Convolvulaceae - Concolvulus cantabrica-1.JPG
Dettaglio - Convolvulaceae Convolvulus cantabarica Lin. - Erbario Frizzi Perugia G. 2446.jpg
La flore et la pomone francaises (Plate 12) BHL306314.jpg
Global Biodiversity Information Facility
Open Tree of Life reference taxonomy version 3.6
Species Plantarum. 1st Edition, Volume 1
Royal Horticultural Society Plant Database