In Tanzania some Diospyros species are extensively used in local traditional medicine. The present study reports on the constituents of the root and stem barks of Diospyros verrucosa for which no chemical studies have been reported so far. The plant material was collected from Pugu Forest, Tanzania in December 1982 and authenticated. The plant material was subjected to usual extraction, separation and purification procedures. From the root bark were isolated diosindigo A, 7-methyljuglone, diosquinone, isodiospyrin, betulinic acid, and betulin. From the stem bark were isolated the same compounds with different contents. The compounds were identified by comparison of their spectra with literature data and direct comparison with authentic samples. The presence of diosindigo A is rare in the genus Diospyros and might be of chemotaxonomical importance. Diosquinone, a rare unsymmetrical dimeric naphthoquinone epoxide, was previously isolated from Diospyros tricolor. Thalictrum glandulosissimum (Finet et Gagnep.) W. T. Wang et S. H. Wang (Ranunculaceae) is an ancient perennial herb of China with a history of folk use in treating acute enteritis, dysentery, conjunctivitis, pyogenic dermatitis, and acute laryngopharyngitis. A phytochemical investigation of its alkaloids was undertaken due to no literature references and the genus' proclivity as a source of benzylisoquinoline-derived alkaloids. The rhizomes and roots were collected from Dali, Yunnan Province, China in summer 1984 and authenticated. The dried material was defatted with petroleum ether, extracted with ethanol, and fractionated into non-phenolic, phenolic non-quaternary, and quaternary alkaloid fractions. Chromatography of the quaternary alkaloid chloride fraction yielded quaternary protoberberine alkaloids (berberine, palmatine, coptisine, thalifendine, groenlandicine, columbamine, jatrorrhizine) and the quaternary aporphine alkaloid magnoflorine. This is the first isolation of alkaloids from T. glandulosissimum, with coptisine and groenlandicine first reported from the genus Thalictrum. Genista involucrata Spach (Fabaceae) is endemic to South and Central Anatolia, while Genista albida Willd. grows widely in Central and South Anatolia, rarely in North Anatolia. They are morphologically similar but differ in characters like terminal flowers and leaf hairiness. This study investigated their alkaloid content, with no prior literature reports. Total alkaloid contents of aerial parts were 0.13% (G. involucrata) and 0.15% (G. albida). Alkaloids were isolated by preparative TLC and identified via physical and spectral properties. (-)-Sparteine, (+)-17-oxosparteine, (+)-lupanine, 13-epimethoxylupanine, anagyrine, N-methylcytisine, cytisine, (+) calycotomine were isolated from G. involucrata, and (+)-17-oxosparteine, (+)-lupanine from G. albida.