Pasau-na-hapai is an erect, branched, smooth annual, 20 to 60 centimeters high, with
green or purplish, 3- or 4-angled or winged stems, and spreading
3-angled branches. Leaves are narrowly elliptic-lanceolate or oblong lanceolate,
4 to 10 centimeters long. Flowers occur singly and without stalk in the axils of leaves. Calyx-tube is slender and about 8 millimeters long, with 4 green,
lanceolate, nearly 4 millimeter long calyx-lobes. Petals are 4, yellow, narrowly
oblong-elliptic, and as long as the sepals. Stamens are 8, ovary
4-celled, ovules many in several axile rows in each cell. Fruits are capsules, green or purplish, about 3 centimeters long,
and 1 to 2 millimeters in diameter. Seeds sometimes faintly visible through
- Throughout the
Philippines, in open, damp places, old rice paddies, margins
of streams, etc. at low and medium altitudes.
- Probably of American origin.
- Now pantropic.
- Phytochemical studies yielded vitexin, isovitexin, orientin and isoorientin.
- Considered astringent, anthelmintic, carminative and diuretic.
- Used for cold-fever, swelling pain in the throat, inflammation of the
- Used for enteritis-diarrhea, eczema, and furuncle.
- The decoction
of dried materials used as gargle for mouth ulcer.
Pounded fresh material may be
applied as poultice to area afflicted by eczema.
- In Bangladesh and India, decoction used for diarrhea and dysentery, flatulence, leucorrhea and hemoptysis. Leaves used for poulticing in orchitis and neck gland enlargement. Decoction used as vermifuge and purgative.
- Infusion of root is swallowed by the Malays for syphilis.
- In Celebes, infusion of roots used for poulticing pimples.
- Dye: In the Philippines, plant used in making a black dye.
• Anti-tumor / Antibacterial: Study isolated an alkaloidal constituent, piperine which showed antitumor and antibacterial activity. Its inhibitory effect on crown-gall tumor suggests potential for exploitation of the plant species for cancer prevention and treatment. On antibacterial study, it showed good activity against Shigella dysenteriae, S aureus and B subtilis. (1)
• Antidiarrheal: Study of extract of Ludwigia hyssopifolia reduced gastrointestinal motility by 53.8% at 100 mg KBW with no inhibition at 50 mg KBW. (2)
• Analgesic: Study evaluated the analgesic activity of a methanolic extract of Jussiaea hyssopifolia plant in Swiss albino mice using a hot plate method. Results showed significant analgesic effect compared to standard drug diclofenac. (4)
• Anhelmintic: Study evaluated the methanolic extract of the entire plant of Jussiaea hyssopifolia for anthelmintic activity against earthworm Pheretima posthuma. Results showed significant anthelmintic effect in comparison to standard drug. (5)