Hyssopus 



Labiatae 



819 



Jan. 



Feb. 



Mar. 



Apr. 



May 



June 



July 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



Miles 



50 



Map 1775 



Satureja qlabra (Null) Fern. 



50 



Map 1777 



Pycnanthemum flexuosum (Walt.) BSP. 



7313. HYSSOPUS [Tourn.] L. Hyssop 

 See excluded species no. 540, p. 1086. 



7317. PYCNANTHEMUM Michx. Mountain-mint 



Leaves ovate to ovate-lanceolate, the upper floral ones whitened beneath and mostly 

 1-2 cm wide; fruiting cymose clusters generally loose and 1-2 cm wide or up to 

 4 cm wide. 



Lower pair of calyx teeth 1.5-2.5 mm long, upper pair a third to half as long 



1. P. pycnanthemoides. 



Lower pair of calyx teeth 1-1.5 mm long, upper pair a half to two thirds as long. 



(See excluded species no. 542, p. 1086) P. incanum. 



Leaves linear to lanceolate, the floral ones not whitened and less than 1 cm wide; 

 fruiting heads less than 1 cm wide; calyx teeth nearly glabrous to densely pubescent 

 but never with long hairs (1-2 mm long). 

 Stems, upper branches, and leaves glabrous, rarely the upper part of the stem and 

 branches minutely puberulent or scabrous, sometimes the margins of the leaves 

 scabrous; blades mostly 1-3.5 mm wide; calyx teeth triangular-lanceolate, long- 

 acuminate, nearly glabrous to puberulent or pubescent, not long and densely 



pubescent to the apex; corolla about as long as the calyx tube 2. P. flexuosum. 



Stems, upper branches, and leaves pubescent, generally densely so, and very rarely 

 the pubescence scant; bracts and calyx teeth generally woolly- or matted- 

 pubescent. 

 Stems pubescent on the angles only; upper leaves canescent or densely puberulent 

 above; median leaves generally densely pubescent beneath, the blades mostly 

 5-15 mm wide; calyx teeth generally triangular-lanceolate, acuminate, generally 



densely pubescent to the apex 3. P. jrilosum. 



Stems pilose with spreading hairs; upper leaves green and glabrous or nearly so 

 above; median leaves more or less pubescent on the principal veins beneath, 

 rarely nearly glabrous, the blades mostly 2-10 mm wide; calyx teeth generally 

 short, triangular-ovate or somewhat narrower, not usually densely pubescent 

 to the apex A. P. virginianum. 



1. Pycnanthemum pycnanthemoides (Leavenw.) Fern. (Koellia pyc- 

 nanthemoides (Leavenw.) Kuntze.) Map 1776. In dry soil in open woods 

 and fallow fields and along roadsides. This is a very conspicuous plant, 

 usually about a meter high. It is restricted to the southern part of the 

 state and has been reported as Pycnanthemum incanum. 



