Corynabutilon Genus

Corynabutilon vitifolium
Corynabutilon vitifolium, by Steve Law from Henfield, England, CC BY-SA 2.0, via Wikimedia Commons

Corynabutilon is a small genus of flowering plants in the mallow family Malvaceae, order Malvales. GBIF's backbone taxonomy recognizes around a dozen names at species rank, most of them accepted, native to southern Chile and adjacent Argentina — a range corroborated by both the Wikipedia genus article (citing Plants of the World Online) and GBIF's own distribution records for the Chile Central, Chile South, and Argentina South regions. One well-documented member, Corynabutilon vitifolium, narrows this further to central and south-central Chile.

The genus was segregated from the closely allied genus Abutilon: its accepted authority is (K. Schum.) Kearney, published in Leaflets of Western Botany in 1949, when Thomas Henry Kearney raised Karl Moritz Schumann's earlier infrageneric grouping within Abutilon to full generic rank. Several Corynabutilon species still carry an Abutilon binomial as a synonym — Corynabutilon vitifolium, for instance, is synonymous with Abutilon vitifolium (Cav.) G.Don — reflecting this taxonomic history and the genus's continued close relationship to Abutilon.

Members of Corynabutilon are shrubs or small trees, per standard treatments of Malvaceae, bearing the mallow family's characteristic showy flowers. The best-known species in cultivation is Corynabutilon vitifolium, whose cultivars 'Tennant's White' and 'Veronica Tennant' have each received the Royal Horticultural Society's Award of Garden Merit, a mark of proven garden-worthiness. The genus also includes Corynabutilon suntense, listed as an accepted species in GBIF's backbone taxonomy, though it lacks its own detailed profile in the sources consulted.

Overall, Corynabutilon is a modest South American genus of mallow-family shrubs whose species limits and synonymy remain closely tied to the wider Abutilon complex from which it was split in 1949.

Distribution

Corynabutilon is native to southern Chile and adjacent Argentina; GBIF distribution records place it in the Chile Central, Chile South, and Argentina South regions. Corynabutilon vitifolium in particular is restricted to central and south-central Chile.

Cultivation

Corynabutilon vitifolium is the genus's main ornamental species, grown as a frost-tender garden shrub; its cultivars 'Tennant's White' and 'Veronica Tennant' have both received the Royal Horticultural Society's Award of Garden Merit.

Taxonomy Notes

Corynabutilon was raised to generic rank by Thomas Henry Kearney in 1949 (authority (K. Schum.) Kearney, Leafl. W. Bot. 5: 189), elevating an infrageneric group earlier recognized by Karl Schumann within Abutilon. Several of its species, including Corynabutilon vitifolium, retain an Abutilon binomial as a synonym, reflecting this split. GBIF places the genus in family Malvaceae, order Malvales.