Rhodiola integrifolia

Rhodiola integrifolia is a species of flowering plant in the stonecrop family known by the common names ledge stonecrop,[1] 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.[2]

Rhodiola integrifolia
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Saxifragales
Family:	Crassulaceae
Genus:	Rhodiola
Species:	R. integrifolia
Binomial name
Rhodiola integrifolia Raf.
Synonyms
Sedum integrifolium Sedum rosea

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.[3] 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.[3] It is treated as a federally listed threatened species in the United States.[3]