Anatolnical features of stein internodes and the leavesrnof Vernonia galamensis (Cass) Less. and Guizotia abyssinicarn(L.:f.) Casso have been studied. Most of the anatomicalrncharacters of the t,ro species are similar and hence arerndescribed together; the stems of both species possessrnuniseriate epidermic bearing uniseriate multicellular nonglandularrnhairs; phloem fibers develop in a discrete mannerrnand do not form 0. continuous cylinder around the stern. Atrnthe mid rib region, mature leaves of both species containrnthree sets of vascular bundles. The thickening on the lateralrnvessel lfalls of both species is annular at an earlier ontogeneticrnstage, but scalariform and pitted vessel elements lfithrnsimple perforation plates lfere observed at later stages ofrndevelopment.rnVessel dimensions and aggregation of vessels of bothrnspeciesj however, sholfed definite correlation lfith thernhabitat climatic oondition that is prevalent in the naturalrnarea of distribution of the tlfO species. In this respectrnQ. abyssinica is characterized by lfider and longer vesselrnelements as compered tv y.. galamensis "'hieh has shorter,rnnarrower and denser vessel elements. Tangential longitudinalrnsection through the vascular bundle of y. galamansisrnshowed considerable development of vascular rays. Bothrnuniserinte as well as lnultiseriate rays are observed. Collenchyma develops in the stems of both speciesrnnext to the epidormis. In Y... galamensis there are 3-llrncell layers Vlhilc in Q. abyssinica there are only 2 layersrnof collenchyma. Considerable development of aerenchyma inrnthe stem of Q. abyssinica is observed indicating its usuallyrnmoist natural habitat Vlhich probably induces development ofrnlacunae. The pith of Q. abyssinica starts to disint"egrate atrnearlier stage during the development of the plant. Ecologicalrnsignificance of hollo;; pith as it occurs in Q. abyssinicarnis discussed along with other anatomical characters.