A revision of Davidsonia (Cunoniaceae)

Abstract

The genus Davidsonia(Cunoniaceae) is revised on the basis of available herbarium collections, field studies over itsgeographic range, fresh and preserved materials and previous accounts. Formerly considered amonotypic genus, Davidsonia is found to comprise three species; D. pruriens F. Muell., the typespecies, from north-eastern Queensland; D. jerseyana (F. Muell. ex F.M. Bailey) G. Harden & J.B.Williams, a known variety from north-eastern New South Wales here elevated to specific rank;and D. johnsonii J.B. Williams & G. Harden, a well-known but hitherto undescribed species fromnorth-eastern New South Wales and south-east Queensland. Each species is fully described andillustrated, and the lectotypification of D. pruriens is clarified