Sempervivum iranicum Bornmüller & Gauba (1940) in Feddes Repertorum 49:257 (1940)
Original Description (English translation of the Latin Description): New species rosette usually the size of that of Sempervivum tectorum L., in particular 5-7 cm wide, but composed of much more numerous and shorter leaves, and thus more crowded to be included close to Sempervivum schlehanii Schott, which it resembles, due to the leaves being densely velvety on both sides; thin,very long stolons (up to 10 cm long) grow out from the base of the rosette, prostrate and finally nude; leaves of the rosettes are blue-green, of uniform colour (tip not coloured nor brownish), both below and above densely and persistently sub-velvety and minutely pubescent (soft hairs at the margin, only slightly longer, not ciliate); all the leaves (ex cept the younger inner ones, which are shorter and sharply cuspidate) are oblong and acute (neither cuspidate nor dilated at the distal part); the most external leaves are 2.5-3 cm long and 1-1.5 cm wide; flower-bearing stalk 15-20 cm long, robust, densely leafy, covered with papillae and minutely pubescent-glandular; leaves on the flower stalk up to 2.5-3 cm in length and 1-1.5 cm wide, briefly acuminate, the upper leaves only slightly shorter; at anthesis the inflorescence is compact, with three forked branches and tips of 3-6 flowers, at fructescence 3-4 cm long; flowers 12-14-meric, with patent petals 2.5 cm in diameter; the colour of the calyx is green to pale yellow, it is highly bristly and glandular, with oblong-lanceolate segments half as long as the petals (6 mm), which are linear-lanceolate, gradually becoming subulate-acuminate (2 x 14 mm), pink with generous whitish margins; the filaments are purple and approx. half as long as the petals, sparsely and lightly hairy; anthers dark-purplish; carpels 12-14, green and minutely glandularhairy, 2.5 mm long; at advanced fructescence they form a small star-shaped crown 10-12 mm in diameter (with styles spread and reflected).
Species is endemic to Alborz Mountains in N Iran.
source: Klaus Schropp, Sempervivums in Iran (http://www.crassulaceae.ch/uploads/files/pdf/Sempervivum/Sempervivum%20in%20Iran%20low%20definition.pdf)
Great article, please read it!
Habitat photos of this species I made last summer near Syah Bisheh (Iran).
more habitat photos you can see here: https://sempervivum.aforumfree.com/t2299-alborz-mountains?highlight=Alborz
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