Sedum
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ATRATUM  L., 1763

Synonyms :

Sedella atrata (L.) Fourreau (1868)

Sedum atratum var. viride  E.P.Perrier

Sedum haematodes  Scopoli (1772)

Sedum rubens Jacquin ex Nyman (1879)

Sedum atratum var. carinthiacum  Hoppe ex Pacher (1885) / Sedum carinthiacum  (Hoppe ex Pacher ) Fritsch (1897) / Sedum atratum ssp. carinthiacum  (Hoppe ex Pacher) Webb (1964) / Sedella carinthiaca (Hoppe ex Pacher) A.Löve & D.Löve (1985)

Sedum erubescens  Sennen (1927)

Distribution : SW, C and SE Europe (Pyrenees, Alps, W Carpathians, Appennini, mountains of  the Balkan peninsula), eastwards to Slovakia, W Ukraine and Romania; common on limestone rocks and gravel, 1000 – 3200 m.

 

Description  (according to 't Hart & Bleij in IHSP 2003) :

 

Usually biennial herbs, 2 – 8 cm tall, glabrous, yellowish-green to glaucous-green, usually flushed with dark purple, esp. in dry conditions and when flowering.

 

Roots fibrous; young plants as sessile rosettes with congested leaves.

 

Leaves narrowly clavate, almost terete, obtuse, 4 – 9 mm; flowering plants with erect, simple or branched stems and more distant leaves.

 

Inflorescences almost corymbose.

 

Flowers  ± sessile, 5-merous, ± cupshaped, sepals ± 2 mm, triangular-ovate, somewhat acute, petals remaining erect or slightly spreading, 3 – 4 mm, whitish, greenish or reddish.

 

Cytology : 2n = 16

 

Note :

Ray Stephenson writes (Sedum, Cultivated Stonecrops, 1994, p. 106) : "Flowers 5- or 6-partite...Short pedicels widen into a funnel-shaped calyx tube from which deltoid sepals rise. Petals can be wavy."

Mont Ventoux (France - Vaucluse), 1830 m, limestone / substrat calcaire (15. May 2011) :





Plants in bud / en bouton :




Villars de Lans - Massif du Vercors (France - Isère) 1720 m, limestone / substrat calcaire. (1. August 2008) :





Plants with seed / fructification :



Photos Eric Barbier

S. atratum en fleur - Commune des Orres (France - Hautes Alpes) alt. env. 2700m, juillet 2011 :





Photos Sylvain Jouny



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