Monographs Details: Hypericum prolificum L.
Authority: Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Description:Species Description - Diffusely branched shrub to 2 m, the twigs sharply 2-edged; lvs articulate at the base, linear to oblong or narrowly elliptic, 3–6 cm × 4–15 mm, usually abruptly narrowed to a short petiole; infl a small terminal cyme of mostly 3–7 fls, often with additional cymules from the upper axils; pet 7–10 mm; styles 3(4), connate at the base and forming a beak on the fr; fr mostly 7–14 mm, quasi- 3(4)- locular, the partitions meeting in the center but not joined; 2n=18. Many habitats, from swamp-margins to cliffs and woods; N.Y. to s. Mich. and Minn., s. to Ga. and La. July–Sept. (H. spathulatum)