Vascular Plants of North Carolina
Account for Dwarf St. John's-wort - Hypericum mutilum   L.
Members of Hypericaceae:
Members of Hypericum with account distribution info or public map:
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Section 6 » Order Theales » Family Hypericaceae
AuthorL.
DistributionThroughout the state, undoubtedly found in all 100 counties.

Not only is this species found throughout the eastern US and southeastern Canada, it is found in almost all counties east of the Mississippi River, north to IA and WI. Probably no other Hypericum species is as widespread as this one.
AbundanceCommon to very common over nearly all of the state, probably less numerous at high elevations.
HabitatThis is a wetland species of a great variety of open damp and wet areas. It occurs in fresh marshes, ditches, wet meadows, lake and pond margins, and other mostly sunny wetlands (other than blackwater ones, savannas, etc.). It may be the most numerous Hypericum in the state, in terms of number of individuals.
PhenologyBlooms from June to October, and fruits shortly after blooming.
IdentificationThis is a very slender and sparsely branched (from upper axils) herb growing to about 1’ tall. It has small, opposite ovate to elliptic leaves that are rounded at the base, but are sessile; they grow only to about ½” long. In addition, the yellow flowers are also quite small, being only about 1/8-1/4” across; they are found mostly at branch tips. Though it is quite small in most regards, it is typically easily identified by its small rounded and opposite leaves and its marsh/ditch/wet ground habitat; plus, as it is very common, it is seen often in the field.
Taxonomic CommentsThere are several varieties of this widespread species, but the only one known in NC is the nominate one – H. mutilum var. mutilum.

Other Common Name(s)None
State RankS5
Global RankG5
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