nd
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.=

28b. Sterile stamen yellow =Figwort, Scrophularia leporella.=

29a. Flowers nearly or quite sessile (summer) --30.

29b. Flowers on pedicels 10 mm. long or more (spring) --31.

30a. Foliage-leaves prominently toothed --6b.

30b. Foliage-leaves entire, or with 1 or 2 small teeth at the base
=Cow Wheat, Melampyrum lineare.=

31a. Corolla more than 10 mm. long, blue and white
=Blue-eyed Mary, Collinsia verna.=

31b. Corolla 5-8 mm. long, blue and white
=Collinsia, Collinsia parviflora.=

32a. Flowers solitary in the axils of the upper foliage-leaves (4-8
dm. high; flowers blue, in summer) (Monkey Flower) --33.

32b. Flowers in dense terminal or subterminal spikes (3-9 dm. high;
summer) --34.

32c. Flowers in loose terminal panicles (flowers white or
pale-violet) (Beard-tongue) --35.

33a. Leaves clasping at the base =Monkey Flower, Mimulus ringens.=

33b. Leaves petioled, not clasping =Monkey Flower, Mimulus alatus.=

34a. Stem and foliage glabrous (flowers white)
=Turtlehead, Chelone glabra.=

34b. Stem and foliage pubescent (flowers pur