''Dryopteris crassirhizoma'' is a fern species in the wood fern family Dryopteridaceae. This semi-

evergreen In botany, an evergreen is a plant which has foliage that remains green and functional through more than one growing season. This also pertains to plants that retain their foliage only in warm climates, and contrasts with deciduous plants, whic ...

fern grows to tall and broad, with narrowly-divided fronds growing in a vase-like shape from a central crown, which is brown in colour. It has gained the

Royal Horticultural Society The Royal Horticultural Society (RHS), founded in 1804 as the Horticultural Society of London, is the UK's leading gardening charity. The RHS promotes horticulture through its five gardens at Wisley (Surrey), Hyde Hall (Essex), Harlow Carr (Nor ...

Award of Garden Merit The Award of Garden Merit (AGM) is a long-established annual award for plants by the British Royal Horticultural Society (RHS). It is based on assessment of the plants' performance under UK growing conditions. History The Award of Garden Merit ...

. The acyl

phloroglucinol Phloroglucinol is an organic compound with the formula C6H3(OH)3. It is a colorless solid. It is used in the synthesis of pharmaceuticals and explosives. Phloroglucinol is one of three isomeric benzenetriols. The other two isomers are hydroxyqu ...

s (

flavaspidic acid Flavaspidic acid AB is a polyphenol that is a phloroglucinol derivative isolated from the rhizomes of Dryopteris Crassirhizoma and has been shown to exhibit radical scavenging and antibacterial activity. It has a role as a metabolite and an antibact ...

s) isolated from ''D. crassirhizoma'' show ''

in vitro ''In vitro'' (meaning in glass, or ''in the glass'') studies are performed with microorganisms, cells, or biological molecules outside their normal biological context. Colloquially called " test-tube experiments", these studies in biology a ...

antibacterial An antibiotic is a type of antimicrobial substance active against bacteria. It is the most important type of antibacterial agent for fighting bacterial infections, and antibiotic medications are widely used in the treatment and prevention ...

and fatty acid synthase inhibitory activity. Also, the constituents sutchuenoside A and

kaempferitrin Kaempferitrin is a chemical compound. It can be isolated from the leaves of '' Hedyotis verticillata'' and from '' Onychium japonicum''. Kaempferitrin is the 3,7-dirhamnoside Rhamnose (Rha, Rham) is a naturally occurring deoxy sugar. It can be c ...

have ''

in vivo Studies that are ''in vivo'' (Latin for "within the living"; often not italicized in English) are those in which the effects of various biological entities are tested on whole, living organisms or cells, usually animals, including humans, and p ...

antiparasitic Antiparasitics are a class of medications which are indicated for the treatment of parasitic diseases, such as those caused by helminths, amoeba, ectoparasites, parasitic fungi, and protozoa, among others. Antiparasitics target the parasitic age ...

activity. Dryopteris crassirhizoma 2.JPG

References

crassirhizoma Plants described in 1920 Taxa named by Takenoshin Nakai {{Dryopteridaceae-stub