From the Lordegan area we went northwest through the Zagros mountains in the direction of the city of ShareKord. This whole region is very beautiful and needs some more exploring! We first went to the Zarde Kuh range and into the Kuhrang valley. From one point we could follow the Kuhrang river, after a while we saw some suitable rocks were Dionysia archibaldii could grow. On this 5th of May 2003, after a short walk, we found Dionysia archibaldii in flower on vertical north facing so called Bazoft conglomerate rocks. Altitude approx. 2500m. This Bazoft conglomerate is build up from small rounded stones which are, in a way, cemented together. In some places water was dripping down on plants, many of them growing under overhanging rocks. The late Jim Archibald first discovered this species in 1966. Also this species has a limited distribution. Its not really an easy species in cultivation, but can be propagated by cuttings quite easy.
Plants form greyish, rather lax cushions, up to 30cm across. Leaves oblong-elliptic, 4-7.5mm long, covered in short glandular hairs, the margin revolute, indistinctly toothed. Flowers solitary and sessile; corolla pale pinkish-violet to purple, the tube 12-14mm long, the limb 12-16mm diameter with heart-shaped lobes clearly notched at the apex. Only known from the area between the Kuhrang and Bazoft Valleys, Bakhtiari Province, Western Iran, on shaded and semi-shaded limestone cliffs, 2250-4300m. The single clone which persisted from the original JCA3010 introduction was particularly lax but when the SLIZE expedition made further introductions in 1998 it became apparent how variable the species is. Jamzad (1996) described a new species Dionysia bazoftica, said to differ from Dionysia archibaldii in several minor ways but following close examination of the original type specimen Lidén reviewed this conclusion, resulting in D. bazoftica being sunk in synonymy. At least two, particularly fine forms, have been given clonal names. Collections in cultivation are JCA3010, SLIZE115, SLIZE116, SLIZE117, SLIZE135, T4Z135, T4Z137, JZZ05-172, JLMS02-87 and KUHI259a-1. There are numerous f1 and f2 hybrids in cultivation.
Reference: ALPINE GARDEN SOCIETY PLANT ENCYCLOPAEDIA
Some other interesting websites:
Greek Mountain Flora
Botanical Garden of the University Tübingen Germany
Gothenburg Botanical Garden Sweden
Utrecht Botanic Gardens Netherlands
Royal Botanic Garden Edinburgh UK
Alpine Garden Society Encyclopaedia