Monotypic Campanulaceae genera

Platycodon grandiflorus (from Ancient Greek πλατύς (platús), meaning "flat", and κώδων (kódon) meaning "bell") is a species of herbaceous flowering perennial plant of the family Campanulaceae, and the only member of the genus Platycodon. It is native to East Asia (China, Korea, Japan, and the Russian Far East). It is commonly known as balloon flower (referring to the balloon-shaped flower buds), Chinese bellflower, or platycodon.

Hanabusaya is a monotypic genus of flowering plants in the family Campanulaceae, containing the single species Hanabusaya asiatica. It is endemic to Korea. It is known in English as diamond bluebell and in Korean as Geumgang Chorong (), having been named for the site at which it was first discovered, Geumgangsan Mountain.

Porterella is a monotypic genus of flowering plants in the bellflower family containing the single species Porterella carnosula, which is known by the common name fleshy porterella, or simply porterella.

Physoplexis comosa, the tufted horned rampion, is a species of flowering plant in the family Campanulaceae, native to alpine Europe. It is the only species in its genus, and was formerly included in Phyteuma. Molecular evidence closely links this species with Phyteuma nigrum.

Ostrowskia is a genus of plants in the family Campanulaceae. There is only one known species, Ostrowskia magnifica, native to the Central Asian nations of Afghanistan, Kyrgyzstan and Tajikistan.

Hippobroma longiflora, also called Star of Bethlehem or madamfate, is a flowering plant in the family Campanulaceae. It is the only species in the genus Hippobroma. It is endemic to Jamaica in the West Indies, but has become naturalised across the American tropics, Madagascar, southern and southeastern Asia, and Oceania.

Peracarpa is a genus of flowering plants belonging to the family Campanulaceae. It contains a single species, Peracarpa carnosa, a perennial which ranges from the Russian Far East to tropical Asia and New Guinea.

Cryptocodon is a genus of plants in the family Campanulaceae. There is only one known species, Cryptocodon monocephalus, endemic to the Pamir Mountains of Tajikistan.

Nesocodon is a monotypic genus of flowering plants within the family Campanulaceae. The sole species is Nesocodon mauritianus, formerly known as Wahlenbergia mauritiana, which is endemic to the island of Mauritius.

Heterocodon is a monotypic genus of plants in the bellflower family containing the single species Heterocodon rariflorum, which is known by the common names rareflower heterocodon and western pearlflower. It is native to western North America from British Columbia to California to Colorado, where it emerges during the spring in wet areas such as meadows. This is an annual herb producing a very thin, erect stem to 30 centimeters in maximum height. It branches few times if at all and is dark green to reddish in color. Leaves are occasional along the stem and are heart-shaped to rounded with a to

Pseudonemacladus is a genus of plants in the Campanulaceae. It contains only one known species, Pseudonemacladus oppositifolius, native to north-eastern Mexico (States of San Luis Potosí and Hidalgo).

Feeria is a genus of plants in the family Campanulaceae. There is only one known species, Feeria angustifolia, endemic to Morocco.

Rhigiophyllum is a genus of flowering plants belonging to the family Campanulaceae. It contains a single species, Rigiophyllum squarrosum, a subshrub or shrub endemic to the Cape Provinces of South Africa.