Artemisia inculta var. laxiflora (Boiss.) Tackholm (original description)
Artemisia judaica var. sinaitica Tackholm (original description)
Atractylis boulosii Tackholm (original description)
Atractylis carduus var. angustifolia Tackholm & Boulos (original description)
Atractylis carduus var. glabrescens (Boiss.) accepted as Atractylis carduus (Forssk.) C.Chr. (original description)
Atractylis carduus var. latifolia Tackholm & Boulos (original description)
Atractylis carduus var. marmarica Tackholm & Boulos (original description)
Crepis aegyptiaca (Schweinf.) Täckh. & Boulos accepted as Heteroderis pusilla (Boiss.) Boiss. (original description)
Crepis radicata var. arabica (Boiss. & Reut.) Tackholm & Boulos (original description)
Hedypnois cretica subsp. ramosa Tackholm & Boulos (original description)
Hedypnois cretica subsp. rhagadioloides (L.) Tackholm & Boulos (original description)