LAB I A TAE. 8OI 



Bracts spreading: clusters loose; calyx-teeth subulate. 



Calyx-teeth about one-half as long as the tube. 8. K. incana. 



Calyx- teeth as long as the tube. 9. K. pycnanthemoides. 



Calyx-teeth triangular, triangular-lanceolate or lanceolate. 



Bracts spreading; clusters loose; calyx-teeth short. 10. K. albescens. 



Bracts appressed; clusters dense. 



Bracts canescent; leaves firm, acute. u. K. mutica. 



Bracts ciliate or villous; leaves membranous, acuminate. 



12. K. montana. 



1. Koellia flexuosa (Walt.) MacM. NARROW-LEAVED MOUNTAIN-MINT. 

 (I. F. f. 3154.) Stem stiff, nearly glabrous, 4-8 dm. high. Leaves entire, glab- 

 rous or the uppermost puberulent, sessile, or the lower very short-petioled, 2-5 cm. 

 long, 1-3 mm. wide, often with short leafy branches in their axils; glomerules 

 cymose, 6 10 mm. broad, canescent; bracts appressed, acuminate, or subulate- 

 tipped, not longer than the clusters; calyx cylindraceous, canescent, its teeth sub- 

 ulate and rigid, equal or nearly so, 3-4 times longer than broad, about one-third 

 as long as the tube. In fields and thickets, Me. and N. H. to Fla., Ont., Kans., 

 Minn, and Tex. Little fragrant. July-Sept. 



2. Koellia Virginiana (L.) MacM. VIRGINIA MOUNTAIN-MINT. (I. F. f. 

 3155.) Stem strict, glabrous or pubescent, 3-9 dm. high. Leaves lanceolate or 

 linear-lanceolate, fragrant, short-petioled or sessile, firm, entire, acuminate, gla- 

 brous, or puberulent beneath, or the uppermost canescent, 2-5 cm. long, 4-10 mm. 

 wide, often with short leafy branches in their axils; glomerules dense, 8-12 mm. 

 in diameter, cymose, canescent; bracts appressed, rigid, acute, acuminate or sub- 

 ulate-tipped, not exceeding the clusters ; calyx canescent, its teeth equal or nearly 

 so, acute, little longer than wide ; corolla pubescent, purple-spotted. In dry fields 

 and thickets, Quebec and Ont. to Minn., Ga., Ala. and Kans. July-Sept. 



3. Koellia pilosa (Nutt.) Britton. HAIRY MOUNTAIN-MINT. (I. F. f. 3156.) 

 Pubescent, 3-8 dm. high. Leaves lanceolate, short-petioled or sessile, entire or 

 sparingly denticulate, 2-5 cm. long, 6-12 mm. wide, firm, acuminate, commonly 

 with short leafy shoots in their axils; glomerules cymose, villous or hirsute-canes- 

 cent, about 8 mm. in diameter; bracts lanceolate, acuminate, equalling or exceed- 

 ing the clusters; calyx narrow, canescent, its teeth equal, about 3 times as long as 

 wide and one-fourth to one-third the length of the tube; corolla pubescent. On 

 prairies and in dry woods, Ohio to Ga., Kans. and Ark. July-Sept. 



4. Koellia verticillata (Michx.) Kuntze. TORREY'S MOUNTAIN-MINT. (I. F. 

 f. 3157.) Stem slender, 3-8 dm. high. Leaves linear-lanceolate to ovate-lanceo- 

 late, short-petioled or sessile, serrulate or entire, acute or acuminate, 2-8 cm. long, 

 6-20 mm. wide, the uppermost sometimes canescent; clusters dense, canescent, 

 10-12 mm. broad, cymose and commonly also in the upper axils; bracts appressed, 

 lanceolate, acuminate, equalling or longer than the clusters; calyx canescent, its 

 teeth subulate or lance-subulate, 2-3 times as long as wide, one-fourth to one-third 

 as long as the tube; corolla pubescent. In dry fields and thickets, Vt. to R. L, 

 N. Y., Va., Pa. and Mo. The narrower-leaved forms are Koellia Torreyi 

 (Benth.) Kuntze, and are possibly distinct. July-Sept. 



5. Koellia clinopodioides (T. & G.) Kuntze. BASIL MOUNTAIN-MINT. 

 (I. F. f. 3158.) Pubescent or puberulent; stem 3-8 dm. high. Leaves rather thin, 

 short-petioled, sharply serrate, or the upper entire, 3-8 cm. long, 1-2.5 cm - wide; 

 flower-clusters terminal and axillary; bracts linear-acuminate or subulate-tipped, 

 not exceeding the clusters ; calyx canescent or glabrate, its teeth subulate, some- 

 times with a few long hairs, about one-fourth the length of the tube. In dry soil, 

 N. Y. and Penn. to Tenn. Aug.-Sept. 



6. Koellia hyssopioflia (Benth.) Britton. HYSSOP MOUNTAIN-MINT. 

 (I. F. f. 3159.) Puberulent or glabrate; stem slender, stiff, 3-9 dm. high. Leaves 

 linear-oblong to lanceolate-oblong, short-petioled, or the upper sessile, narrowed at 

 the base, entire or denticulate, 1-4 cm. long, 4-12 mm. wide, glabrous or minutely 

 canescent; flower-clusters dense, minutely canescent, cymose, and usually also in 

 the upper axils; bracts linear -oblong, terminated by an awn almost as long as the 

 body; calyx glabrous or nearly so, nerved, its teeth bristle-pointed, nearly as long 

 as the tube. In dry soil. Va. to Fla. June-Aug. 



7. Koellia aristata (Michx.) Kuntze. AWNED MOUNTAIN-MINT. (I. F. f. 

 3160.) Similar to the preceding; stem stiff, minutely canescent, 3-8 dm. high. 



