Calendula microcephala Kral. ex Rchb. accepted as Calendula suffruticosa Vahl (original description)
Calendula sublanata Rchb.f. accepted as Calendula arvensis (Vaill.) L. (original description)
Carduus acuminatus Gaud. ex Rchb. accepted as Carduus acanthoides L. (original description)
Centaurea augustana Rchb.f. accepted as Centaurea pestalotii De Not. ex Ces. (original description)
Centaurea austriaca Rchb. accepted as Centaurea nigra L. (original description)
Centaurea brachtii Rchb.f. accepted as Centaurea pestalotii De Not. ex Ces. (original description)
Centaurea chaubardii Rchb.f. accepted as Centaurea stoebe L. (original description)
Centaurea cylindrocarpa Rchb.f. accepted as Centaurea cuneifolia Sibth. & Sm. (original description)
Centaurea heerffelii Rchb.f. accepted as Centaurea kotschyana Heuff. (original description)
Centaurea petteri Rchb.f. accepted as Centaurea glaberrima subsp. divergens (Vis.) Hayek (original description)
Centaurea praetoria Rchb.f. accepted as Centaurea vallesiaca (DC.) Jord. (original description)
Centaurea reuteri Rchb.f. accepted as Centaurea leucophaea subsp. reuteri (Rchb.f.) Dostál (original description)
Centaurea vallesiaca Rchb.f. (original description)
Cirsium drijeri Rchb.f. accepted as Cirsium vulgare (Savi) Ten. (original description)
Cirsium morisianum Rchb.f. (original description)
Lappa intermedia Rchb.f. (original description)
Serratula heleniifolia Sch.Bip. ex Rchb. (original description)