Hypericum hypericoides subsp. hypericoides
Plants erect, usually unbranched from base and freely branched well above ground level, 3–15 dm. Leaf blades usually narrowly elliptic to narrowly oblong, 7–25 × 1–8.5 mm, broadest near middle. Inflorescences: branching dichasial/lateral to pseudodichotomous. 2n = 18.
Phenology: Flowering summer–fall (Jun–Oct).
Habitat: Dry, open, sandy woods to moist, shady, rich woods and thickets
Elevation: 0–1000 m
Ala., Ark., Del., Fla., Ga., Ill., Ky., La., Md., Miss., Mo., N.J., N.C., Okla., S.C., Tenn., Tex., Va., W.Va.
Subspecies hypericoides is probably extirpated in Illinois.