Monotypic Rutaceae genera

Ptaeroxylon obliquum is the botanical name for the sneezewood tree. It is native to Southern Africa, including South Africa, Zimbabwe, and Mozambique. It is the only species in the genus Ptaeroxylon.

thumb|Habit in Kings Park, Perth

Burkillanthus is a monotypic genus of flowering plants in the citrus family, Rutaceae, containing the single species Burkillanthus malaccensis. It is native to Sumatra, the Malay Peninsula and Borneo. Its common name is Malay ghostlime.

Halfordia is a genus of plants in the family Rutaceae containing the single species Halfordia kendack commonly known as kerosenewood, southern ghittoe or saffronheart, is a rainforest plant that is native to eastern Australia, New Guinea and New Caledonia. It is a shrub or tree with elliptical to egg-shaped leaves with the narrower end towards the base, panicles of white, greenish white or yellowish flowers and purple to bluish black, spherical to oval fruit.

thumb|Fruit thumb|Foliage in Mount Coot-tha Botanic Gardens

Swinglea is a monotypic genus of flowering plants belonging to the family Rutaceae. It only contains a single species, Swinglea glutinosa.

Boenninghausenia is a monotypic genus of flowering plants in the family Rutaceae. The sole species is Boenninghausenia albiflora, which occurs in Bhutan, Nepal, Pakistan, Kashmir, India, Indonesia, Philippines, Myanmar, Thailand, Laos, North Vietnam, China and Japan.

Pitavia is a genus of plants in the family Rutaceae. It contains the following species (but this list may be incomplete): Pitavia punctata (Ruiz & Pav.) Molina

Psilopeganum is a genus of flowering plants of the family Rutaceae.

Dinosperma is a genus of plant containing the single species Dinosperma erythrococcum, commonly known as tingletongue, clubwood or nutmeg, and is endemic to north-eastern Australia. It is a tree usually with trifoliate leaves arranged in opposite pairs, the leaflets lance-shaped to oblong, and panicles of small white flowers, later bright orange to red, slightly fleshy follicles containing shiny, bluish black seeds.

Merrillia is a monotypic genus of flowering plants in the citrus family, Rutaceae, containing the single species Merrillia caloxylon. Its English language common names include flowering merrillia, katinga, and Malay lemon. In Malaysia it is called ketenggah and kemuning gajah. The species is native to Malaysia, Thailand, and Sumatra in Indonesia.

Cneoridium is a monotypic genus in the citrus family which contains the single species Cneoridium dumosum, commonly known as bushrue or coast spice bush. As a perennial, evergreen shrub, Cneoridium is native to the coast of southern California and Baja California, thriving in hot, dry conditions. This plant is characterized by a distinctive citrusy aroma and small, white flowers that appear from winter to spring. The flowers eventually become round berries that resemble a miniature version of the common citrus.