Rheum rhaponticum, spec. nov.

1. Rheum foliis glabris, petiolis subsulcatis.

Rheum foliis glabris. Hort. ups. 98. Mat. med. 198.

Rheum. Hort. cliff. 155.

Rhaponticum . Alp. rapont. 1. t. 1.

Rhaponticum folio lapathi majoris glabro. Bauh. pin. 116.

Habitat in Thracia, Scythia. ♃