ulate, 2 of its teeth different in size from the
other 3 (4-8 dm. high; flowers pink-purple, in terminal
clusters in summer) --14.

11a. Corolla scarlet =Oswego Tea, Monarda didyma.=

11b. Corolla bright crimson or rose-red
=Wild Bergamot, Monarda fistulosa var. rubra.=

11c. Corolla white, pink, pale-purple, or yellowish --12.

12a. Flower-clusters all terminal --13.

12b. Flower-clusters both terminal and axillary
=Horse Mint, Monarda punctata.=

13a. Leaves and stem with soft spreading pubescence
=Wild Bergamot, Monarda fistulosa.=

13b. Leaves and stem grayish with fine appressed pubescence
=Wild Bergamot, Monarda mollis.=

14a. Upper calyx-teeth about 3 times as long as the lower
=Blephilia, Blephilia hirsuta.=

14b. Upper calyx-teeth but little longer than the lower
=Blephilia, Blephilia ciliata.=

15a. Calyx with a distinct protuberance on the back of the upper side
(Skullcap) --16.

15b. Calyx without a distinct protuberance --20.

16a. Corolla 5-8 mm. long; flowers in axillary racemes (3-8 dm.
high; flowers blue, in summer)
=Mad-dog Skullcap, Scutellaria lateriflora.=

16b. Corolla 6-10 mm. long; flowers axillary, solitary (1-3 dm.
high; flowers violet, early summer)
=Skullcap, Scutellaria parvula.=

16c. Corolla 12-30 mm. long; flowers axillary or in terminal
racemes (4-8 dm. high; flowers blue, summer) --17.

17a. Stem-leaves cordate =Skullcap, Scutellaria versicolor.=

17b. Stem-leaves not distinctly cordate --18.

18a. Stem-leaves sessile or nearly so; plant of swamps and
river-banks =Skullcap, Scutellaria galericulata.=

18b. Stem-leaves with petioles 1 cm. or more long; plants of dry or
moist woods --19.

19a. Stem glandular-pubescent toward the summit; corolla 16 mm. long or
less =Skullcap, Scutellaria pilosa.=

19b. Stem not glandular; corolla 20 mm. long
=Skullcap, Scutellaria incana.=

20a. Calyx-teeth 5, all equal or nearly so at the time of flo