English Black Lombardy Poplar

Action ► Bark and balsam from leaf bud— used for cold. Bark— depurative. Leaf bud—antiseptic, anti- inflammatory.

Portulaca quadrifida Linn.

The bud exudate contains dimethyl-caffeic acid, which was found active against herpes simplex virus type 1.

A 50% ethanol extract of a mixture of flowers and buds showed 11% inhibition of enzymatic conversion of testosterone into 5 alpha-dihydrotesterone and 4-androstene-3,17-dione. The extract was partitioned between ethylac-etate and water and the resultant ethy-lacetate fraction contained the active compounds, pinobanksin, demethyl-quercetin and pinocembrin. It exhibited 15% inhibitory activity on the enzyme. Pinocembrin was the most potent, almost equal to estradiol, which was used as a control.

The bark of all Populus species contains, phenolic glycosides, salicin and populin (salicinbenzoate). Tannins are also present (5-9%).

Both salicin and populin cause elimination of uric acid. Salicin is antiperi-odic and is used like quinine in intermittent fever, also in coryza, rheumatism and neuralgia.

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