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ARENARIUM  Brotero, 1805

Synonyms :

Sedum anglicum ssp. arenarium  (Brotero) Coutinho (1913)

Sedum anglicum [?] arenarium  Sampaio (1947)


Distribution : Portugal to western and central Spain, abundant on sandy and gravelly places from lower altitudes.



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


Glabrous annual herbs with erect or spreading and ascending shoots, shoots usually basally much branched, often red, to 10 (-12) cm tall.


Leaves alternate, sessile with a short spur, ovoid to oblong and terete or semiterete, 3 - 4,5 mm, obtuse, bright green often tinged red.


Inflorescences : Cymes with 2-3 cincinni, bracts 2 per flower, pedicels 0.5 - 1 mm.


FIowers 5-merous, sepals basally free, spurred, unequal, oblong or elliptic, to 2,5 mm, obtuse, petals free, lanceolate, acuminate, 3 - 5 mm, white, often tinged red, filaments white, anthers red.


Cytology : 2n = 24, 48.


A very variable species, belonging to the comparium of Ser. Anglica 't Hart. As the synonyms show it has long been considered to be no more than a variety of S. anglicum of which - without flowers - it is not easily distinguished.


See also S. anglicum and S. farinosum

Sedum arenarium is extremely common in C. Portugal. It only grows at low altitudes.

Sedum arenarium near Coimbra.

Photos Ray Stephenson

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