Adenostemma hirsutum var. bullatum J.Kost. (original description)
Adenostemma hirsutum var. typicum J.Kost. accepted as Adenostemma hirsutum var. hirsutum (original description)
Adenostemma lavenia var. subsessilifolium J.Kost. (original description)
Centratherum frutescens var. javanicum (Miq.) J.Kost. accepted as Phyllocephalum frutescens Blume (original description)
Centratherum frutescens var. papandaianense J.Kost. accepted as Phyllocephalum frutescens Blume (original description)
Centratherum frutescens var. typicum J.Kost. accepted as Phyllocephalum frutescens Blume (original description)
Elephantopus scaber var. angustatus J.Kost. (original description)
Elephantopus scaber var. serratus J.Kost. (original description)
Mikania cordata f. dentata J.Kost. (original description)
Mikania cordata f. typica J.Kost. accepted as Mikania cordata f. cordata (original description)
Mikania cordata f. undulata J.Kost. (original description)
Mikania cordata f. villosa J.Kost. (original description)
Vernonia arborea var. celebica (Blume) J.Kost. accepted as Strobocalyx arborea Sch.Bip. (original description)
Vernonia arborea var. conferta (DC.) J.Kost. (original description)
Vernonia arborea var. kenepaiensis J.Kost. (original description)
Vernonia arborea var. mollissima (Ridl.) J.Kost. (original description)
Vernonia arborea var. papanensis J.Kost. (original description)
Vernonia arborea var. pilifera J.Kost. (original description)
Vernonia arborea var. simalurensis J.Kost. (original description)
Vernonia arborea var. sumatrensis J.Kost. (original description)
Vernonia arborea var. typica J.Kost. accepted as Vernonia arborea var. arborea (original description)
Vernonia cinerea var. lanata J.Kost. (original description)
Vernonia cinerea var. linifolia (Blume) J.Kost. (original description)
Vernonia cinerea var. obtusa J.Kost. (original description)
Vernonia cinerea var. typica J.Kost. accepted as Vernonia cinerea var. cinerea (L.) Less. (original description)
Vernonia coerulea var. glabrata J.Kost. (original description)
Vernonia coerulea var. typica J.Kost. accepted as Vernonia coerulea var. coerulea (original description)
Vernonia cymosa var. eupatorioides (Blume) J.Kost. (original description)
Vernonia cymosa var. incana J.Kost. (original description)
Vernonia cymosa var. teysmanniana (Miq.) J.Kost. accepted as Vernonia teysmanniana Miq. (original description)
Vernonia cymosa var. typica J.Kost. accepted as Vernonia cymosa var. cymosa (original description)
Vernonia patula var. multiflora J.Kost. (original description)
Vernonia patula var. pubescens (Blume) J.Kost. accepted as Vernonia patula (Dryand.) Merr. accepted as Cyanthillium patulum (Ait.) H.Rob. (original description)
Vernonia patula var. typica J.Kost. accepted as Vernonia patula var. patula (original description)
Vernonia sect. Claotrachelus (Zoll.) J.Kost. (original description)
Vernonia sect. Congestae J.Kost. (original description)