羽裂紅景天·
羽裂紅景天形態特徵
多年生草本。主根粗，紡錘形，分枝少。根頸短，長1-1.5厘米，直徑1-2厘米，先端被鱗片，鱗片長圓狀三角形，長4-5毫米，寬3毫米。急尖。
花莖少數，高10-20厘米，直徑3-4毫米，直立，密被葉。
葉互生，近生，或近於3葉輪生，披針形或線狀披針形，長2-3.5厘米，寬3-5毫米，先端急尖，基部漸狹。
花序傘房狀傘形，緊密多花，着葉，長1.5-2厘米，寬2.5-3厘米；雌雄異株；
花梗比花長；萼片4，黃綠色，披針形，長4毫米，先端稍急尖；
花瓣4，黃色，披針形，或長圓狀披針形，長6毫米，先端稍鈍；
雄蕊8，長9毫米，花絲黃色，花葯圓，黃綠色；鱗片4，長1毫米，寬0.5毫米。[2]
蓇葖4，長圓狀披針形，長達8毫米，有長1-2毫米的喙；種子長圓形，長達2毫米，褐色。
花期6-8月，果期7-8月。 [3]
Rhodiola pinnatifida A. Bor. in Kom. Fl. URSS. 9: 36. Add. 8: 475. 1939.
英文介紹
Sedum pinnatifidum (Borissova) J. P. Kozhevnikov.
Main root few branched, thick, fusiform. Caudex 1-1.5 × 1-2 cm. Caudex leaves scalelike, oblong-triangular, 4-5 × ca. 3 mm, apex acute. Flowering stems few, erect, 10-20 cm × 3-4 mm, densely leafy. Stem leaves alternate, subopposite, or nearly 3-verticillate, linear-lanceolate to lanceolate, 2-3.5 × 0.3-0.5 cm, base attenuate, apex acute. Inflorescences corymbiform-umbellate, compact, 1.5-2 × 2.5-3 cm, many flowered. Flowers unisexual, unequally 4-merous in male plants, shorter than pedicel. Sepals yellowish green, lanceolate, ca. 4 mm, apex subacute. Petals yellow, lanceolate to oblong-lanceolate, ca. 6 mm, apex subobtuse. Stamens 8, ca. 9 mm, ca. 1.5 × as long as petals; filaments yellow; anthers greenish yellow, globose. Nectar scales ca. 1 × 0.5 mm. Follicles oblong-lanceolate, to 8 mm, apical beak 1-2 mm. Seeds brown, oblong, to 2 mm. Fl. Jun-Aug, fr. Jul-Aug.
About 2200 m. N Xinjiang (Altay Shan) [Mongolia, Russia].
Rhodiola pinnatifida falls within the range of variation of R. stephanii and is therefore difficult to separate from the latter species. Further study is needed to determine whether or not the two are conspecific.