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..
S. parvula Michx. Fl. Bor. Am. 2: 11. 1803.
Scutellaria ambigua Nutt. Gen. 2: 37. 1818.
S.. parvula var. mollis A. Gray, Syn. Fl. 21: 38o.
Glabrous, or quite densely pubescent, sometimes slightly glandular, perennial by slender tuberous-thickened rootstocks; stems erect or ascending, very slender, usually branched, 3'-12' tall. Leaves ovate, oval or lanceolate, or the lower nearly orbicular, entire and sessile, or the lower dentate and petioled, 3"-12" long; flowers solitary in the axils; fruiting calyx about 2" long; corolla 2 "-4" long, violet, pubescent; gynobase short.
In sandy soil, Quebec to Ontario, South Dakota, Florida, Nebraska and Texas. Races differ in pubescence and in leaf-form. April-July. Little scull-cap.
Scutellaria resinosa A. Gray, Syn. Fl. 2: Part 1, 381. 1878. Not Torr. 1827.
Scutellaria Brittonii Pcrter, Bull. Torr. Club 21: 177. 1894.
Perennial by tuberous-thickened rootstocks, vis-cidly glandular, pubescent or puberulent, branched from the base; stems erect, 4'-8' high, leafy. Leaves oblong or oval, sessile and entire or the lowest short-petioled and slightly crenulate, obtuse at the apex, rather prominently veined on the lower surface, 6"-i2" long, the upper scarcely smaller; flowers solitary in the axils; pedicels mostly shorter than the calyx; corolla pubescent, blue, 10"-15" long, the tube narrow below, enlarged above into the throat; gynobase short.
Nebraska (according to Coulter); Colorado and Wyoming. June-July.
Scutellaria Bushii Britton, Manual, 785. 1901.
Roots thick-fibrous; stems several or numerous, tufted, erect or nearly so, finely cinereous-pubescent, 6'-12' high. Leaves oblanceolate to oblong-oblanceo-late, obtuse, entire, sessile, 3/4'-1 1/2' long, 2"-4" wide, the veins rather prominent; flowers solitary in the axils, short-peduncled, about 1' long; corolla short-pubescent.
Barrens, southern Missouri. May-June.
S.. saxatilis Riddell, Suppl. Cat. Pl. Ohio, 14. 1836.
Perennial by filiform runners or stolons, glabrate or sparingly puberulent; stem slender, weak, ascending or reclining, simple or branched, 6'-2o' long. Leaves ovate, slender-petioled, thin, coarsely crenate, obtuse at the apex, cordate at the base, 1'-2' long, or the lower nearly orbicular, and the upper lanceolate, subacute and entire; flowers solitary in the upper axils, or clustered in a terminal leafy-bracted loose raceme; bracts longer than the pedicels; fruiting calyx about 2" long; corolla light blue, very nearly glabrous, 8"-10" long; gynobase short.
On moist banks and in thickets, Delaware to South Carolina, Ohio and Tennessee. Ascends to 3000 ft. in Virginia. May-July.