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Origin and bioclimatic zones of the studied Plantago species.
| Species | Subgenus | Location | Latitude | Longitude | Bioclimatic Zones |
|---|---|---|---|---|---|
| P. coronopus L. | Coronopus | Hergla/Sousse | 35°58′52.07″ | 10°31′38.14″ | Semi-arid inferior |
| P. crassifolia Forsk. | Coronopus | Djerba/Mednine | 33°49′52.96″ | 11°2′17.67″ | Arid inferior |
| P. ovata Forsk. | Psyllium | Tataouine | 32°55′8.63″ | 10°24′59.45″ | Saharian superior |
| P. afra L. | Psyllium | Bouargoub | 36°28′34.84″ | 10°36′46.35″ | Semi-arid superior |
