Members of the geranium family (Geraniaceae) native to Thailand are enumerated. Two genera, Geranium (3 species) and Pelargonium
(1 species) are recognized. Pelargonium is a new genus record for Thailand and Asia Major (except Asia Minor-Anatolia). Keys to
the Thai species, descriptions, information on distribution and ecology, as well as conservation status, are provided
Keywords
Geraniales, Doi Chiang Dao, endemic species, disjunct distribution, taxonomy