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Justicia gendarussa
Also called White Justicia
In Singapore: Willow-leaved Justicia, Warer Willow, Daun Rusa, Gardarusa, Ganda Rusa, Variegated Gandarus, Variegated Water Willow, Variegated Willow-Leaved Justicia (Grown in Singapore)
Justicia gendarussa is a small, erect, branched shrub from tropical Asia, grown mainly for its medicinal use. It prefers shade and is best grown in a warm, humid, sheltered spot.
Justicia gendarussa, commonly known as Willow-leaved justicia (Marathi: बाकस, bakas, काळा अडुळसा, kala adulasa; Sanskrit: कसनः, kasanah, वैध्यसिंहा, vaidyasinha), Lapsulis in Creole Seychelles; is a small erect, branched shrub. According to Plants of the World Online it is native to the Indian subcontinent (India, Bangladesh, Sri Lanka, and Bhutan), Indochina, Peninsular Malaysia, Sumatra, the Philippines, and New Guinea, and has been introduced to Nepal, the western Himalayas, Pakistan, southern China including Hainan and Taiwan, eastern Africa, and the Mascarene Islands, Comoro Islands, and Seychelles.
The plant prefers shadow and therefore is distributed in the forests of India, Malaysia and Sri Lanka. J. gendarussa is harvested from the wild. Because of its wide range of medicinal use, this causes jeopardizing of its natural biodiversity. Combined with the habitat destruction this uncontrolled harvesting causes the decline of the population. In addition, the plant is propagated by seeds, whose viability is only for a very short period of time. For all this reason it is important to look for alternative and sustainable methods to cultivate and to conserve the plant.
The hydroponic system is an alternative cultivation method for large-scale production. Explants of the J. gendarussa are placed in thermocole sheets and then put into water. The water contains a nutrient solution. There is the possibility to add plant growth regulators, e.g. Indole-3butyric acid, to increase the biomass production especially in the beginning phase to initiate root growth. The temperature is set between 28° and 34 °C and the plants can be harvested after 50 days.
Malabar Nut · Shrimpplant · Brazilian-plume · Justicia floribunda
[Contains information from Leaf Area Index (LAI) and Heritage Trees from data.gov.sg (National Parks Board), made available under the terms of the Singapore Open Data Licence version 1.0]
Text excerpted from the Wikipedia article Justicia gendarussa by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
