Leaf architectural studies have been made in 22 genera and 25 species belonging to 8 tribes of the Asteraceae. Leaves are oblong, ovate or elliptic. Base acute, obtuse or lobate. Apex acute, acuminate, attenuate or !abate. Margin is lobed, wavy or serrate. Average size of the fully mature foliage leaves vary from species to species. Major venation pattern conforms to pinnate-craspedodromous, pinnate-camptodromous with festooned brochidodro mous secondaries, acrodromous and palinactinodromous types. Marginal ultimate venation is either incomplete, looped or fimbriate. Number of primary venis vary according to the type of venation pattern. The number of secondaries on one side of the primary veins vary from species to species and even within the same species. Highest vein order is noticed upto 5°. Areoles are formed by tertiary and higher order veins. Bundle sheath is noticed in some species. Loop formation, isolated free vein endings and isolated tracheids are observed. Tracheids are uni, bi-or multi-seriate. Secretory cavities are observed at the margins of Tagetes patula. Qualitative feataures and numberical data on leaf architecture are compiled.