402 COXTRIBUTIONS FROM THE jJ^ATIOISTAL, HERBARIUM. 



Plants conspicuously hairy; calyx lobes nearly alike in size; corolla white or 

 pink, much longer than the calyx. 

 Plants pale with a covering of soft whitish matted hairs; leaves with rounded 



teeth; calyx 15-ribbed 6. NEPETA. 



Plants green, covered with spreading hairs; leaves with sharp teeth; calyx 

 5 to lO-ribbed 7. STACHYS. 



1. LYCOPTJS L. Water horehound. 



Perennials, odorless, glabrous or nearly so; leaves toothed or lobed; flowers small, 

 whitish, scarcely longer than the calyx, clustered in the axils of the leaves. 

 Calyx teeth mostly obtuse, shorter than the nutlets; leaves toothed. 



1. L. uniflorus. 

 Calyx teeth very acute, longer than the nutlets; leaves lobed, at least near the base. 



2. L. americanus. 



1. Lycopus uniflorus Michx. Frequent at low altitudes on the west slope, in 

 sphagnum bogs or swampy thickets. B. C. to Oreg., Va., and Newf. {L. communis 

 Bickn.) — Plants slender, with long slender runners; rootstocks thickened and tuber- 

 like; leaves sharply toothed, 2.5 to 6 cm. long; corolla 2 to 3 mm. long. 



2. Lycopus americanus Muhl. Swamp at Belton, Umbach. B. C. to Calif., Fla., 

 and Newf. — Stems mostly simple, 20 to 40 cm. high, often purplish below; leaves 3 



to 8 cm, long, petioled. 



2. MENTHA L. 



1. Mentha canadensis L. American mint. Common at low altitudes, in low 

 meadows or swamps or along streams. Widely distributed in N. Amer. — Plants erect 

 or nearly prostrate, with a strong odor; leaves 2 to 5 cm. long, sharply toothed; 

 flowers small, pink. 



The species is a variable one, some of whose forms are often considered to be dis- 

 tinct species. The Blackfoot Indians used the leaves for making a tea and for flavoring 



dried meat. 



3. MONARDA L. 



1. Monarda menthaefolia Benth. Horsemint. Frequent at low altitudes, on 

 dry open rocky slopes or in thin woods. Idaho to Utah, Tex., and 111. — Plants 30 

 to SO cm. high, finely and closely hairy; leaves ovate, short-stalked, toothed; flowers 

 rose-colored, in large dense heads. 



A showy plant, with a strong and distinctive odor. 



4. PRUNELLA L. 



1. Prunella vulgaris L. Heal-all. Common at low and middle altitudes, usually 

 in woods or in wet thickets, along streams, etc.; sometimes in sphagnum bogs. 

 Widely distributed in N. Amer., Eur., and Asia. — Plants 10 to 40 cm. high, usually in 

 small clumps, nearly glabrous; leaves ovate or oblong, 3 to 8 cm. long, stalked, entire 

 or with low rounded teeth. 



A handsome plant when in full flower. Known also as self-heal or carpenter-weed. 



5. MOLDAVICA Adans. 



1. Moldavica parviflora (Nutt.) Britton. Dragonhead. At low and middle 

 altitudes, usually along trails or in waste places; rather scarce and perhaps intro- 

 duced. Alaska to Ariz, and N. Y. — Annual or biennial, 30 to 60 cm. high; leaves 

 lanceolate or oblong, coarsely toothed, the teeth often with spinelike tips. 



An inconspicuous weedy plant. 



