274 .LABI AT J5. 



upper lip entire ; lower 3-lobed ; tube dilated. Stamens 2. 

 Style bifid at the summit. 



B. hirsute/, JBenth. : plant hairy ; leaves on long petioles, ovate, rounded 

 and somewhat cordate at base, hairy on both sides ; lower teeth of the 

 calyx short, without awns. Monarda hirsuta Pursh. 



Low woods. Mass, and N. Y. to Car. W. to Miss. June, July. %.Stem 

 2 3 feet high, branched. leaves usually with a tuft of down near the midrib 

 beneath. Whorls 2 4, on the upper part of each branch. Corolla small, pale 

 blue, dotted with purple. Hairy Blephilia. 



III. SATUREINE^J. Corolla somewhat '2-Hpped ; the lips fiat. Sta- 

 mens 4, (sometimes 2.) straight, diverging; the lower pair longer. 

 Anthers not dimidiate. 



7. PYCNANTHEMUM. Mick. Mountain Mint. 



(From the Greek nvxvos, dense, and avQspov, a flower ; in allusion to the in- 

 florescence.) 



Heads of flowers surrounded by an involucre of many bracts. 

 Calyx ovoid or tubular, about 13-nerved, 5-toothed, more or 

 less 2-lipped. Corolla somewhat 2 -lipped ; upper lip nearly 

 entire ; lower trifid, the lobes ovate and obtuse. Stamens 4, 

 nearly equal, distant. Anthers with the cells parallel. 



1. P. incanum Mick.: leaves oblong-ovate, petiolate, acute, remotely 

 serrate, tomentose-pubescent beneath ; the upper ones hoary on both sides ; 

 heads compound, pedunculate, cymose ; bracts linear-subulate. Clinopo- 

 dium incanum Linn. 



Low fields. Can. to Car. and Alabama. July Sept. Ij.. Stem 2 3 feet 

 high, branching above, 4-angled, pubescent. Flowers pale-red, in dense lateral 

 and terminal cymes. Nearly the whole plant is covered with a white soft 

 down. Hoary Pycnanlhemum. 



2. P. dinopodioides Torr. fy Gr.: leaves oblong-lanceolate, on short 

 petioles, acute at each end, slightly serrate, smooth above, villous-pubes- 

 cent beneath ; heads cymose, contracted ; teeth of the calyx short, subulate. 



Dry rocky hills Kings-bridge on the Island of New York. Torr. Aug., 

 Sept. '2J-. Stem H 2 ieet high, sparingly branched. Leaves pale-green, but 

 never hoary, (the floral ones slightly.) Heads more than half an inch in diam- 

 eter. Distinguished from the preceding principally by the want of hoariness in 

 the foliage, and the small size of the heads. (Torr.) 



Basil-leaved Pycnanthemum. 



3. P. aristatum Mich. : leaves lanceolate-ovate, subserrate, on very short 

 petioles, nearly smooth on both sides ; heads dense, sessile ; bracts acumi- 

 nate, subulate ; corolla pubescent within. Ncpeta Virginica Linn. 



Woods. Md. to Car. W. to Tenn. July, Aug. '21. Stem 1 2 feet 

 high. Upper leaves hoary. Flowers very small, white, in one or two sessile 

 whorls and a terminal head. Bracts and calyx terminated by long awns. 



Spear-leaved Pycnanthemum. 



4. P. Torrei Benth. : stem strict, pubescent ; leaves varying from linear- 

 lanceolate to oblong-linear, smoothish. acute, remotely toothed, tapering 



