This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol3", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Scutellaria galericulata L. Sp. Pl. 599. 1753.
Perennial by filiform stolons, not tuber-bearing, puberulent or pubescent; stem erect, usually branched, 1°-3° high. Leaves oblong-lanceolate to ovate-oblong, thin, short-petioled, or the upper sessile, acute at the apex, dentate with low teeth or the upper entire, subcordate or rounded at the base, 1 -2 1/2' long, the uppermost usually much smaller and bract-like; flowers solitary in the axils; peduncles shorter than the calyx; corolla blue, puberulent, nearly or quite 1' long, with a slender tube and slightly enlarged throat; gynobase short.
In swamps and along streams, Newfoundland to Mackenzie, Alaska, New Jersey, the mountains of North Carolina, Ohio, Nebraska, Arizona and Washington Also in Europe and Asia. June-Sept.
Scutellaria Churchilliana Fernald, of Maine and New Brunswick, has smaller flowers, solitary in the axiis, its leaves much like those of S. lateriflora, and is, perhaps, a hybrid.
Perennial by filiform stolons; stem glabrous or sparingly pubescent, erect, slender, simple or sometimes branched, 6'-2° high. Leaves thin, glabrous, or sometimes decidedly pubescent, the lower slender-petioled, nearly orbicular, crenate, often subcordate at the base, the middle ones larger, ovate, l'-2' long, sessile or nearly so, obtuse or acute, coarsely dentate or crenate, the upper lanceolate or ovate-lanceolate, acute, commonly entire; flowers solitary in the axils; fruiting calyx about 2" long; corolla blue, 4"-5" long, puberulent, the lower lip longer than the concave upper one; nutlets membranous-winged, borne on a slender gyno-base.
In moist woods and thickets, southern Ontario, New York and New Jersey to Illinois and Missouri, North Carolina and Tennessee. Ascends to 3000 ft. in Virginia. May-Aug.