Hypericaceae - St. John’s-wort family
Species that grow without cultivation on Mount Desert Island

compiled by the
Champlain Project - P. O. Box 55 - Bass Harbor, Maine  04653
info@vfthomas.com

(updated 11 September 2018)


Hypericaceae - St. John’s-wort family

Mount Desert Island is home to 10 species and 1 hybrid in 2 genera. Click on a link below or scroll down for more information.
   Hypericum (8 species)
      Hypericum boreale - northern St. John’s-wort (occasional [see note 1 at bottom of page])
      Hypericum canadense - lesser Canada St. John’s-wort (occasional)
      Hypericum xdissimulatum - a hybrid St. John’s-wort
      Hypericum ellipticum - pale St. John’s-wort (occasional)
      Hypericum gentianoides - orange-grass St. John’s-wort (occasional)
      Hypericum mutilum - dwarf Canada St. John’s-wort (occasional)
      Hypericum perforatum - common Canada St. John’s-wort (common)
      Hypericum prolificum - shrubby Canada St. John’s-wort (uncommon)
      Hypericum punctatum - spotted Canada St. John’s-wort (occasional)
   Triadenum (2 species)
      Triadenum fraseri - Fraser’s marsh-St. John’s-wort (occasional)
      Triadenum virginicum - Virginia marsh-St. John’s-wort (occasional)






Hypericum (St. John’s-wort)
[information to be added]

Hypericum boreale (northern St. John’s-wort) - [information to be added]

Hypericum canadense (lesser Canada St. John’s-wort) - [information to be added]
   
(click on an image to enlarge)

Hypericum xdissimulatum (a hybrid St. John’s-wort) - [information to be added]

Hypericum ellipticum (pale St. John’s-wort) - [information to be added]

Hypericum gentianoides (orange-grass St. John’s-wort) - [information to be added]

Hypericum mutilum (dwarf St. John’s-wort) - [information to be added]

Hypericum perforatum (common St. John’s-wort) - [information to be added]

(click on image to enlarge)

Hypericum prolificum (shrubby St. John’s-wort) - [information to be added]

(click on image to enlarge)

Hypericum punctatum (spotted St. John’s-wort) - [information to be added]


Triadenum (marsh-St. John’s-wort)
[information to be added]

Triadenum fraseri (Fraser's marsh-St. John’s-wort) - [information to be added]

Triadenum virginicum (Virginia marsh-St. John’s-wort) - [information to be added]


Note:
   1. Frequency designations are from the paper “Vascular flora of the Acadia National Park region, Maine” by Craig W. Greene, Linda L. Gregory, Glen H. Mittelhauser, Sally C. Rooney, and Jill E. Weber, published in the spring 2005 issue (vol. 107, No. 930) of Rhodora: Journal of the New England Botanical Club.