34a. Leaves ovate to oblong, acute; flowers pink, white, or pale purple (6-15 dm. high; summer) =Catnip, Nepeta cataria.= 34b. Leaves nearly circular or kidney-shape; flowers blue (creeping; flowers in spring and summer) =Ground Ivy, Nepeta hederacea.= 35a. Flowers in terminal spikes, or the lower axillary (3-8 dm. high; flowers pink-purple or white, summer) (Mint) --36. 35b. Flowers all in axillary whorls (flowers pink-purple or white, summer) (Mint) --38. 35c. Flowers in terminal capitate corymbed clusters (4-8 dm. high; flowers white or dotted with purple, summer) (Mountain Mint) --41. 36a. Leaves sessile or with very short petiole =Spearmint, Mentha spicata.= 36b. Leaves with manifest petioles --37. 37a. Principal leaves less than half as broad as long =Peppermint, Mentha piperita.= 37b. Principal leaves more than half as broad as long =Bergamot Mint, Mentha citrata.= 38a. Stem glabrous; leaves ovate to obovate (4-8 dm. high) =Downy Mint, Mentha gentilis.= 38b. Stem pubescent, at least on the angles (1-6 dm. high) --39. 39a. Principal leaves distinctly petioled and somewhat rounded at base =Wild Mint, Mentha arvensis.= 39b. Leaves tapering to the base --40. 40a. Leaves and stem pubescent =Wild Mint, Mentha arvensis var. canadensis.= 40b. Leaves glabrous; stem pubescent on the angles only =Wild Mint, Mentha arvensis var. glabrata.= 41a. Leaves linear; calyx-teeth awl-shape =Mountain Mint, Pycnanthemum flexuosum.= 41b. Leaves narrowly lanceolate; calyx-teeth triangular-ovate =Mountain Mint, Pycnanthemum virginianum.= 42a. Stems decumbent to diffuse; leaves cordate to nearly circular (stems 2-5 dm. long or high; flowers in spring and summer) (Dead Nettle) --43. 42b. Stem erect; leaves palmately cleft; calyx-teeth spiny (6-15 dm. tall; flowers pink, in summer) =Motherwort, Leonurus cardiaca.= 42c. Stems erect or ascending; leaves ovate-lanceolate to linear (summer) --45. 43a. Upper leaves closely sessile (flowers red-purple) =Dead Nettle, Lamium amplexicaule.= 43b. Leaves all petioled --44. 44a. Flowers red or purple =Dead Nettle, Lamium maculatum.= 44b. Flowers white =Dead Nettle, Lamium album.= 45a. Flowers 2-2.5 cm. long, in loose terminal spikes (5-10 dm. tall; flowers rose-color) =False Dragon Head, Physostegia virginiana.= 45b. Flowers 1-2 cm. long, in axillary and terminal spiked whorls --46.