Sedum
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ANNUUM  L., 1753

Synonyms :

Enchylus annuus  (L.) Ehrhart (1789) / Etiosedum annuum  (L.) A.Löve & D.Löve (1985)

Sedum parnassicum  Boissier & Heldreich in sched. (s.a.)

Sedum rupestre  Oeder (1770) 

Sedum oederi  Retzius (1779)

Sedum saxatile  G.H.Weber ex F.H.Wiggers (1780)

Sedum aestivum  Allioni (1785)

Sedum saxatile  Willdenow (1799) 

Sedum divaricatum  Lapeyrouse (1813) 

Sedum annuum var. perdurans  Murbeck (1892)

Sedum zollikoferi  F.Hermann & Stefanoff (1935)

Sedum hewittii  Chamberlain (1972) / Oreosedum hewittii  (Chamberlain) Grulich (1984)

 

Distribution : Northern Europe, Iceland, most of the mountain ranges of central and southern Europe and throughout Anatolia and Iran; gravelly places, to 3000 m.

 

 

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

 

Glabrous erect annual or rarely biennial herbs to 12 (- 20) cm tall, with simple stems or branched from the base.

 

Leaves alternate, sessile with a short broad truncate spur, oblong-elliptic to linear-elliptic, to 6 mm, obtuse or rounded, terete to subterete, bright green.

 

Inflorescences  lax cymes with (3-) 5 - 15 (-25) flowers on (1-) 2 (-3) monochasial branches, rarely with subsidiary inflorescence, bracts 2 per flower.

 

FIowers 5-merous, subsessile or on short pedicels, sepals broadly sessile, unequal, oblong-elliptic, to 3 mm, obtuse or rounded, petals oblanceolate to elliptic, ± 5 mm, acute to acuminate, yellow, sometimes tinged with red, filaments yellow, anthers yellow.

 

Cytology : 2n = 22

 

The var. perdurans is a perennial variant with decumbent branches that root in the soil, occuring sporadically in populations in the Balkan mountains and the Carpathians. The species belongs to the comparium of Ser. Alpestria  Berger.

 

 

Ray Stephenson explains : "Sedum annuum is extremely variable. I have found this species as far east as Mount Ararat on the Azerbaijan Border and know it grows well on the coast of northern Norway.

This species can show tremendous variation in a single colony.

After seeing such contrasting clones in Italy, Bulgaria, Turkey and Greece I think it is an extremely difficult species to describe."

Observations à Bassurels (Lozère - France), Col Salidès alt. 1010m, le 12 juin 2011. Sol acide schisteux :



Ray Stephenson writes (Sedum, Cultivated Stonecrops, 1994, p. 97) : "Narrow, lanceolate, sharply pointed petals are good identifying characteristics."




Insert : Seedlings of S. annuum





Observation à Bassurels - Col Salidès, le 27 mai 2012 :


Photos Eric Barbier

Florina, Greece :



Plant in cultivation from different origin :



Photos Ray Stephenson



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