142 



LABIATAE. 



VOL. III. 



i. Koellia virginiana (L.) MacM. Virginia Mountain-Mint. Fig. 3660. 



Satureja virginiana L. Sp. PI. 567. 1753. 



P. lanceolatum Pursh, Fl. Am. Sept. 409. 1814. 



Koellia virginiana MacM. Met. Minn. 452. 1892. 



Stem strict, rather stout, glabrous or pubescent, 

 i-3 high. Leaves lanceolate or linear-lanceo- 

 late, fragrant, very short-petioled or sessile, firm, 

 entire, acuminate at the apex, glabrous or some- 

 what puberulent beneath, or the uppermost densely 

 canescent, i'-2 r long, 2"-$" wide, often with short 

 leafy branches in their axils; glomerules dense, 

 4"-6" in diameter, terminal, corymbed, canescent; 

 bracts appressed, rigid, acute, acuminate or subu- 

 late-tipped, not exceeding the clusters; calyx 

 cylindraceous, or expanded above, canescent, its 

 teeth triangular-ovate, equal or nearly so, acute, 

 little longer than wide, about one-fourth as long 

 as the tube ; corolla pubescent without, purple- 

 spotted, its tube longer than the calyx. 



In dry fields and thickets, Quebec and Ontario to 

 Minnesota, south to Georgia, Alabama and Kansas. 

 Virginia or mountain thyme. Prairie-hyssop. Penny- 

 royal. Basil. July-Sept. 



2. Koellia flexuosa (Walt.) MacM. Narrow-leaved Mountain-Mint. Fig. 3661. 



Satureja Thyinus virginicus L. Mant. 2: 409. 1771. Not 



5". Virginia a L. 1753. 



Origanum flexuosum Walt. Fl. Car. 165. 1788. 

 Koellia capiiata Moench, Meth. 408. 1794. 

 Pycnanthemum linifolium Pursh, Fl. Am. Sept. 409. 1814. 

 P. flexuosum B.S.P. Prel. Cat. U. S. 42. 1888. 

 Koellia flexuosa MacM. Met. Minn. 452. 1892. 



Stem slender, stiff, nearly glabrous throughout, \\-2\ 

 high. Leaves linear or linear-lanceolate, entire, glabrous 

 or the uppermost puberulent, sessile, or the lower very 

 short-petioled, i'-2' long, i"-ii" wide, rather firm, often 

 with short leafy branches in their axils; glomerules dense, 

 terminal, corymbed, 3" -5" broad, canescent; bracts ap- 

 pressed, acuminate, or subulate-tipped, not longer than 

 the clusters ; calyx cylindraceous, canescent, its teeth subu- 

 late and rigid, equal or nearly so, 3-4 times longer than 

 broad, about one-third as long as the tube; corolla-tube 

 longer than the calyx. 



In fields and thickets, Maine to Florida, New York, Minne- 

 sota, Kansas and Texas. Little fragrant. July-Sept. 



3. Koellia pilosa (Nutt.) Britton. Hairy 

 Mountain-Mint. Fig. 3662. 



Pycnanthemum pilosum Nutt. Gen. 2: 33. 1818. 

 Pycnanthemum mulicum var. pilosum A. Gray, Syn. Fl. 



2: Part i, 355. 1878. 

 Koellia pilosa Britton, Mem. Torr. Club 5: 279. 1894. 



Pubescent, at least above, i-2* high. Leaves 

 lanceolate, very short-petioled or sessile, entire or 

 very sparingly denticulate, i'-2' long, 3"-6" wide, 

 firm, acuminate at the apex, mostly narrowed at the 

 base, commonly with smaller ones, or short leafy 

 shoots in their axils ; glomerules dense, numerous, 

 terminal, villous or hirsute-canescent, about 4" in 

 diameter; bracts lanceolate, acuminate, equalling or 

 exceeding the clusters ; calyx cylindraceous, narrow, 

 canescent, its teeth lanceolate-subulate, equal, often 

 ciliate, about 3 times as long as wide and one-fourth 

 the length of the tube; corolla pubescent, its tube 

 little longer than the calyx; stamens exserted. 



On prairies and in dry woods, Ontario to Pennsyl- 

 vania, Georgia, Iowa, Kansas and Arkansas. July-Sept. 



Koellia leptodon (A. Gray) Small, of the North Carolina mountains, with bristly-ciliate calyx- 

 teeth, is recorded as extending to Ohio and Missouri. 



