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 pubescent
--47.

46b. All leaves serrate; foliage pubescent (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) =Butterwort, 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.=

3b. Flower-stalk without bracts, except at the base of the pedicels
=Bladderwort, Utricularia purpurea.=

4a. Stem and numerous dissected leaves floating in water
=Bladderwort, Utricularia vulgaris var. americana.=

4b. Stem and minute leaves creeping on the bottom of ponds or in
mud, while the flowers are borne on erect stalks, easily
detached from the delicate stems --5.

5a. Upper lip of corolla conspicuous, as long or nearly as long as the
lower lip; lower lip with a prominent raised palate --6.

5b. Upper lip of corolla half as long as the lower lip, or less --7.

6a. Spur of corolla very short and blunt
=Bladderwort, Utricularia gibba.=

6b. Spur of corolla very long and slender
=Bladderwort, Utricularia cornuta.=

7a. Spur of corolla very short and blunt, or almost none