Chinotto Citrus, pot D.15 cm Citrus myrtifolia, the myrtle-leaved orange tree, is a species of Citrus with foliage similar to that of the common myrtle. The fruit of the tree resemble small oranges. They are sour or bitter and are commonly called by their Italian name, chinotto. Slow growing, densely foliated, highly decorative tree. Citrus are subtropical or warm-temperate plants adapted to growing in sandy alluvial soils along floodplains. Soils can be infertile sands, but citrus grow best in medium-fertile, well-drained soils of neutral to slightly-acid pH.