Sempervivum

TECTORUM var. TECTORUM

List of synonyms 

 

Description (according to Praeger, 1932, and IHSP, 2003) :

Rosettes usually large, open, flattish, (3-) 5 - 7 (-20) cm in diameter, offsets strong, stolons stout, to 4 cm, sparingly leafy when young.

 

Leaves glabrous or shortly glandular-pubescent, green and sometimes somewhat glaucous, variably tinged with red, usually with a purple tip, oblong-lanceolate to obovate, 20 - 60 x 10 -15 mm, with a stout pungent mucro, both sides convex (rather flat above), cilia conspicuously white.

 

Inflorescences : Flowering branches stout, 20 - 50 cm,  shaggy with white hairs, leaves ovate-lanceolate, acute, pubescent in the upper part of the stem, with cilia longer than the pubescence. Inflorescences large, dense, flattish or thyrsoid, with 40 to 100 flowers and more, bracts linear, acute, hairy, buds ovoid, conspicuously pointed.

 

Flowers 12- to 16-merous, ± 2,5 cm in diameter, sepals ± 8 mm, hairy, connate for up to 4 mm, acute, petals 9 - 12 x ± 2 mm, linear-lanceolate, acute, ciliate and pubescent below, whitish or purplish with red lines, giving a purplish effect, filaments bright red-purple, anthers red-orange.

Commentaire français. 

Compare Gérard Dumont :  http://stalikez.info/fsm/semp/5m.php

 

A plant in flower in June / Une plante en fleur en juin
The same plant in January / La même plante en janvier
Flowers of a different clone / Floraison d'un autre clone

Again another plant in August (above) and in January (below) 
Une autre plante en août (en haut) et en janvier (en bas)

Plant in cultivation in May at / Plante en culture en mai à Vauvenargues (France - Bouches du Rôhne)


Observations de Sempervivum tectorum fa. guillemotii (http://stalikez.info/fsm/semp/5y.php)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 fa. guillemotii

Landscapre at the top of Mont Ventoux / Paysages au sommet du Ventoux

Sempervivum tectorum fa. guillemotii

Photos of Sempervivum tectorum ssp. arvernense : Crassulaceae in the Cévennes mountains I and Crassulaceae in the Cévennes mountains II

by Eric Barbier

Sempervivum tectorum var. tectorum :

Photos Eduardo Carbonell

« back