Cultivar origin

Tōkai region, Japan

'Mikawa yatsubusa' is a dwarf Japanese maple of Japanese origin. Johnson's Nursery places its discovery in the Tōkai region, associated with the former province of Mikawa. Leafland similarly reports that it was found in the 1970s and credits J. D. Vertrees of Maplewood Nursery, Oregon, with first growing it in the United States. That American cultivation credit should not be treated as proof that Vertrees selected the original Japanese plant or made its first worldwide introduction. The reviewed accounts do not identify the original finder or establish an exact selection or introduction year. They also do not document named parents or a controlled cross. Its defining features are exceptionally short internodes, densely overlapping green leaves, and sculptural branching that gives an untrained plant a bonsai-like appearance.

Patent & Royalty Status

United States: USPP29301P3, covering CHACER01, describes Mikawa Yatsubusa as an unpatented commercial variety. This historical statement does not establish current worldwide patent status.