Alambrillong-gubat is a fern. Stipes are tufted, erect or spreading, more or less covered with brown hairs, 5 to 20 centimeters long. Fronds are linear in outline, simply pinnate, 15 to 30 centimeters long; the leaflets, 1 to 2 centimeters long; the upper margin is rounded, and more or less cut. Rachis and both surfaces of the frond are villose, rooting at the apex; the sori are roundish on the edges of the lobes.
- Widely distributed in the Philippines, especially common in thickets.
- Also reported from Tropical Africa and from Asia to Polynesia.
- Study of various extracts of leaves showed TPC (total phenolic content) of 27.2 µg (methanolic), 21.2 µg (aqueous), and 16.7 µg (hexanic) of gallic equivalents per mL. TFCs (total flavonoid content) were 13.2 µg (methanolic), 11.6 µg (aqueous), and 10.0 µg (hexanic of rutin equivalents per mL. (see study below) (9)
- Considered antispasmodic, antiasthmatic.
- Studies have shown cytotoxic, antidiabetic, hypolipidemic, antioxidant, antimicrobial properties.
Leaves, aerial parts.
- Leaves are used in the preparation of "sirop-de-capillaire."
- In Bourbon, used to cure coughs and fevers.
- Externally, used as a remedy for skin diseases; internally, said to be useful for diabetes.
- Used to treat jaundice, scabies, constipation, abdominal pain.
- In Ayurveda, leaves used for diabetes.
- In India, fronds are used as substitute for Adiantum capillus-veneris.
- In Chamoli, India, fronds are used for skin disease, diabetes, cough and fever. (10)
• Antimicrobial: A study tested four important Adiantum species (A. capillus-veneris, A. peruvianum, A. venustum and A. caudatum) for antimicrobial activity against 5 gram positive, 6 gram negative, and 8 fungal strains. Maximum activity was exhibited by AV followed by ACV, AP and AC. The antimicrobial activity seemed related to the phenolic content. (1)
• Cytotoxicity: Extracts of 16 Bangladeshi plants were screened against human gastric, colon, and breast cancer lines. The methanolic extracts from Adiantum caudatum and B. lacera showed high cytotoxicity against all cell lines tested. (2)
• Anti-Diabetic Potential: Study evaluated the potential inhibitory activity of extracts and fractions of Adiantum caudatum Linn. and Celosia argentea Linn. on α-amylase and α-glucosidase enzymes. Fraction 2 of A. caudatum and fraction 4 of C. argentea showed highest α-amylase and α-glucosidase inhibitory potential. A. caudatum showed an IC50 of 0.241 and 0.211, respectively, comparable to acarbose (0.125 and 0.93 mg/ml). Other extracts and fractions showed lower activity. (5)
• Antibacterial / Fronds: Study evaluated fronds of Adiantum caudatum for antibacterial potential against bacterial species involved in skin diseases in humans. A methanol extract showed maximum level of activity towards Pseudomonas aeruginosa, a resistant strain towards amoxicillin and chloramphenicol. Flavonoid and phenol content in the methanol extract may be one of the reasons for its antibacterial activity. (6)
• Antioxidant / Antibacterial / Leaves: Study evaluated various extract of Adiantum caudatum leaves for phenolic content, flavonoid content, and antioxidant and antimicrobial potential. Antioxidant activities of the extracts in reducing power, FRAP, phosphomolybdate and ABTS assays were methanolic > aqueous > hexanic. In DPPH assay, the aqueous extract showed slightly higher antioxidant activity than the methanolic extract. In antibacterial testing against Bacillus subtilis, E. coli, and Pseudomonas aeruginosa, the aqueous extract was the most potent. (see constituents above) (8)
• Hypoglycemic / Hypolipidemic / Leaves: Study evaluated the hypoglycemic and antihyperlipidemic effect of ethanolic extract of A. caudatum whole plant in alloxan induced diabetic rats. Results showed a significant decrease in blood glucose level and significant decrease in serum total cholesterol and triglycerides. (9)