Petrosedum
General Information   |   Species   |   Hybrids

OCHROLEUCUM  (Chaix) Niederle, 2014

Co je doopravdy Sedum rupestre 1., Skalničkářův rok 69: 56.

Synonyms :

Sedum ochroleucum Chaix (1786) / Sedum rupestre ssp. ochroleucum (Chaix) Hegi & Em. Schmid (1922)

Sedum anopetalum DC. (1808) / Sedum rupestre ssp. anopetalum (DC.) Arcang. (1882) / Petrosedum anopetalum (DC.) Grulich (1984) / Petrosedum rupestre ssp. anopetalum (DC.) Velayos (1989)

Sedum rufescens Ten. (1811)

Sedum hispanicum DC (1815)

Sedum verlotii Jord. (1860)

 

Distribution : Switzerland, France, Italy, Albania, Bulgaria, Hungary, Romania, Serbia, Croatia, Macedonia, Slovenia, Greece, Turkey (European part)

 

 

Description (according to IHSP 2003) :

 

Glabrous perennial herbs; sterile branches ± procumbent, rooting.

 

Leaves imbricate, linear-oblong, mucronate, terete, basally spurred, 10 - 15 mm, green or glaucous.

 

Inflorescences : Flowering branches erect or ascending, 15 - 40 cm, inflorescences terminal corymbs with 3 - 5 branches, densely glandular-pubescent, erect and flat-topped in bud, branches scarcely recurved, bracts leaf-like, glandular-pubescent.

 

Flowers (5 - to) 6 - to 8-merous, subsessile, sepals basally connate, equal, triangular, long acuminate, 5 - 7 mm, densely glandular-pubescent, petals free, oblong, cream-coloured or greenish-white, 8 - 10 mm, erect during anthesis, filaments white, glabrous, anthers yellow.

 

Cytology : 2n = 34, 68, 102

Ray Stephenson writes (Sedum, Cultivated Stonecrops, 1994, p. 121) : "Petals are very distinct as they remain upright. Pedicels, bracts, and huge sepals have glandular hairs. Budding inflorescences are erect, fruiting inflorescences are concave, and plants usually have a fairly creeping habit. Out of flower this species is indistinguishable from P. rupestre or P. montanum."

Plants from the W range are generally much smaller and shorter while in the Balkans plants are far more robust.



All the following photos show the smaller form of P. ochroleucum.


Observation à Sucuraj, île de Hvar, Croatie, alt. 10 m sur terrain calcaire / calcareous soil.



Photo Nina Bjelovucic

P. ochroleucum, Haute Provence, Forcalquier, France :



Photo Bill Greenaway


Photo Roy Mottram

Observations sur le Mont Rose - Massif de Marseilleveyre - Marseille (France, Bouches du Rhône), alt. 10m, terrain calcaire / calcareous soil.

Crassulaceae observées: Petrosedum ochroleucum, P. sediforme, Sedum acre, S. album, S. dasyphyllum, S. litoreum,

30 mai 2010 :





Petals erect during anthesis :




Inflorescences erect and flat-topped :




16 avril 2011, plante en bouton / plant in bud :




24 septembre 2011, souffrant de la sécheresse après un été très sec / in bad shape after a very dry summer :



 

Observations sur le Mont Ventoux (France, Vaucluse), 14 mai 2011, terrain calcaire / calcareous soil.

Crassulaceae observées :

Tête des mines, alt. 840m : Petrosedum ochroleucum, P. sediforme, Sedum acre, S. album, S. dasyphyllum, Sempervivum calcareum.

Près du sommet / near the top, alt. 1900m : Petrosedum ochroleucum, Sedum acre, S. atratum, Sempervivum tectorum var. guillemotii

Près du sommet / near the top, alt. 1900m :



 

Observations à Allauch (France, Bouches du Rhône), terrain calcaire / calcareous soil.

Crassulaceae observées: Petrosedum ochroleucum, P. sediforme, Sedum acre, S. album, S. dasyphyllum, Umbilicus rupestris.

Notre Dame du château, alt. 270m,16 mars 2007 :




Notre Dame du château, alt. 270m, 22 février 2008 :




Vallon de l'amandier, alt. 260m, 10 mars 2011 :



 

Observation au col de Vauvenargues (France, Bouches du Rhône, Massif de la Sainte Victoire), alt. 960m, terrain calcaire / calcareous soil (17 mai 2009).

Crassulaceae observées :

- Alt. 410m : Petrosedum ochroleucum, P. sediforme, Sedum album, S. dasyphyllum, Umbilicus rupestris.

- Alt. 960m : Petrosedum ochroleucum, P. sediforme, Sempervivum calcareum.





Photos et textes Eric Barbier




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