Square-stalked St. John’s-wort, Hypericum tetrapterum, in Peel Region, Ontario: a New Non-native Vascular Plant Species for Eastern North America | Zendy

Charles P Cecile | Zendy; Michael J. Oldham | Zendy

Open Access

Square-stalked St. John’s-wort, <i>Hypericum tetrapterum</i>, in Peel Region, Ontario: a New Non-native Vascular Plant Species for Eastern North America

Author(s) -

Charles P Cecile,

Michael J. Oldham

Publication year - 2016

Publication title -

the canadian field-naturalist

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.21

H-Index - 28

ISSN - 0008-3550

DOI - 10.22621/cfn.v130i3.1886

Subject(s) - hypericum , square (algebra) , geography , white (mutation) , swamp , archaeology , botany , biology , ecology , biochemistry , geometry , mathematics , gene

The Eurasian Square-stalked St. John’s-wort (Hypericum tetrapterum Fr.: Hypericaceae) was found growing in an open Eastern White Cedar (Thuja occidentalis L.) swamp in Caledon, Regional Municipality of Peel, Ontario. This is the first record for eastern North America; previous North American occurrences have been on the Pacific coast in Vancouver, British Columbia, Canada (1991), and in Wahkiakum County, Washington State, USA (2003).

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