Coefficient of Conservatism:
Coefficient of Wetness:
SHRUBBY ST. JOHN'S-WORT
B. S. Walters
Swamp borders, thickets, meadows, fields, roadsides, sandy open forests (oak); in drier sites generally than Hypericum kalmianum, often in successional shrubby fields.
Flowers need to be examined carefully for the style (and capel) number. Especially in younger flowers, 2 or more of the 5 styles in Hypericum kalmianum may have not yet separated.
The North Manitou Island collection (F. Wislizenus 467 in 1886, MO) is somewhat of an uncertain record; it includes a fragment of H. perforatum (the original identification) and could represent an inadvertent mixture from some other locality.