Stachys 



Labiatae 



811 



50 



Map 1754 



Stachys hyssopifolia Michx 



Stachys aspera Michx 



Calyx essentially glabrous, sometimes bearing a few bristles, especially toward 

 the base; leaves entire or serrulate, essentially glabrous. 



Leaves rarely more than 6 mm wide, mostly entire 1. S. hyssopifolia. 



Leaves mostly 8-12 mm wide, usually serrulate 2. S. aspera. 



Calyx definitely hispid; leaves hispid, rarely glabrate, mostly 1.5-4 cm wide 



3. S. hispida. 



Leaves definitely pubescent, even velvety. 



Leaves tending to be elliptical and narrowed below the middle, mostly 2-4 cm 



wide, sometimes wider 4. S. palustris var. homotricha. 



Leaves tending to be oblong, particularly below the middle, usually less than 2.5 



cm wide. (See excluded species, no. 532, p. 1085) S. palustris. 



Lower leaves on petioles usually 1-2 cm long, the median ones on petioles 1-7 cm 

 long, the uppermost rarely sessile. 

 Plants essentially glabrous, sometimes thinly hispid on the margins of the stems. 



5. S. tenuifolia. 



Plants definitely pubescent. 



Stems clothed with both long and short hairs; leaves prevailingly ovate or obovate; 



calyx teeth deltoid and shorter than the tube 6. S. Riddellii. 



Stems clothed on the angles with stiffish hairs, otherwise glabrous; leaves pre- 

 vailingly oblong or tending to be oblong rather than ovate; calyx teeth in 

 shape similar to those of the preceding species 7. S. Clingmanii. 



1. Stachys hyssopifolia Michx. Map 1754. A local plant in the north- 

 western counties, usually common where it is found. It is usually found 

 in moist, open, sandy places about lakes, and was found once along a sandy 

 roadside. Its habitat is doubtless minimacid because the plants most often 

 associated with it are Rhexia virginica, Aletris, Hypericum gentianoides, 

 Poly gala cruciata, Gaultheria, and Vaccinium migustifolium. 



Mass. to Mich., southw. to Fla. 



2. Stachys aspera Michx. (Stachys hyssopifolia var. ambigua Gray 

 and Stachys ambigua Britt., not Smith.) Map 1755. Our only specimen 

 is from railroad ballast about a quarter of a mile east of Dana in Ver- 

 million County. Common here in one place but not noted again between 

 Dana and Hillsdale, a distance of 6 miles. 



Mass. to Wis., southw. to Ga. and Ky. 



