Botany
Sambong-gala is a wooly, erect, branched herb, 0.5 to 1 meter in height, with stems bearing very conspicuous longitudinal wngs. Leaves are alternate, stalkless, lanceolate, 3 to 7 cm long, and toothed at the margins. Heads are small and borne in large numbers on the upper parts of the branches. Flowers are pink to purplish.
Distribution
In open waste places at low and medium altitudes in Lepanto and the Benguet Subprovincers, Cagayan, Ilocos Norte, Pangasinan, Bataan, and Batangas Provinces in Luzon, and in Mindoro.
Occurs in Burma to New Caledonia and Australia.
Constituents
Study of aerial parts yielded seven coumarins (5-methoxy-6,7-methylenedioxycoumarin, ayapin, puberulin, 5-methoxyscopoletin, 2',3'-dihydroxypuberulin, isofraxidin, and 5-(2',3'-dihydroxy-3'-methylbutyloxy)-6,7-methylenedioxycoumarin) and three flavonoids (luteolin, tomentin, and chrysosplenol C).
Parts used
Leaves
Uses
Folkloric
Decoction of leaves used for stimulant baths.
Studies
• Phytochemicals / Anti-Mycobacterial / Cytotoxicity: Studies on the chemical constituents of the aerial parts of Pterocaulon redolens isolated ten components: seven coumarins and three flavonoids. (See above: Constituents) Six coumarins and one flavonoid displayed mild activity against Mycobacterium tuberculosis. One flavonoid possessed moderate cytotoxicity against breast cancer and human small cell lung cancerr cell lines.
Availability
Wild-crafted.
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