United States, Massachusetts, Middlesex, Winchester, MA
42.452318 -71.136998 +-4321m. WGS84
Dry rocky mixed woods
flower
In Bull. N.Y. State Mus. Ccxliii-ccxliv. 61 (1923). Syn. V. pensilvanicum Lam. Dict. I. 74 (1783); Hooker in Bot. Mag. Lxii. T. 3434 (1835); DC. Prod. Vii. 572 (1839); Gray, Man. 261 (1848) et Syn. Fl. Ii. Pt. 1, 22 (1878); Macoun, Cat. Canad. Pl. etc.