The pollen of Cruciferae, Scrophulariaceae, Liliaceae, Campanulaceae, Boraginaceae, and Resedaceae
is represented by 2.8%, 2.5%, 2.1%, 2.0%, 1.9%, and 1.5%, respectively.
The six genera of Resedaceae are small, with only Reseda containing more than 10 species (Bolle, 1936).
No crystals have been observed in wood of Resedaceae, although they are present in some other plant portions (Bolle, 1936).
In comparison to Gyrostemonaceae, Resedaceae are relatively nonsucculent.
In a similar way, simple pits on imperforate tracheary elements (= libriform fibers) have developed in some clades (Salvadoraceae, Tovariaceae, Borthwickiaceae, Resedaceae, Capparaceae, Cleomaceae, Brassicaceae); angiosperms have the genetic information to form fibers with simple pits (e.g.
Brassicales that represent particular types of xeromorphy and grow in dry habitats include Koeberliniaceae (deserts with summer rainfall), perennial Resedaceae (arid scrub), and Setchellanthus (subtropical desert scrub).
Presence of upright ray cells predominantly or exclusively is seen in Tropaeolum, some Resedaceae, and numerous insular Brassicaceae (Carlquist, 1971; Lens et al.
Interestingly, Brassicaceae with wood or leaf succulence (Bataceae, Caricaceae, Gyrostemonaceae, Moringaceae, Resedaceae) have minimal vesturing or none at all.
Tropaeolaceae have upright ray cells exclusively, as do some Resedaceae and some Gyrostemonaceae.