Robert W. Freckmann Herbarium


Because of technology changes and personnel changes at UWSP and the Wisconsin State Herbarium, the database of plant species housed at this site was merged with the database from the OLD WisFlora website to create a new Flora of Wisconsin website at Currently we are encouraging all Wisplant viewers to begin using the Flora of Wisconsin website as soon as possible. Wisplants will remain operational through July 13th. After that date, all traffic to Wisplants will be redirected to the Flora of Wisconsin website.

Please direct any comments to

Thank you.

  Triadenum fraseri (Spach) Gleason image
Photographer: Merel R. Black           

Andrew Hipp

Derek Anderson

Emmet J. Judziewicz

Paul E. Berry

Paul Skawinski

Paul Skawinski
Family Hypericaceae
Triadenum fraseri (Spach) Gleason
bog St. John's-wort, Fraser's marsh St. John's-wort
Triadenum: Greek for "three glands"
fraseri: for John Fraser, Jr. (1789-1861), Scottish collector of N. American plants
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: erect, perennial, 12"-24" tall forb
Flower: pinkish, 5-parted, 2/3"-3/4" wide, sepals elliptical or oblong; inflorescence a branched, terminal cluster (cyme); blooms July-Aug.
Fruit:oval to cylindrical, 3 chambered, abruptly-narrowing, orange capsule
Leaf:oblong, 2-3 times as long as wide, rounded at the tip, stalkless, dark-dotted below with translucent glands
Habitat: wet; bogs, marshes, shores

More Information Natural Communities Herbarium Specimens
All Triadenum list Google- Images or Text
Elodea fraseri Spach
Hypericum virginicum L. var. fraseri (Spach) Fernald
Triadenum virginicum (L.) Raf. subsp. fraseri (Spach) J.M.Gillett
Triadenum virginicum (L.) Raf. var. fraseri (Spach) Cooperr.

Botany News/Events
Book We Recommend
Historical Botanists
Other Links
Botanical Club of Wisconsin (off site)
UW-Stevens Point Biology Dept.
Plants of Wisconsin
Vascular Plants
Natural Communities
Botany News/Events
Other Links
Lichens (off site)   
Tom Volk's Fungi (off site)
Taxonomy of Vascular Plants
                          Vascular Plants
Browse by Identification Guides
Family Wildflowers
Genus Trees
Common Names Shrubs
Search by Vines
Names Aquatic-Semi aquatic
Specimens Ferns - Fern Allies
Blooming Times Grasses, Sedges, or Rushes
County & Status Other Resources  
Town Range Taxonomy of Vascular Plants
  WI Checklist & CofC Values
Browse by:
Common Name
Search by:
Copyright 2012 Permissions Contact Us Web Map