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Family • Araceae
Dukalang
Schismatoglottis calyptrata (Roxb.) Zoll. & Moritzi
DROP TONGUE
Guang xi luo yan

Scientific names Common names
Calla calyptrata Roxb. Alipdayi
Homalomena calyptrata (Roxb.) Kunth Apusaw
Schismatoglottis calyptrata (Roxb.) Zoll. & Moritzi Dukalang (Bik., Bis.)
Zantedeschia calyptrata (Roxb.) K.Koch  
Accepted infraspecifics (6)  
Schismatoglottis calyptrata var. calyptrata  
Colocasia humilis Hassk.  
Colocasia humilis var. minor Hassk.  
Colocasia kotoensis Hayata  
Schismatoglottis calyptrata f. albidomaculata Hallier f.  
S. calyptrata var. albidomaculata (Hallier f.) Ridl.  
Schismatoglottis calyptrata var. concolor Hallier f.  
Schismatoglottis calyptrata f. dahlii (Engl.) Engl.  
Schismatoglottis calyptrata var. dahlii Engl.  
Schismatoglottis calyptrata f. glaucescens Hallier f.  
Schismatoglottis calyptrata var. maculata Hallier f.  
Schismatoglottis calyptrata f. olivacea Hallier f.  
Schismatoglottis calyptratoides Alderw.  
Schismatoglottis dorensis Gibbs  
Schismatoglottis kotensis (Hayata) Huang, Hsiao & Yeh  
Schismatoglottis calyptrata var. celebica Koord.  
Schismatoglottis calyptrata f. grandifolia Engl.  
Schismatoglottis calyptrata f. minor Engl.  
Schismatoglottis calyptrata f. multimarginata Alderw.  
Schismatoglottis calyptrata var. ornata Ridl. ex Engl.  
Schismatoglottis calyptrata is an accepted species. KEW: Plants of the World Online

Other vernacular names
BORNEO: Natu.
CHINESE: Guang xi luo yan.
PAPUA NEW GUINEA: Kukaruk.
SWEDISH: Spindelkalla.

Gen info
- Araceae is a family of monocotyledonous flowering plants in which flowers are borne on a type of inflorescence called a spadix. Also known as the arum family, members are colloquially known as aroids. The family contains 114 genera and about 3,750 known species. (4)
- Schismatoglottis is a genus of flowering plants in the family Araceae Genus members are similar in appearance and growth habit to Homalomena genus, primarily differing in that leaves of Schismatoglottis are not aromatic. As of November 20225, POWO accepts 97 species.
- Etymology: The genus name Schismatoglottis derives from Ancient Greek schismatos, meaning "separating," and glotta, meaning "tongue," referring to the deciduous upper part of the spathe. The specific epithet calyptrata derives from Latin, meaning "veiled" or "hooded." (3)

Botany
• Growth form: A stoloniferous, herbaceous aroid, growing up to 15 - 60 cm tall. Foliage: Leaves are heart-shaped to arrowhead-shaped, growing up to 7 - 35 cm long and 4 - 18 cm wide, occasionally variegated with sparse light green splotches. The leaves are petiolate and arranged in a rosette.Flowers: Inflorescence is a spadix, subtended by a pale green spathe. The spadix can reach up to 3.5 - 12 cm tall, with a lanceolate appendix (upper, infertile portion of the spadix), followed by reduced male flowers and reduced female flowers towards the base. The upper portion of the spathe withers and falls off during the maturation of the male flowers. Fruit: Infrutescence is a cluster of berries. (Flora & Fauna Web)

Distribution
- Native to the Philippines. (1) (2)
- In Alabat, Catanduanes, Cebu, Leyte, Palawan, Panay, Samar, Siargao; in Luzon:
Albay, Bataan, Batangas, Camarines Norte, Cavite, Laguna, Mountain Province, Quezon, Sorsogon; in Mindanao: Agusan del Sur, Bukidnon, Cotabato, Davao del Oro, Davoa del Sul, South Cototabo. (1)
- Also native to Bismarck Archipelago, China Southeast, Malaya, Maluku, New Guinea, Solomon Is., Sulawesi, Sumatera, Taiwan, Vanuatu. (2)

Properties
- Toxicity: Like many members of the Araceae family, Schismatoglottis calyptrata contains calcium oxalate raphides. The sap is a strong irritant, both to the skin and on ingestion, causing irritation of the mouth, tongue, and digestive tract. Caution includes keeping the plant out of reach of children and pets.

Parts used
Stems, leaves, sap.

Uses

Edibility
- Fruit is edible; used as substitute for gabi (Taro).
- Roots and leaves reportedly eaten. (Caution: see toxicity)
Folkloric
- No reported folkloric medicinal use in the Philippines.
- In East Sepik, Papua New Guinea, leaves used for treatment of skin sores. (6)
- In Chinese medicine, stems used as tonic for treatment of lumbago and arthralgia. (6)
-
In Borneo, the Dayak tribe use plant sap for treatment of external wounds.
Others

- Feed: In West Java, leaves used as fish feed.

Studies
• No studies found.

Availability
Wild-crafted.

November 2026

                                                 PHOTOS / ILLUSTRATIONS
IMAGE SOURCE: Schismatoglottis calyptrata leaves / by Obsidian Soul / CC0 / PUBLIC DOMAIN / Click on image or link to go to source page / Wikimedia Commons
OTHER IMAGE SOURCE: Schismatoglottis calyptrata leaves / by Kenraiz / CC BY-SA 3.0 / Image modified / Click on image or link to go to source page / Wikimedia Commons
IMAGE SOURCE: Schismatoglottis calyptrata var. calyprata / by galanhsnu / CC BY-NC 4.0 / Click on image or link to go to source page / gbif
 
 
 
 
 
 
 
 
IMAGE SOURCE: Kalak kambing (Finlaysonia obovata) / © Ron Yeo / Non-commercial use / Image modified / Click on image or link to go to source page / The Tide Chaser
OTHER IMAGE SOURCE: Finlaysonia obovata Leaf and splitting fruit / © uforest.org / Non-commercial use / Images modified / Click on images or link to go to source page / URBANFOREST
OTHER IMAGE SOURCE: Finlaysonia obovata splitting fruit and seeds / © Teo Siyang / Non-commercial use / Images modified / Click on images or link to go to source page / FloraofSingapore
 
IMAGE SOURCE: Hedyotis costata / Subject Database of China Plant <http://www.naturemuseum.net/album/ShowPhoto.aspx?photoid=2671c974-77ca-44f9-b304-0f16660a06f7> Helixcn
OTHER IMAGE SOURCE: /Gliricidia sepium (JacqBarcelona Kunth ex Walp. - quickstick GLSE2 / Steve Hurst @ USDA-NRCS PLANTS Database / USDA
OTHER IMAGE SOURCE: / File:Fruit of Syzygium samarangense / Wax apple / Plate from book / Flora de Filipinas / Francisco Manuel Blanco (OSA) / Public Domain / Wikimedia Commons
IMAGE SOURCE: / Photos (2) / Pterocaulon redolens (Willd.) F.-Vill. / © Collected by www.plant.ac.cn / ZHIWUTONG / CLICK ON IMAGE TO GO TO SOURCE PAGE
IMAGE SOURCE: / Line drawing / Pterocaulon redolens (Willd.) F.-Vill. / © Collected by www.plant.ac.cn / ZHIWUTONG / CLICK ON IMAGE TO GO TO SOURCE PAGE
IMAGE SOURCE:Phyllantaceae : Flueggea flexuosa / Leaf / Copyright © 2018 by P B Pelser & J F Barcelona (contact: pieter.pelser@canterbury.ac.nz) [ref. DOL131909] / Non-Commercial Use  / Image modified / Click on image or link to go to source page / Phytoimages.siu.edu
OTHER IMAGE SOURCE: / Flower close-up / dracobotanicus -- Wayne Dumbleton / Creative Commons Attribution / flickr / Click on graphic to see original image / flickr
OTHER IMAGE SOURCE: Mexican tea / Dysphania ambrosioides / © J Richard Abbott / Some rights reserved / NC BY-NC / Click on image or link to go to source page / iNaturalist
OTHER IMAGE SOURCE: / Illustration / Cissampelos pareira L. [5809-247450-161657] / Indian medicinal plants, vol. 1: t. 42 / PlantIllustrations.org
ebay
IMAGE SOURCE: Pterocaulon redolens (Willd.) F.-Vill. / © Collected by www.plant.ac.cn / ZHIWUTONG / CLICK ON IMAGE TO GO TO SOURCE PAGE / iNaturalist
flickr
iNaturalistUK
IMAGE SOURCE:   Erythrina fusca (Ngatae fisi) / Tau'olunga / CC BY-SA 3.0 / Click on image or link to go to source page / Wikipedia
Pacific Island Ecosystems at Risk (PIER)
Photos ©Godofredo Stuart / StuartXchange
Content © Godofredo Stuart / StuartXchange
Content / Photos © Godofredo Stuart / StuartXchange
Photos © Godofredo Stuart / StuartXchange
 

Additional Sources and Suggested Readings
(1)
Araceae: Schismatoglottis calyptrata
/ Pieter B Pelser / Co's Digital Flora Database
(2)
Schismatoglottis calyptrata / KEW: Plants of the World Online
(3)
Schismatoglottis calyptrata / NATIONAL PARKS: Flora & Fauna Web
(4)
Araceae: Wikipedia
(5)
Schismatoglottis / Wikipedia
(6)
An ethnobotanical survey of medicinal plants used in the East Sepik province of Papua New Guinea / Michael Koch, Dickson Andrew Kehop, Boniface Kinminja, Prem P Rai et al / J Ethnobiol Ethnomed., 2015; 11:79 / DOI: 10.1186/s13002-015-0065-8
(7)
Review: Traditional knowledge of the Dayak Tribe (Borneo) in the use of medicinal plants / Fatiha Ristya Za-Zahra, Neriza Laras Widya Sari, Ahmad Dwi Setyawan et al / BIODIVERSITAS, 2021; 22(10): pp 4633-4647 / ISSN: 1412-033X; eISSN: 2085-4722 / DOI: 10.13057/biodiv/d221057
(8)
SR: A novel feature of structural variegation in leaves of the tropical plant Schismatoglottis calyptrata / Hirokazu Tsukaya et al / Journal of Plant Research, 2004; 117(6) / DOI: 10.1007/s10265-004-0178-x

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PHOTOS / ILLUSTRATIONS

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 1,830 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, native or introduced, please email the info: scientific name (most helpful), local plant name (if known), any known folkloric medicinal use, and, if possible, a photo. Your help will be greatly appreciated.
α•(5)

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