Article

Macro- and micromorphological characters of the S. Yugoslav endemie, Bornmuellera dieckii, were analysed. The medifixed, tuberculate trichomes occur in two types, being thickwalled and sessile on leaves but slender and stalked on the stem. Trichome morphology is compared with that in allied genera. The dimensions of leaves and siliculae are much more variable than was originally described, and trichomes are scattered over both leaf surfaces, not only abaxially. In a chemical survey of fatty acids from C14 to C22 (saturatedand unsaturated) were found in seeds, and long-chain n-alkanes (C29 and C31) were identified in the waxes covering stem and leaves.