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 p.u.b.escent (flowers purple) =Blue Hearts, Buchnera americana.=

35a. Stem finely p.u.b.escent (3-6 dm. high; flowers pale-violet, late spring) =Beard-tongue, Pentstemon hirsutus.=

35b. Stem glabrous below the inflorescence (6-12 dm. high) --36.

36a. Corolla-tube gradually enlarged from base to tip (flowers pale-violet, in early summer) =Beard-tongue, Pentstemon laevigatus.=

36b. Corolla-tube abruptly enlarged just beyond the calyx (flowers white, early summer) =Beard-tongue, Pentstemon laevigatus var. digitalis.=

37a. Corolla distinctly irregular, 2-lipped (1-4 dm. high; flowers yellowish or white, summer) --38.

37b. Corolla regular or nearly so and 2-lobed, or none --6a.

37c. Corolla regular or nearly so, 4-lobed --40.

38a. Leaves narrowed at the base, with mid-vein =Hedge Hyssop, Gratiola virginiana.=

38b. Leaves rounded or somewhat clasping at the base, with 3-5 princ.i.p.al veins (False Pimpernel) --39.

39a. Peduncles longer than the subtending leaves =False Pimpernel, Ilysanthes anagallidea.=

39b. Peduncles shorter than the subtending leaves =False Pimpernel, Ilysanthes dubia.=

40a. Leaves whorled (8-20 dm. high; flowers white or pale-blue, in spikes, summer) =Culver's Root, Veronica virginica.=

40b. Leaves alternate or opposite (Speedwell) --41.

41a. Flowers in racemes, which arise from the axils of the opposite leaves (flowers pale-blue to nearly white, late spring and summer) --42.

41b. Flowers solitary in the axils of leaf-like bracts, or in terminal bracted racemes (1-4 dm. high; spring and summer) --46.

42a. Stem and foliage glabrous; swamp plants 2-7 dm. high --43.

42b. Stem and foliage p.u.b.escent; plants of dry ground, 1-3 dm. high --45.

43a. Leaves linear or narrowly lanceolate =Marsh Speedwell, Veronica scutellata.=

43b. Leaves ovate or ovate-lanceolate --44.

44a. Stem-leaves sessile and somewhat clasping =Water Speedwell, Veronica anagallis-aquatica.=

44b. Stem-leaves on short petioles =Brooklime, Veronica americana.=

45a. Leaves narrowed at base into a petiole =Speedwell, Veronica officinalis.=

45b. Leaves rounded or heart-shape at the base =Speedwell, Veronica chamaedrys.=

46a. Bracteal leaves entire; stem glabrous or minutely p.u.b.escent --47.

46b. All leaves serrate; foliage p.u.b.escent (flowers blue) --48.

47a. Flowers white, about 2 mm. wide =Speedwell, Veronica peregrina.=

47b. Flowers pale-blue with darker stripes, 3-4 mm. wide =Speedwell, Veronica serpyllifolia.=

48a. Flowers nearly sessile, about 2 mm. wide =Speedwell, Veronica arvensis.=

48b. Flowers on slender pedicels, 5-8 mm. wide =Speedwell, Veronica tournefortii.=

LENTIBULARIACEAE, the Bladderwort Family

Small herbs, growing on rocks, in mud, or in water; calyx and corolla both 2-lipped; stamens 2, attached to the corolla; ovary 1-celled.

1a. Corolla purple --2.

1b. Corolla yellow (flowers in summer) (Bladderwort) --4.

2a. Leaves oval to elliptical, entire (about 1 dm. high, on rocks; flowers in summer) =b.u.t.terwort, Pinguicula vulgaris.=

2b. Leaves dissected or none, submerged (flowers in summer) (Bladderwort) --3.

3a. Flower-stalk with a single bract near the middle =Bladderwort, Utricularia resupinata.=