Dionysia zschummelii

Guest photographer: Marijn van den Brink

Botanical Description
Dionysia zschummelii
Forming very dense efarinose cushions. Leaves 5-6mm long, 1.5mm wide, bluish green, sparsely covered with short hairs, margin sharply reflexed. Corolla pale lilac to lavender, 10-12mm diameter, tube 10-11mm long, divided into ovate, rather deeply emarginate lobes. Discovered in 2001 and initially considered to be a microform variety of D. archibaldii, it is now considered sufficiently distinct to be given species rank. Known only from Ghadee Kuh, between Aligoudarz and Shoulabad in Lorestan Province, Iran where it grows on limestone cliffs, 2400-2700m. Whilst relatively easy to grow when young, mature specimens are less often seen and it is still relatively uncommon in cultivation. DZ I 01-17, T4Z166, JLMS02-111, CIA148-1, CIA148-2, CIA148-4. 
Reference: ALPINE GARDEN SOCIETY PLANT ENCYCLOPAEDIA
Acronyms

Some other interesting websites:
Greek Mountain Flora
Vanlife One
Primula World
Androsace World
Botanical Garden of the University Tübingen Germany
Gothenburg Botanical Garden Sweden
Utrecht Botanic Gardens Netherlands
Royal Botanic Garden Edinburgh UK
Alpine Garden Society Encyclopaedia