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Ricinus communis L.

Arind · Harnoli
Synonym: Ricinus africanus Mill

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Description

Ricinus communis is a fast-growing annual or perennial shrub, usually 1–5 m tall, but under favourable tropical conditions it may develop into a small tree up to 10 m tall. The plant has an erect, hollow, branched stem that is green, reddish-purple, or glaucous depending on variety. The stem and leaves contain white milky latex when damaged. Leaves are large, simple, alternate, palmately lobed, usually 20–60 cm wide, with 5–11 deep lobes, serrated margins, a long petiole, and a glossy or waxy surface. The foliage may vary from green to reddish-purple. Flowers are small, unisexual, and arranged in terminal or axillary racemes. The species is monoecious, with male flowers located mainly in the lower portion of the inflorescence and female flowers above. Male flowers contain numerous stamens, while female flowers possess conspicuous reddish stigmas. Fruits are dry, globose, spiny three-lobed capsules containing three large mottled seeds. The seeds possess a characteristic caruncle and contain toxic ricin.

Diagnostic Characters

Vegetative
Large palmate leaves with deep lobes. Long petioles. Rapid-growing shrub habit. Stem often reddish or purple. Milky latex present.
Floral
Terminal racemes. Male flowers below and female flowers above. Monoecious reproductive system.
Fruit & Seed
Spiny three-lobed capsule. Large mottled seeds. Characteristic castor seeds.

Distribution

Native range: Native origin is considered Tropical Africa, Possibly northeastern Africa and adjacent regions. Now widely distributed throughout Tropical and subtropical Asia, Africa, Europe, Americas, Australia. It is cultivated and naturalized worldwide.

In Pakistan: Very common throughout Pakistan. Found along Roadsides, Riverbanks, Agricultural margins, Waste places, Disturbed habitats.

Phenology

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Flowering
Fruiting
Flowering: Almost throughout the year in tropical regions Fruiting: Summer–autumn

Ethnobotany & Uses

Industrial Importance
Ricinus communis is economically important due to castor oil, extracted from its seeds. Castor oil is used in Pharmaceutical industries, Cosmetics, Lubricants, Biodiesel research, Industrial polymers. The oil contains high levels of ricinoleic acid, which gives it unique industrial properties.
Medicinal Importance
Used traditionally for Laxative preparations, Skin moisturization, Hair care. Used in some traditional systems for Inflammation, Pain relief, External applications, Toxicity. The seeds contain ricin, a highly toxic protein. Consumption of raw seeds may cause Severe gastrointestinal symptoms, Organ damage, Potentially fatal poisoning. The toxic compound is removed during proper industrial oil processing.
Ecological Importance
Provides habitat and food resources for insects. Rapid colonizer of disturbed habitats. Important species for studying plant adaptation to harsh environments.
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Where it grows on campus

This species is on the campus floristic list but was not pinned during the GPS mapping survey, so it has no map records yet.

Taxonomic Notes

Ricinus communis is a highly distinctive member of Euphorbiaceae and the only species of the genus Ricinus. It can be easily recognized by its Large palmately divided leaves, Spiny fruits, Mottled seeds, Tall shrub-like habit. The species has significant economic importance but requires careful handling because of seed toxicity. UniFlora Field Recognition Tip 🌿.