Diastema is a genus of flowering plants in the family Gesneriaceae. It contains approximately 20 species ranging from Mexico to Bolivia and Venezuela.
Species 20 species are accepted. Diastema affine Fritsch Diastema comiferum (DC.) Benth. ex Walp. Diastema eggersianum Fritsch Diastema fimbratilobum Diastema gymnoleucum Gilli Diastema hispidum (DC.) Fritsch Diastema incisum Benth. Diastema kalbreyeri Fritsch Diastema latiflorum Rusby Diastema maculatum (Poepp.) Benth. ex Walp. Diastema purpurascens Rusby Diastema racemiferum Benth. Diastema rupestre Brandegee Diastema scabrum (Poepp.) Benth. ex Walp. Diastema sodiroanum Fritsch Diastema tenerrimum (Poepp.) Benth. ex Walp. Diastema urticifolium (Poepp.) Benth. ex Walp. Diastema vexans H.E.Moore Diastema weberbaueri Fitsch Diastema williamsii Rusby
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