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Ricinus communis, the castor bean [1] or castor oil plant, [2] is a species of perennial flowering plant in the spurge family, Euphorbiaceae. It is the sole species in the monotypic genus, Ricinus, and subtribe, Ricininae. The evolution of castor and its relation to other species are currently being studied using modern genetic tools. [3]
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Swallowing castor beans rarely proves to be fatal unless the bean is thoroughly chewed. The survival rate of castor bean ingestion is 98%. [9] In 2013 a 37-year-old woman in the United States survived after ingesting 30 beans. [41] In another case, a man ingested 200 castor beans mixed with juice in a blender and survived. [42]
Castor oil is a vegetable oil pressed from castor beans, the seeds of the plant Ricinus communis. [1] The seeds are 40 to 60 percent oil. [2] It is a colourless or pale yellow liquid with a distinct taste and odor. Its boiling point is 313 °C (595 °F) and its density is 0.961 g/cm 3. [3]
Caruncle Carunculate seeds of Ricinus communis (Castor beans) The particular elaiosome in the spurge family Euphorbiaceae is called caruncle (Latin caruncula "wart"). Seeds that have caruncles are carunculate; seeds that do not have caruncles are ecarunculate.
The word 'bean', for the Old World vegetable, existed in Old English, [3] long before the New World genus Phaseolus was known in Europe. With the Columbian exchange of domestic plants between Europe and the Americas, use of the word was extended to pod-borne seeds of Phaseolus, such as the common bean and the runner bean, and the related genus Vigna.
Ixodes ricinus, the castor bean tick, is a chiefly European species of hard-bodied tick. It may reach a length of 11 mm (0.43 in) when engorged with a blood meal, and can transmit both bacterial and viral pathogens such as the causative agents of Lyme disease and tick-borne encephalitis .
It is an evergreen shrub growing to 1–5 m (3 ft 3 in – 16 ft 5 in) tall, with stout, sparsely branched stems. [3] The leaves are spirally-arranged, large, 20–40 cm (7.9–15.7 in) in width and on a petiole up to 50 cm (20 in) long, leathery, palmately lobed, with 7–9 broad lobes, divided to half or two-thirds of the way to the base of the leaf; the lobes are edged with coarse, blunt teeth.