= 26a. Corolla 16 mm. long, or shorter --27. 26b. Corolla 20 mm. long, or longer --32. 27a. Corolla dull-purple, brown, or greenish; one sterile stamen present (1-2.5 m. high; flowers in summer) (Figwort) --28. 27b. Corolla blue or white (1-4 dm. high) --29. 28a. Sterile stamen purple =Figwort, Scrophularia marilandica.=