{{Short description|Species of flowering plant}} {{Speciesbox | image = Hypericum buckleyi.jpg | image_caption = In situ at Blood Mountain, Georgia | status = G3 | status_system = TNC | status_ref = [https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.140682/Hypericum_buckleii] | genus = Hypericum | display_parents = 2 | parent = Hypericum subsect. Pseudobrathydium | species = buckleyi | authority = M.A.Curtis | synonyms = ''Hypericum buckleii'' }}
'''''Hypericum buckleyi''''', commonly known as '''Blue Ridge St. John's wort''', '''Buckley's St. John's wort''', or '''Granite dome St. John's wort''' is a rare species of Hypericum in the family Hypericaceae. ''Hypericum buckleyi'' is small shrub endemic to the southern Appalachian Mountains of the southeastern United States.{{r|usda|hyp|name6=Flora of the Southeastern United States}}
==Description== ''Hypericum buckleyi'' is a small, decumbent shrub, growing up to {{convert|45|cm|abbr=on}} tall and spreading to form low, compact mats. It has peeling, reddish stems with thin bark. The oblong or oblanceolate leaves are sessile or subsessile, up to {{convert|25|mm|abbr=on}} long and {{convert|12|mm|abbr=on}} broad. The species typically flowers in early July, typically they only produce one blossom per flowerhead, but there may be up to 5.<ref>{{Cite journal |date=30 June 1921 |title=The first Hypericum |url=https://www.jstor.org/stable/i40114508 |journal=Bulletin of Popular Information (Arnold Arboretum, Harvard University) |volume=7 |issue=12 |pages=48|doi=10.5962/p.321155 }}</ref> The flowers are {{convert|20–25|mm|abbr=on}} across with 5 golden yellow petals, becoming reflexed with age. The ovaries have three parts, forming narrowly ovoid to cylindric capsules.<ref name="hyp">{{Cite web|title=Hypericum buckleyi|url=http://hypericum.myspecies.info/taxonomy/term/897|access-date=2018-10-21|website=hypericum.myspecies.info}}</ref>
==Distribution and habitat== ''Hypericum buckleyi'' has a limited range, known only to occur at {{convert|900-1560|m|abbr=on}} in northeastern Georgia, northwestern South Carolina, and southwestern North Carolina.<ref name="usda">{{PLANTS|id=HYBU|taxon=Hypericum buckleii|access-date=12 February 2016}}</ref> A montane species, they are most often found on thin soils over rock outcrops, barrens, glades and balds, particularly over exfoliated granite domes.<ref>{{Cite web |title=Hypericum buckleii |url=https://georgiabiodiversity.org/profile/profile?group=all&es_id=21435 |access-date=2023-06-22 |website=georgiabiodiversity.org}}</ref><ref name=":0">Weakley, A.S., and Southeastern Flora Team. 2025. Flora of the southeastern United States Web App. University of North Carolina Herbarium, North Carolina Botanical Garden, Chapel Hill, U.S.A. https://fsus.ncbg.unc.edu/main.php?pg=show-taxon-detail.php&lsid=urn:lsid:ncbg.unc.edu:taxon:{C4DA67B6-1F8D-4A21-B86B-BDE3ED5A594D}. Accessed Oct 20, 2025</ref> Though their habitat can include wetter areas such as seeps and moist crevices as well.<ref name=hyp/>
== Conservation == NatureServe lists the species as vulnerable (G3) globally, vulnerable in North Carolina (S3), critically imperiled in Georgia (S1), and presumed extirpated in South Carolina (SX).<ref>{{Cite web |title=NatureServe Explorer 2.0 |url=https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.140682/Hypericum_buckleii |access-date=2023-06-22 |website=explorer.natureserve.org}}</ref>
==References== {{Reflist}}{{Hypericum species Navbox}} {{Taxonbar|from=Q17812122}}
buckleyi Category:Flora of North Carolina Category:Flora of South Carolina Category:Flora of Georgia (U.S. state) Category:Taxa named by Moses Ashley Curtis