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FOC | Family List | FOC Vol. 8 | Crassulaceae

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.

1 Plants densely grayish pubescent   1 P. selskianus
+ Plants glabrous.   (2)
2 (1) Rootstock tuberous, roots carrot-shaped, robust; stems few, erect.   (3)
+ Rootstock not tuberous, roots not carrot-shaped or absent; stems numerous, ascending or decumbent (sometimes erect in P. middendorffianus).   (4)
3 (2) Carpels 5   2 P. aizoon
+ Carpels 8(or 12 or 20)   3 P. hsinganicus
4 (2) Leaves linear-spatulate, 0.3-0.5 cm wide   4 P. middendorffianus
+ Leaves not linear-spatulate, 0.5-3 cm wide.   (5)
5 (4) Stems many branched; sepals linear to oblanceolate   5 P. floriferus
+ Stem simple or few branched; sepals lanceolate, triangular-linear, or suboblong (sometimes linear in P. hybridus).   (6)
6 (5) Stems branched, decumbent; sepals linear to suboblong; follicles initially suberect, stellately divergent at maturity   8 P. hybridus
+ Stems simple, ascending; sepals lanceolate to triangular-linear; follicles stellately horizontally spreading.   (7)
7 (6) Leaves sessile, oblanceolate, spatulate, or obovate   6 P. kamtschaticus
+ Leaves pseudopetiolate, oblong, elliptic, or ovate   7 P. odontophyllus

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