Erodium toussidanum Guitt.
Erodium toussidanum is an annual with stems 0-15cm.
Leaves: leaves small, narrowly oval, almost trilobed and similar to those of E. maritimum.
Inflorescence: Sepals with a blunt mucro.
Fruit: Rostrum 15-18mm; foveole small, suborbicular, bordered by a small fold, eglandular and lacking infrafoveolar furrow; awn with 4-6 turns and with very tight basal turns and with rigid hairs of unequal length on the outside.
Distribution: endemic to Toussidé (N Africa, Sahara, N W Chad) at 3000m in tufa, in front of extinct volcanic fumaroles which still emit water vapour.
Its mericarps with an awn with 4-6 turns and with very tight basal turns and with rigid hairs of unequal length on the outside, makes it possible to distinguish this species from E. chium. The small and suborbicular foveole and the sepals with blunt mucro allow it to be separated from E. alnifolium.
