Trichomes’ Micromorphology and Their Evolution in Selected Species of Causonis (Vitaceae)

The Vitaceae genus Causonis is found in tropical to temperate climates from Asia Australia, including the Pacific Islands. Rafinesque established 1930; however, Süssenguth classified it under Cayratia as a sect. Discypharia 1953. was resurrected 2013 using morphological and genetic evidence. We herein provided insight into diversity of trichomes’ micromorphology selected species this recently reinstated for taxonomical implication. Simple trichomes, representing non-glandular unbranched are only Causonis. Trichomes vary straight, curved, hooked, appressed, pilose, villous different parts like branchlets, abaxial leaf surface, adaxial surface species. They also same plant young stage mature stage. Most pubescent when young, but few become nearly glabrous they mature. Significant variations can be observed length between Principal component analysis (PCA), based on micromorphological traits, carried out delimitation. In Mesquite, ancestral character state reconstruction used examine evolutionary trends trichomes three surfaces. sparsely branchlets both surfaces were and, surfaces, hairs derived genus. identification greatly aided by morphology. Therefore, similar studies should conducted other genera reveal variety family.