ROSEA L., 1753
Synonyms :
Sedum rosea (L.) Scopoli (1771)
Rhodiola minor Miller (1768)
Rhodiola odorata Lamark (1778)
Rhodiola odora Salisbury (1796)
Sedum rhodiola DC (1805)
Sedum elongatum Ledebour (1830) / Rhodiola elongata (Ledebour) Fischer & C.A.Meyer (1841) / Sedum rhodiola var. elongatum ( Ledebour) Maximowicz (1883) / Sedum rosea var. elongatum (Ledebour) Praeger (1921) / Rhodiola rosea ssp. elongata (Ledebour) Jacobsen (1973)
Sedum altaicum G.Don (1834)
Rhodiola sibirica Sweet (1839)
Sedum rhodiola var. crispum Regel & Tiling (1858)
Sedum rhodiola var. latifolium Regel & Tiling (1858)
Sedum rhodiola var. lingulatum Regel & Tiling (1858)
Sedum rhodiola var. oblongum Regel & Tiling (1858) / Rhodiola rosea var. oblonga (Regel & Tiling) H. Hara (1937)
Sedum rhodiola var. viride Regel & Tiling (1858)
Sedum rhodiola var. vulgare Regel & Tiling (1858) / Sedum rosea var. vulgare (Regel & Tiling) Maximowicz ex Praeger (1921) / Rhodiola rosea var. vulgaris (Regel & Tiling) H.Hara (1937)
Sedum rhodiola var. linifolia Regel & Schmalhausen (1878)
Sedum rhodiola var. tachiroei Franchet & Savatier (1878) / Sedum rosea var. tachiroei (Franchet & Savatier) Praeger (1921) / Rhodiola tachiroei (Franchet & Savatier) Nakai (1938) / Rhodiola rosea var. tachiroei (Franchet & Savatier) H. Hara ex Honda (1957) / Rhodiola rosea ssp. tachiroei (Franchet & Savatier) Jacobsen (1973)
Sedum rhodiola subvar. continentale Maximowicz (1883) / Sedum rosea subvar. continentale (Maximowicz) Maximowicz ex Berger (1930)
Sedum suboppositum var. telephioides Maximowicz (1883) / Rhodiola telephioides (Maximowicz) S.H.Fu (1980)
Rhodiola lapponica Gandoger (1886)
Rhodiola scopolii A.Kerner ex Simonkai (1887) / Sedum rhodiola var. scopolii (A.Kerner ex Simonkai) Rouy & Camus (1901) / Rhodiola rosea var. scopolii (A.Kerner ex Simonkai) Soó (1974)
Sedum roanense Britton (1903) / Rhodiola roanensis (Britton) Britton (1903) / Sedum rosea var. roanense (Britton) Berger (1930) / Rhodiola rosea ssp. roanensis (Britton) Jacobsen (1973)
Sedum caerulans Leveillé & Vaniot (1904)
Rhodiola hideoi Nakai (1938)
Rhodiola maxima Nakai (1938)
Sedum rosea var. microphyllum Fröderström (1938) / Rhodiola rosea var.microphyllum (Fröderström) S.H.Fu (1965)
Rhodiola arctica Borissova (1939) / Sedum arcticum (Borissova) Ronning (1959) / Rhodiola rosea ssp. arctica (Borissova) A. Löve (1961) / Sedum rosea ssp. arcticum (Borissova) J.P.Kozhevnikov (1989)
Rhodiola iremelica Borissova (1939)
Rhodiola sachalinensis Borissova (1939) / Sedum sachalinense (Borissova) Voroschilov (1966) / Rhodiola rosea ssp. sachalinensis (Borissova) S.Gontcharova (1999)
Rhodiola krivochzhinii Siplivinsky (1974) / Tolmachevia krivochzhinii (Siplivinsky) A.Löve & D.Löve (1976) / Rhodiola rosea ssp. krivochzhinii (Siplivinsky) S.Gontcharova (1999)
Section Rhodiola
Distribution: Nothern, central and southern Europe (westwards to the Pyrénées, southwards to southern Bulgaria), Russia (Ural, Siberia), Mongolia, nothern China, Korea, Japan, Sakhalin, Kuriles, North America (nothern USA and Canada), Greenland.
Description (according to H. Ohba in IHSP, 2003) :
Dioecious, 5 – 50 cm tall.
Rhizomes cylindrical to long obconical, branched when well developed, 1 – 2 cm in diameter.
Flowering stems 1 – 3 (-4 or more), 1 – 6 mm in diameter, glabrous, smooth, pale green, sometimes glaucous.
Leaves remote throughout, widely spreading, sessile, oblong or obovate to oblanceolate or ovate (0,4-) 1 – 3 (-4) x (0,3-) 0,6 – 1,7 (-2) cm, pale green, tip often tinged red, ± glaucous beneath, glabrous, smooth, tip round to acute, base shallowly cordate to truncate or round, sometimes amplexicaul, margin nearly entire to irregularly and sparsely serrulate.
Inflorescences 25- to 50- (to 70-) flowered, 1 – 2 (-3) x 2 – 4 (-5) cm in diameter, pedicels < 2 mm, smooth.
Flowers 3 – 7 mm in diameter, calyx 2 – 2,5 mm, glabrous, lobes linear-subulate to narrowly triangular, 1,8 – 2,3 mm (male) or 2 – 2,7 mm (female), ascending, petals yellow-green, linear to narrowly oblong (male) or linear-subulate (female), 2,5 – 3 (-3.5) mm (male) or 2,2 – 2,5 mm (female), widely spreading (male) or suberect (female); stamens longer than the petals; filaments yellow, (3,5) 4 – 5 mm; anthers yellow.
Cytology : 2n = 18, 22, 32, 33, 36
Vernacular name: « Roseroot »