LABIATAE QMINT FAMILY) 695 



entire ; laceme simple, loose. — Moist shaded banks, Del. to O., s. in the mts. to 

 Va. and Tenn. June, July. 



-.H. 4H. Stem-leaves if slender-petiole d not cordate (or only the very lowest some- 

 times so) ; lateral lobes of the usually violet-blue corolla shorter than the 

 galeate upper lip. 



= Stem-leaves crenate-dentate or serrate, 

 a. Stem-leaves on distinct petioles (8 mm. or more long^. 



1. Flowers in terminal single or panicled racemes ; the floral leaves gradually 



reduced to entire inconspicuous bracts. 



4. S. serrata Andr. Green and nearly glabrous; stem rather simple, 2.5-7 

 dm. high, with single loosely flowered racemes ; leaves serrate^ acuminate at 

 both ends, ovate or ovate-oblong; calyx, etc., somewhat hairy ; corolla 2-2. .5 cm. 

 long, slender, its lips equal in length. — Woods, N. Y. and Pa. to 111. and N. C. 

 May, June. 



5. S. can6scens Nutt. Stem branched above, 0.5-1.2 m. high, with the 

 panicled mamj-flowered racemes, flowers, and the lower surface of the ovate or 

 lance-ovate acute (at the base acute, obtuse, or cordate) crenate leaves whitish 

 with fine soft down, often becoming rather glabrous ; bracts oblong or lanceo- 

 late ; corolla 2 cm. long. (S. incana Muhl. ? , nomen sMfewMawm.) — Woods 

 and river-banks, Pa. to s. Ont., Mich., and south w. July-Aug. 



6. S. pil5sa Michx. Pubescent icith spreading hairs; stem nearly simple, 

 2-7 dm. high ; leaves rather distant, crenate, oblong-ovate, obtuse, varying to 

 roundish-ovate, 2-5 cm. long, the lower abrupt or heart-shaped at base and long- 

 petioled, the upper on short margined petioles, veiny ; bracts oblong-spatulate ; 

 racemes short, often branched ; corolla 1.2-1.7 cm. long, rather slender, the 

 lower lip a little shorter. — Dry or sterile ground, s. N. Y. to Mich., s. to Fla. 

 and Tex. May, June. 



Var. hirs^ta (Short) Gray. A large form (8-9 dm. high), more hirsute, 

 with larger very coarsely crenate leaves. — Richer soil, Ky. and Va. 



2. Flowers mostly home on elongate branches even from the base of the plant, 



solitary in the axils of mostly dentate leaves. 



7. S. Churchilliana Fernald. Stems ascending from a slender rootstock, 

 3.5-6 dm. high, minutely pilose, freely branching; the branches simple or 

 forked, flexuous, mostly 1.5-3 dm. long; leaves ovate-acuminate, thin, glabrous 

 above, minutely pilose on the nerves beneath, those of the primary stem 4-6 

 cm. long, crenate-dentate, those of the branchlets smaller (1.5-3.5 cm. long); 

 corolla 1-1.6 cm. long, slender-funnel-form, gradually enlarged upward. — 

 Alluvial soil, N. B. and Me, July-Sept. c- 



6. Stem-leaves subsessile or on short petioles (1-4 mm. long). 



8. S. galericulata L. Herbaceous ; subterranean stolons not tuberiferous ; 

 smooth or a little downy, erect, 1-9 dm. high ; leaves ovate-lanceolate or oblong, 

 acute, serrate, roundish and slightly heart-shaped at base, 1.5-6 cm. long; 

 flowers solitary in the axils of the upper leaves; corolla violet-blue, 1.7-2.2 

 cm. long, with slender tube, the large lower lip nearly erect. — Wet places, Nfd. 

 to B. C, s. to N. C, O., and Neb. June- Aug. 



= = Stem-leaves (or all but the lowest) entire. 



9. S. integrifblia L. Downy all over with a minute hoariness ; stems soli- 

 tary and commonly simple, 3-8 dm. high, from a slender base ; upper leaves 

 oblong-lanceolate, mostly entire, obtuse, very short-petioled, the lowest long- 

 petioled, ovate, dentate ; flowers in the axils of the upper more or less reduced 

 leaves or in terminal single or panicled racemes ; corolla 2-2.5 cm. long, much 

 enlarged above, the ample lips subeqtial in length. — Moist ground, e. Mass. to 

 Fla. and Tex., chiefly near the coast. May-July. 



10. S. Biishii Britton. Stems numerous, from a short ligneous candex, 

 1.5-3 dm. high, closely puberulent ; leaves uniform, oblanceolate, obtuse, all 

 entire; flowers axillary, along the upper two thirds of the stem; corolla 2-2.5 

 Dm. long. — Barrens, s. Mo. May, June. 



