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Family Polypodiaceae / Oleandraceae
Oleandra neriiformis Cav.

Lun ye tiao jue

Scientific names Common names
Aspidium bantamense Blume Kaliskis-ahas (Tag.)
Aspidium micranthum Blume Lunas (Tag.)
Aspidium neriiforme (Cav.) Sw. Snake skin fern (Engl.)
Aspidium phyllarthron Kunze Stilt fern (Engl.)
Aspidium salaccense Blume  
Blechnum colubrinum Blanco  
Oleandra archboldii Copel.  
Oleandra bantamensis (Blume) Kunze  
Oleandra christophersenii C.Chr.  
Oleandra ciliata Klotzsch  
Oleandra cllemensiae Copel.  
Oleandra colubrina (Blanco) Copel.  
Oleandra colubrina var. membranacea Copel.  
Oleandra colubrina var. nitida Copel.  
Oleandra cuspidata Baker  
Oleandra herrei Copel.  
Oleandra hirta Brack.  
Oleandra hirtella Miq.  
Oleandra micrantha (Blume) Kunze  
Oleandra mollis C.Presl  
Oleandra neriiformis Cav.  
Oleandra neriiformis var. hirta (Brack.) Baker  
Oleandra nitida (Copel.) Copel.  
Oleandra oblanceolata Copel.  
Oleandra parksii Copel.  
Oleandra phyllarthron (Kunze) C.Presl  
Oleandra platybasis Copel.  
Oleandra samoensis Gand.  
Oleandra subdimorpha Copel.  
Ophiopteris verticillata Reinw.  
Oleandra neriiformis Cav. is an accepted species. KEW: Plants of the World Online

Other vernacular names
CHINA: Lun ye tiao ju.
INDONESIA: Paku areuy, Paku korani, Paku sake.
THAILAND: Nakkharat, Phaya ngu, Nakho.

Gen info
- The taxonomy of the genus Oleandra is confused and various authors have stressed worldwide revision. (2)
- Some compilations place the plant in the family Oleandraceae, others in Polypodiaceae. There is also a confusing clutter in synonyms.

- Kaliskis-ahas is a terrestial and epiphytic fern, scandent and brushy in habit. Rhizomes are woody, clothed with dense adpressed bases of scales which sometimes grow to several meters long and are branched. Scales are arranged in a way resembling somewhat those of snakes; hence the common name, kaliskis-ahas. Stipes are clustered. Fronds are single and entire, 10 to 35 centimeters long and 1.5 to 4 centimeters wide, with acuminate or caudate apex, and not very hairy. Sori are arranged in a row on each side of the costa; the insidium is reniform and persistent.

- A terrestrial thicket-forming fern, up to 2 m tall, with a branching shrublike habit, easily mistaken for a flowering plant, sometimes climbing-epiphytic. Rhizome stiff, erect or suberect, up to 10 mm in diameter, acting as an aerial stem, densely covered with scales; scales appressed, imbricating, the peltate basal part 1-1.5 mm wide, dark brown to black, narrowed abruptly into the up to 3.5 mm long apical part which is ciliate when young; aerial stem branched, straight, 1-1.5(-2) m tall, with few or no rhizophores, the leaves close together in pseudowhorls of 4-14, the whorls separated by 2-10 cm long internodes. Leaves simple, clustered, more or less coriaceous, on 2-5 mm long phyllopodia borne on all sides of the aerial stem; petiole 0.5-10 mm long, scaly; lamina oblanceolate, up to 40 cm × 3.5(-7.5) cm but often narrower, base attenuate, margins entire, apex caudate-acuminate, midrib scaly when young, glabrous or pilose; veins close together, simple or once forked, straight, at a broad angle to the midrib. Sori in one irregular row on each side of the midrib, usually 0-3 mm from the midrib; indusium reniform, up to 2 mm wide. Spores monolete, ellipsoid to spheroid, with irregularly toothed wings. (2)

- Native to the Philippines.
- On tree tops and terrestially, in the sun, at middle and higher altitudes, throughout the Philippines.
- Also native to Bismarck Archipelago, Borneo, Cambodia, Fiji, Jawa, Lesser Sunda Is., Malaya, Maluku, New Guinea, Queensland, Samoa, Santa Cruz Is., Society Is., Solomon Is., Sulawesi, Sumatera, Thailand, Vanuatu, Vietnam. (1)

- Several compounds have been isolated from O. neriiformis : filicene (C30H50), n-octacosanol lignocerate, the 4-desmethyl sterols campestersol, stigmasterol, β-sitosterol and a trace of cholesterol, the 4a-methyl sterols cycloeucalenol, citrostadienol and traces of 24-methylen lophenol, the dimethyl sterols cycloartenol and 24-methylene cycloartenol, the triterpene alcohol nerifoliol, neriifoloxide, a triterpene epoxide (C30H50O) and the triterpene 29-ethoxyhopane (C32H56O). Histochemical tests in the Philippines showed abundant amygdalin and saponin in rhizomes and pinnae, and formic and tartaric acid in aerial stems. (2)

- Emmenagogue.

Parts used
Stipes, rhizomes.



- In the Philippines, decoction of stipes considered an effective emmenagogue and alleviating difficult menstruation.
- Decoction of rhizome used for treatment of venomous snake bites.
(3) (4)

- No studies found.


Updated  October 2023 / November 2012

                                                 PHOTOS / ILLUSTRATIONS
IMAGE SOURCE: Oleandracea : Oleandra neriiformis / Living plant / Copyright © 2022 Wendy A Mustaqim (contact: pieter.pelser@canterbury.ac.nz) [ref. DOL205699] / Non-Commercial Use / click on image or link to go to source page / Phytoimages.siu.edu
OTHER IMAGE SOURCE:  Oleandracea : Oleandra neriiformis / Lower (abaxial) lamina showing sori / Copyright © 2013 Julie F Barcelona (contact: pieter.pelser@canterbury.ac.nz) [ref. DOL74928] / Non-Commercial Use / click on image or link to go to source page / Phytoimages.siu.edu
OTHER IMAGE SOURCE:  Oleandra neriiformis / Copyright © Michael Sundae / / Non-Commercial Use / click on image or link to go to source page / FERNS and LYCOPHYTES of the WORLD

Additional Sources and Suggested Readings
Oleandra neriiformis Cav. / KEW: Plants of the World Online
Oleandra neriiformis (PROSEA) / JJ Afriastini / Pl@ntUse
Traditional pteridophytic herbal medicines and reproductive health disorders in women- A Review / Dolan Das, Biplab Patra / The Journal of Phytopharmacology, 2021; 10(6): pp 490-495  / ISSN: 2320-480X

Kaliskis-ahas / William H Brown, AF Fischer, LM Guerrero et al / Minor products of Philippines forests , 1(3)

DOI: It is not uncommon for links on studies/sources to change. Copying and pasting the information on the search window or using the DOI (if available) will often redirect to the new link page. (Citing and Using a (DOI) Digital Object Identifier)

                                                            List of Understudied Philippine Medicinal Plants
New plant names needed
The compilation now numbers over 1,300 medicinal plants. While I believe there are hundreds more that can be added to the collection, they are becoming more difficult to find. If you have a plant to suggest for inclusion, please email the info: local plant name (if known), any known folkloric medicinal use, scientific name (most helpful), and, when possible, a photo. Your help will be greatly appreciated.

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