Brummitt (De Wild.) 1982 - Brummitt RK (1982) A Revision of Trichodesma sect. Friedrichsthalia (Fenzl) A.DC. Non Brand (Boraginaceae). Kew Bulletin 37(3): 429-450. doi: 10.2307/4110043.
There is no corrections for Trichodesma ambacense subsp. hockii yet.