| Abstract: |
This thesis comprises the macro— and microinorpho— logical study as well as the phytochemical investigation of Launaca mucronaba, C Porsak) tribe ‘7ichoriae, fanily Qompositae, a common wild plant in Egypt where it is known by the Arabic name Morraer. In view of the pz’es-. once of mediina1ly important constituebs in plants of bribe cichoraca, their use in folk medicine and as the literature survey appears to lack any information about Launaea muc’onata (For’ssk). Accordingly, it was deemed of interest to investigate Launaea muoronata C Forssk) aimirg to isolate, characteriso and identify, its chemical constituents, as well as the study of its macro— and mioromorphological characters to ease its 4entifi. cation in the entire or powdered form.I Macroand inicromorphological study:- -a-— _w4— Macromorphology.The leaf: Simple, exstipulate, sessile, green and glabrous Xamina of radical leaves; lanceolate , pinnati — sect with. acute apex, symmetric base and reticulate venation while that of upper cauline leaves being fan—shaped, with amplexicaul base andpainwtely reticulate venation.be Stem. t rect, cylindcica1 showing monopodial , alternate branchi.ng, branches being yellowish—green. in colour with smooth glabrous surf ace.The Inflorescence: Flowering heads; 1omogenous, formed of 60 to 120 ray florets arranged on flat receptacle and surrounded by an involucre of 17 to 24 bracts arr-. anged in 2 to 4 alternate whorls.The Receptac1e aolid, flat, showing numerous minute depressions corresponding to the seats of the florets and distituted of paleae.
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