Family • Camelinaceae - Rhoeo discolor (L'Her.) Hance - MOSES-IN-THE-CRADLE
|Ephemerum bicolor Moench|
|Rhoeo spathacea (Sw.) Stearn|
|Rhoeo discolor (L’Her.) Hance.|
|Tradescantia discolor L’Her.|
|Tradescantia spathacea Sw.|
|Zi bei wan nian qing (Chin.)|
|Boat lily (Engl.)|
|Oyster plant (Engl.)|
Other vernacular names
|KHMER: Toem pradl lk’|
|SPANISH: Canoa Di San Pedro, Señoritas Embarcadas.|
|VIETNAMESE: Cay le ban, Lao ban, So huyet.|
– Tradescantia is named after John Tradescant senior, gardener to Charles I. He collected the first tradescantia from Virginia in the USA. Spathacea refers to the spatula-like leaves. Its common names are Moses-in-the-cradle, Oyster Plant and Boat Lily.
– Moses in a Cradle: The small white three-petaled flowers (Moses) arise from within the boat-shaped purple bracts (the cradle) nestled between the leaf axils.
Additional Sources and Suggested Readings
(1) Antigenotoxic, antimutagenic and ROS scavenging activities of a Rhoeo discolor ethanolic crude extract / GONZALEZ-AVILA M. (1) ; ARRIAGA-ALBA M. et al
(2) Antimicrobial Properties and Phytochemical Constituents of Rheo discolor Hance./ Ethnobotanical Leaflets 12: 841-45. 2008.
(3) Tradescantia spathacea / Flowers & Plants / Interflora
(4) In vitro effects of Thai medicinal plants on human lymphocyte activity / Busarawan Sriwanthana, Weena Treesangsri, Bongkod Boriboontrakul, Somchit Niumsakul, and Pranee Chavalittumrong / Songklanakarin J. Sci. Technol. Vol.29 (Suppl. 1), March 2007 : Thai Herbs II
(5) Rhoeo discolor (L’Hér.) Hance is a synonym of Tradescantia spathacea Sw. /The Plant List
(6) Medicinal Knowledge in Cuba – domestic prescriptions using front and backyard biodiversity / Madaleno, Isabel Maria / Tropentag 2009 University of Hamburg, October 6-8, 2009 / Conference on International Research on Food Security, Natural Resource Management and Rural Development
Bangka-bangkaan is a stout perennial herbaceous, somewhat fleshy plant, 0.5 meters in height or less, the stem thick and unbranched. Leaves are lanceolate, acuminate, 40 to 60 centimeters long, 4 to 6 centimeters wide, fleshy, the upper surface dark green, the lower purple.
Flowers are numerous in each inflorescence, fascicled, white, about 1 centimeter in diameter. Inflorescence, axillary, short, peduncled, the flowers surrounded by 2 large, imbricate, laterally compressed, distichous, 3 to 4 centimeters long purplish bracts.
• Phytochemical studies yielded alkaloids, flavonoids, steroids, saponins, cardiac glycosides, terpenoids, tannin and phenolic compounds and oil.
• Decongestant, expectorant, blood refrigerant, antidysenteric.
• Reported anti-inflammatory, anticancer, insecticidal, antimicrobial, antifertility properties.
Collect the whole year round. Sun-dry.
· Used for cough, colds, hemoptysis, whooping cough, nose bleed.
· Bacillary dysentery, blood in the stool.
· Used for lymphatic tuberculosis.
· Dosage: use 30 to 60 gms fresh material, 15 to 84 gms dried material or 20 to 30 pieces dried material in decoction.
· In Singapore, sold in markets as both ornamental and medicinal: Boiled in water, it is believed to have cooling properties.
· In Thai medicine, used for fever, cough and bronchitis.
· In Cuba, frictions and cataplasms used to treat wounds. In the Caribbean, poultice of leaves used for asthma.
The plant sap is considered poisonous. Contact may cause stinging and itching of the skin and eyes. Ingestion may cause irritation of the lips, mouth, throat and abdominal pain.
• Anti-tumor / Chemoprevention: Aqueous crude extract of Rhoeo discolor decreases the formation of liver preneoplastic foci in rats – In Mexico, Rhoeo discolor has been used to treat cancer. A study was done to validate its antitumoral property. It showed a reduction of preneoplastic lesions and justifies continuing further studies for its chemoprevention potential.
• Antigenotoxic, antimutagenic and ROS scavenging activities: Extensively used in traditionally medicine in Mexico for the treatment of superficial mycoses, a study was done to evaluate its antimutagenic and antigenotoxic activities. The extract was neither mutagenic nor genotoxic. It showed dome radical scavenging, less than a-tocopherol and more than ascorbic acid.
• Antimutagenic Mechanism: Study of antimutagenic mechanisms showed the extract might be used to avoid DNA damage by alkylation, corrected alkylguanine transferase protein encoded with ogt gene.
• ·Antimicrobial / Phytochemical Constituents : Phytochemical studies yielded alkaloids, flavonoids, steroids, saponins, cardiac glycosides, terpenoids, tannin and phenolic compounds and oil. Study showed good inhibitory activity with dose-dependent increase in effect. K pneumonia was found to be most susceptible.