Achillea clypeolata Sibth. & Sm. (original description)
Achillea holosericea Sibth. & Sm. (original description)
Achillea pubescens Sibth. & Sm. (original description)
Carthamus leucocaulos Sibth. & Sm. (original description)
Centaurea acicularis Sibth. & Sm. (original description)
Centaurea aegyptiaca Sibth. & Sm. (original description)
Centaurea collina Sibth. & Sm. (original description)
Centaurea crupina Sibth. & Sm. (original description)
Centaurea eryngioides Sibth. & Sm. (original description)
Conyza saxatilis Sibth. & Sm. (original description)
Echinops lanuginosus Lindl. (original description)
Echinops sphaerocephalus Sibth. & Sm. (original description)
Filago exigua Sibth. & Sm. accepted as Filago congesta Guss. ex DC. (original description)
Inula dentata Sibth. & Sm. (original description)
Lactuca leucophaea Sibth. (original description)