Vascular Plants of North Carolina
Account for Mountain St. John's-wort - Hypericum graveolens   Buckley
Members of Hypericaceae:
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Section 6 » Order Theales » Family Hypericaceae
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AuthorBuckley
DistributionStrictly in the Mountains (at higher elevations as well), north to Mitchell County. As it occurs in northeastern TN, it could occur a bit farther north in the NC Mountains.

This is a narrow Southern Appalachian endemic, known so far only in NC and TN. The southernmost counties are Transylvania and Jackson.
AbundanceWithin its limited high elevation habitat (mostly over 4500 feet), it is uncommon to locally fairly common. This is a Watch List species in NC.
HabitatThis species is found mostly in exposed rocky places, such as around granitic domes, other rock outcrops, rocky forests, and roadbanks. It may occur around seepages, but it is not really a plant of such seepage areas.
See also Habitat Account for Montane Forblands and Successional Fields
PhenologyBlooms and fruits mostly in July.
IdentificationThis is a slender, mostly erect and unbranched, herb that grows in small colonies, reaching only 1 foot tall on average. It has opposite, ovate leaves that are sessile/clasping, and they reach about 1-1.5 inches long. It is very similar to H. mitchellianum, with which it hybridizes. The fairly large yellow flowers generally have no black lines but have scattered small black dots along the margin. Also, the flower clusters contain only a few flowers. H. mitchellianum usually has black lines and black spots on the top of the petals, and it has many more flowers (usually 10 or more) in its flower clusters.
Taxonomic CommentsThough always considered as a good species, it does hybridize with H. mitchellianum, which is also a narrow Southern Appalachian endemic species.

Other Common Name(s)None
State RankS2S3
Global RankG3
State StatusW1
US Status
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