Petromarula is a genus of plants in the family Campanulaceae. There is only one known species, Petromarula pinnata, endemic to the island of Crete in the Mediterranean.Kew World Checklist of Selected Plant FamiliesLammers, T.G. (2007). World checklist and bibliography of Campanulaceae: 1-675. The Board of Trustees of the Royal Botanic Gardens, Kew. The name "Petromarula" means "rock lettuce" in Greek, a reference to the plant's traditional use in salads.West Crete flowers, rock lettuce, Petromarula pinnata
Description Petromarula pinnata is a robust, medium to tall perennial, minutely hairy above. Leaves mostly in a large basal rosette, pinnate to pinnately-lobed, the lower long-stalked; leaflets oval to oblong, coarsely toothed. Flowers pale blue, 9–10 mm, borne in large rather narrow panicles; corolla with 5 spreading to recurved linear lobes. Capsule opening by 3 pores in the middle. Flowers April–May.Mediterranean Wild Flowers, Marjorie Blamey & Christopher Grey-Wilson, HarperCollinsPublishers, 1993,
Habitat Rock crevices, cliffs and old walls.
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Cretan Flora, Petromarula pinnata Flowers of Chania, Petromarula pinnata Dave's Garden, PlantFiles: Cretan Wall-Lettuce Petromarula pinnata Cretan Vista, Flowers of Northwest Crete, Bellflower, Petromarula pinnata First Nature, Petromarula pinnata - Rock Lettuce Biodiversity Sitia, Βιοποικιλότητα Δήμου Σητείας | Petromarula pinnata Πετρομάρουλο