Carlina sitiensis Rech.f. (original description)
Carthamus gracillimus Rech.f. accepted as Carthamus tenuis subsp. gracillimus (Rech.f.) Hanelt (original description)
Centaurea tragacanthoides Rech.f. accepted as Centaurea spinosa L. (original description)
Centaurea xylobasis Rech.f. (original description)
Cineraria vallispacis Range (original description)
Cirsium interpositum Petr. (original description)
Cirsium mongolicum Petr. (original description)
Cirsium wilhelmii Petr. (original description)
Cirsium xenogena Petr. (original description)
Othonna albicaulis Range (original description)