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11. Phedimus Rafinesque, Amer. Monthly Mag. & Crit. Rev. 1: 438. 1817.
费菜属 fei cai shu
Herbs perennial. Rootstock thick. Stems arising from rootstock or persistent basal part of flowering stems, simple, glabrous, rarely pubescent. Leaves alternate or opposite, petiolate or sessile; leaf blade flat, margin serrate or crenate. Inflorescences terminal, cymose with 3 main branches, bractless, many flowered. Flowers sessile or nearly so, bisexual, mostly 5-merous. Sepals basally connate, fleshy, spurless. Petals spreading at anthesis, nearly free, bright yellow. Stamens 2 × as many as petals, in 2 series. Nectar scales entire or apex emarginate. Ovaries and follicles with adaxial outgrowth. Styles short, oblique or spreading at flowering. Follicles many seeded. Seeds striate.
About 20 species: Asia, Europe; eight species (two endemic) in China.
A record of Phedimus stevenianus (Rouy & E. G. Camus) 't Hart (Sedum stevenianum Rouy & E. G. Camus, based on S. roseum Steven (1812), not (Linnaeus) Scopoli (1771)) from China by H. Léveillé (Cat. Pl. Yun-Nan, 62. 1916, as S. hametianum H. Léveillé, also based on S. roseum Steven) is based on a misidentification. True P. stevenianus occurs in the Caucasus region and has never been collected in China.
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| 1 |
Plants densely grayish pubescent |
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1 P. selskianus |
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Plants glabrous. |
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(2) |
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| 2 (1) |
Rootstock tuberous, roots carrot-shaped, robust; stems few, erect. |
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(3) |
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Rootstock not tuberous, roots not carrot-shaped or absent; stems numerous, ascending or decumbent (sometimes erect in P. middendorffianus). |
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(4) |
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| 3 (2) |
Carpels 5 |
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2 P. aizoon |
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Carpels 8(or 12 or 20) |
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3 P. hsinganicus |
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| 4 (2) |
Leaves linear-spatulate, 0.3-0.5 cm wide |
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4 P. middendorffianus |
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Leaves not linear-spatulate, 0.5-3 cm wide. |
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(5) |
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| 5 (4) |
Stems many branched; sepals linear to oblanceolate |
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5 P. floriferus |
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Stem simple or few branched; sepals lanceolate, triangular-linear, or suboblong (sometimes linear in P. hybridus). |
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(6) |
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| 6 (5) |
Stems branched, decumbent; sepals linear to suboblong; follicles initially suberect, stellately divergent at maturity |
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8 P. hybridus |
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Stems simple, ascending; sepals lanceolate to triangular-linear; follicles stellately horizontally spreading. |
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(7) |
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| 7 (6) |
Leaves sessile, oblanceolate, spatulate, or obovate |
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6 P. kamtschaticus |
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Leaves pseudopetiolate, oblong, elliptic, or ovate |
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7 P. odontophyllus |
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List of lower taxa
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Treatments in Other Floras @ www.efloras.org
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