In low places in low, flat woods and in swamps. Rare. The lower surface of the leaves of my specimens are very glaucous and not glandular or only sparingly so near the margins. The axillary flowers in the species are mostly in 1's and 2's while those of the variety are mostly in 3's. The sepals of the species are about 3 mm long while those of the variety are about 5 mm long.
Erect, rhizomatous perennial to 1 m, simple or branched above; lvs translucent-dotted, lance-elliptic to oblong or lance-oblong, 5-12 נ1-3 cm, dark-punctate beneath, obtuse or rounded above, narrowed below to a petiole 3-15 mm; cymes terminal and from the upper axils, on peduncles 1-4 mm; pet 5-7 mm; fr 7-12 mm; styles 1 mm. Swamps and marshes on the coastal plain; Md. to Fla. and Tex., n. in the interior to s. Ind. and s. Mo. July-Sept. (Hypericum w.; H. petiolatum Walter, not L.)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.