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 »