1	"Corolla tube > 15 mm"	"Stachys chamissonis"
1	"Corolla tube < 15 mm"	2
2	"Internal ring of hairs perpendicular to corolla tube; corolla not pouched toward base on lower side"	"Stachys bullata"
2	"Internal ring of hairs oblique to corolla tube; corolla pouched toward base on lower side"	3
3	"Hairs densely silky-silvery, woolly; Del Norte Co."	"Stachys bergii"
3	"Hairs soft, stiff, or glandular, never silky-silvery; widespread"	4
4	"Upper corolla lip < 2 mm; stamens +- exserted from corolla tube"	"Stachys stricta"
4	"Upper corolla lip > 2 mm; stamens clearly exserted from corolla tube"	5
5	"Calyx lobes lanceolate, +- = tube; proximal leaves short-petioled to sessile; MP"	"Stachys pilosa"
5	"Calyx lobes generally deltoid or triangular, shorter than tube; proximal leaves generally long-petioled; widespread"	6
6	"Plant with abundant cobwebby, tangled hairs, herbage generally felty"	"Stachys albens"
6	"Plant lacking cobwebby, tangled hairs, herbage not felty"	7
7	"Mature inflorescence compact, generally only 2 lowest bracts visible"	"Stachys pycnantha"
7	"Mature inflorescence elongated, many bracts visible"	8
8	"Leaf blade narrowed, silky hairy, base wedge-shaped; corolla white (+- pink)"	"Stachys ajugoides"
8	"Leaf blade broader, never silky, base rounded, truncate, or cordate; corolla pink or darker (white)"	9
9	"Stem, herbage densely glandular, resinous; lower corolla lip 6--10 mm wide"	"Stachys stebbinsii"
9	"Stem, herbage +- glandular, not resinous; lower corolla lip 4--6 mm wide"	10
10	"Corolla magenta to purple; bracts gradually reduced distally on stem; NW, ScV, SnFrB"	"Stachys mexicana"
10	"Corolla pink, bracts rapidly reduced distally on stem; widespread"	11
11	"Plant generally < 1 m; leaf base cordate, blade ovate"	"Stachys rigida var. quercetorum"
11	"Plant generally 1 m; leaf base rounded (cordate), blade lanceolate to oblong"	"Stachys rigida var. rigida"