Rhodiola integrifolia
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Rhodiola integrifolia in New Mexico |
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| Raf. |
Rhodiola integrifolia is a species of the genus Rhodiola within the thick-leaf family (Crassulaceae). It iswidespreadin the cold regions of northeastern Russia and on the west coast of North America (there called Ledge Stonecrop, Western Roseroot or King's Crown).
description
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Vegetative characteristics
This perennial plant forms short stems from a fleshy, branched caudex . The upright stems are 3 to 30 centimeters high. The plant parts are hairy and feel slightly sticky.
The alternate and densely arranged leaves are sedentary and quite resistant. The simple, fleshy leaf blades are ovate-lanceolate with a length of 7 to 25 millimeters and a width of up to 1 centimeter. The leaf margin is entire or toothed. Young leaves are green but turn orange-reddish over time.
Generative characteristics
Rhodiola integrifolia is mostly diocese . The terminal, dense, zymous inflorescence contains up to 50 flowers. The flowers are five-fold with a double flower envelope . The five sepals are ovate-lanceolate with a length of 1 to 2 millimeters. The clearly free, purple to greenish-pink petals are fleshy and egg-shaped with a length of 2 to 3 millimeters. There are ten stamens.
The short capsule fruit has five chambers.
The number of chromosomes is 2n = 22.
Occurrence and endangerment
Rhodiola integrifolia is distributed over northeastern Russia ( Kamchatka ) and westernmost North America . It thrives in stony locations, for example on cliffs and scree slopes in subalpine and alpine altitudes .
The subspecies Rhodiola integrifolia subsp. leedyi is very rare and is limited to a few locations in Minnesota and upstate New York . It is believed that this subspecies is a relic of the Ice Ages. It occurs only on dry cliffs, the surroundings of which are cooled by cold air from crevices in the earth. This subspecies is classified as Endangered in the United States .
Systematics
The first publication of Rhodiola integrifolia was by Constantine Samuel Rafinesque-Schmaltz . The specific epithet integrifolia refers to the entire leaves. Synonyms for Rhodiola integrifolia Raf. are: Sedum integrifolium (Raf.) A. Nelson , Sedum roseum subsp. integrifolium (Raf.) Hultén .
Of Rhodiola integrifolia several subspecies have been described:
- Rhodiola integrifolia Raf. subsp. integrifolia
- Rhodiola integrifolia subsp. leedyi (Rosend. & JWMoore) Kartesz
- Rhodiola integrifolia subsp. neomexicana (Britton) H.Ohba
- Rhodiola integrifolia subsp. procera (RTClausen) card
Individual evidence
- ↑ Rhodiola integrifolia - USDA data sheet.
- ↑ Rhodiola integrifolia at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ^ A b c Center for Plant Conservation . ( Memento of the original from October 29, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
