820 



Labiatae 



Pycnanthemum 



50 



Map 1778 



Pycnanthemum pilosum Nutl 



50 



Map 1779 

 Pycnanthemum virginianum 

 (L.) Dur'and & Jackson 



I was informed by a pioneer of Perry County that he was cured of 

 incontinence of urine by a tea made of this plant. 

 Va. to Ind., southw. to Ga. and Tenn. 



2. Pycnanthemum flexuosum (Walt.) BSP. (Koellia flexuosa (Walt.) 

 MacM.) Slender Mountain-mint. Map 1777. This species has a wide 

 range of habitats. It is generally found in dry soil on the crests and slopes 

 of black and white oak ridges, in dry fallow fields, and in dry soil along 

 roadsides and railroads. It is also found in moister situations but usually 

 in sandy or hard, sandy, clay soil along roadsides and in prairie habitats. 



This species is likely to be confused with Pycanthemum virginianum, 

 from which it may be distinguished easily by being glabrous or nearly so, 

 and by having long, glabrous calyx teeth. Pycnanthemum virginianum is 

 generally pubescent, and its calyx teeth are merely acute and generally 

 long white-pubescent to the tip. 



Cent. Maine to Minn., southw. to Fla. and Tex. 



3. Pycnanthemum pilosum Nutt. {Koellia pilosa (Nutt.) Britton of 

 Britton and Brown, Illus. Flora, ed. 2.) Hairy Mountain-mint. Map 

 1778. Generally in dry sandy soil, along roadsides, in open woods, and 

 rarely in moist places. 



This species is a great favorite of the honey bee. 

 Pa., Ont., and Iowa, southw. to Ga., Ark., and Kans. 



4. Pycnanthemum virginianum (L.) Durand & Jackson. (Koellia vir- 

 giniana (L.) MacM. of Britton and Brown, Illus. Flora, ed. 2.) VlR- 

 giana Mountain-mint. Map 1779. This species is generally found in low 

 ground about lakes and ponds, in marshes, low open woods, roadside 

 ditches, and frequently in moist, sandy prairie habitats. 



Cent. Maine to N. Dak., southw. to Ga., Ala., and Kans. 



7319. THYMUS' [Town.] L. Thyme 

 See excluded species no. 544, p. 1086. 



