Rhodiola integrifolia

{{Short description|Species of plant}}

{{Speciesbox

| image = Rhodiola_integrifolia_habitus.jpg

| image_caption =

| status = {{TNCStatus}}

| status_system = TNC

| status_ref = {{cite web |last1=NatureServe |title=Rhodiola integrifolia |url=https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.132989/Rhodiola_integrifolia |access-date=6 March 2024 |location=Arlington, Virginia |date=2024}}

| genus = Rhodiola

| species = integrifolia

| authority = Raf.

| subdivision_ranks = Subspecies

| subdivision_ref = {{cite POWO |id=219402-2 |title=Rhodiola integrifolia Raf. |access-date=6 March 2024}}

| subdivision = {{Species list

|Rhodiola integrifolia subsp. integrifolia |

|Rhodiola integrifolia subsp. leedyi |(Rosend. & J.W.Moore) H.Ohba

|Rhodiola integrifolia subsp. neomexicana |(Britton) Kartesz

}}

| synonyms_ref =

| synonyms = {{Collapsible list |

{{Species list

|Rhodiola rosea subsp. integrifolia |(Raf.) Kozhevn. (1981)

|Rhodiola rosea var. integrifolia |(Raf.) Jeps. (1925)

|Rhodiola rosea subsp. integrifolia |(Raf.) H.Hara (1952)

|Sedum integrifolium |(Raf.) A.Nelson (1909)

|Sedum rosea subsp. integrifolium |(Raf.) Hultén (1945)

|Sedum rosea var. integrifolium |(Raf.) A.Berger (1930)

|Tolmachevia integrifolia |(Raf.) Á.Löve & D.Löve (1975)

}}

}}

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Rhodiola integrifolia is a species of flowering plant in the stonecrop family known by the common names ledge stonecrop,{{PLANTS|id=RHIN11|taxon=Rhodiola integrifolia|accessdate=21 October 2015}} western roseroot, and king's crown. It is native to north-easternmost Russia, including Kamchatka, and western North America, where it grows in mountainous habitat in subalpine and alpine climates, including meadows, cliffs, and talus. It is a perennial herb producing a stout stem from a fleshy, branching caudex, reaching a maximum height near 30 centimeters. The fleshy leaves are alternately arranged on the stem, widely lance-shaped to oval and pointed, flat but upcurved toward the tip, reaching 2.5 centimeters long. They are green when new and age to orange, rose, or red. The inflorescence is a dense cyme of up to 50 flowers with fleshy petals in shades of bright red to deep purple. The fruits are red, rounded ovals with pointed tips.{{cite book |author=Elizabeth Wenk |title=Wildflowers of the High Sierra and John Muir Trail |year=2015 |publisher=Wilderness Press |isbn=978-0-89997-738-6}}

There are several subspecies of this plant, with one, ssp. leedyi, very rare and limited to a few populations in Minnesota and upstate New York.[http://www.centerforplantconservation.org/collection/cpc_viewprofile.asp?CPCNum=7501 Center for Plant Conservation] {{webarchive|url=https://web.archive.org/web/20101029061217/http://centerforplantconservation.org/Collection/CPC_ViewProfile.asp?CPCNum=7501 |date=29 October 2010 }} This subspecies is considered a relict from times when its range was covered in glaciers; it survives on barren cliffs which are kept cold by air blowing through cracks from caves. It is treated as a federally listed threatened species in the United States. In 2024, a team at Cornell University successfully established a population of the plants in a nearby canyon, helping to prevent the plant from becoming extinct.{{cite web |url=https://news.cornell.edu/stories/2024/01/cascadilla-gorge-offers-safe-haven-rare-species |title=Cascadilla Gorge offers a safe haven for rare species |last=Hooper |first=Anna |date=13 January 2024 |publisher=Cornell Chronicle |access-date=1 February 2024}}