# Castor Bean (*Ricinus communis*) The Castor Bean plant has large, glossy leaves and spiky seed pods. It grows tall with vibrant red or green seeds that are poisonous if eaten. - **Category:** [Plants](https://www.snappit.app/explore/categories/plant) - **Rarity:** Common - **Danger:** 4/5 · High - **Snaps:** 16 - **Habitat:** Various environments - **Also known as:** Castor Oil Plant, Palma Christi ![Castor Bean](https://commons.wikimedia.org/w/index.php?title=Special:Redirect/file/Casterplant_03.jpg&width=800) Photo: Dvellakat, CC BY-SA 4.0 · [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Casterplant_03.jpg) ## Appearance The Castor Bean has large, deeply lobed leaves, often reddish or purplish, resembling a giant star or hand. Its sturdy stems can be green to dark red, topped with spiky, often vibrant red or green seed pods that burst open when ripe, revealing patterned seeds. ## Taxonomy - **Kingdom:** Plantae - **Phylum:** Tracheophyta - **Class:** Magnoliopsida - **Order:** Malpighiales - **Family:** Euphorbiaceae - **Genus:** Ricinus ## Interesting facts - Ancient Egyptians used castor oil thousands of years ago for lamps and as a medicine! - Castor Bean is a 'monotypic' genus, meaning it's the only species in its entire group! - The highly toxic ricin from its seeds is one of the most poisonous natural substances known. - The seeds were once used as a precise unit of weight for gems and medicines! ## Special abilities - **Toxic Shield:** Castor Bean produces ricin, a deadly poison, in its seeds and other parts, making it extremely dangerous for most animals to eat. - **Spiky Seed Grenades:** Castor Bean has spiky seed pods that explosively open, flinging seeds far away to spread its offspring. - **Rapid Growth Power:** Castor Bean can grow incredibly fast in warm climates, quickly outcompeting other plants for sunlight and space. ## Measurements & details - **Height:** 100-600 cm - **Spread:** 100-300 cm - **Bloom Season:** Summer to fall, year-round in tropical climates - **Edible:** No - **Toxicity:** Deadly - **Lifecycle:** Perennial - **Pollination Method:** Wind ## Ecological connections - **Pollinates:** Honey bee (*Apis mellifera*) — visits flowers for pollen, aiding wind dispersal - **Eaten by:** [Death's-head hawkmoth](https://www.snappit.app/explore/death-s-head-hawkmoth) (*Acherontia atropos*) — caterpillars feed on its leaves despite toxicity - **Depends on:** Sweet potato whitefly (*Bemisia tabaci*) — feeds on sap, weakening the plant as a pest - **Depends on:** Two-spotted spider mite (*Tetranychus urticae*) — sucks plant juices, causing leaf damage ## Traits - [Nitrogen Fixing](https://www.snappit.app/explore/traits/nitrogen-fixing): Describes organisms capable of converting atmospheric nitrogen into compounds usable by plants. - [Shade Tolerant](https://www.snappit.app/explore/traits/shade-tolerant): Shade tolerant plants are adapted to grow and thrive in areas with low light levels, requiring less direct sunlight. - [Broadleaf Tree](https://www.snappit.app/explore/traits/broadleaf-tree): Broadleaf trees are angiosperms characterized by flat, wide leaves that are typically shed annually in temperate climates. - [Medicinal](https://www.snappit.app/explore/traits/medicinal): Medicinal plants possess chemical compounds that can be used for therapeutic purposes to treat illnesses or maintain health. - [Oil Crop](https://www.snappit.app/explore/traits/oil-crop): This human use trait identifies species cultivated as oil crops, harvested for their seeds or fruits from which vegetable oils are extracted for food, fuel, or industrial uses. - [Rapid Growing](https://www.snappit.app/explore/traits/rapid-growing): Rapid growing plants exhibit accelerated growth rates, quickly increasing in size and biomass within a short period. - [Toxic](https://www.snappit.app/explore/traits/toxic): Toxic organisms contain substances that are poisonous and can cause adverse effects upon exposure. - [Poisonous](https://www.snappit.app/explore/traits/poisonous): Poisonous organisms produce toxins that can cause harm when ingested, inhaled, or absorbed through contact. - [Urban Friendly](https://www.snappit.app/explore/traits/urban-friendly): This habitat trait indicates species that can coexist with humans in urban and suburban environments, utilizing man-made structures and green spaces. - [Threatened](https://www.snappit.app/explore/traits/threatened): Threatened status denotes a species likely to become endangered in the foreseeable future without effective conservation interventions. ## Collections - [Fungi](https://www.snappit.app/explore/collections/fungi) - [Plants](https://www.snappit.app/explore/collections/plants) ## Safety **Danger:** 4/5 · High Never touch or eat any part of the Castor Bean plant as it is poisonous. ## Frequently Asked Questions ### How to identify Castor Bean? Start with the whole plant, then compare leaf arrangement, leaf edges, stems and any flowers or fruit. Opposite leaves grow in pairs; alternate leaves come one at a time along the stem. These details tell you far more together than a single green leaf does. Plant Identifier: upload a photo and compare the visible details. ### How tall is Castor Bean? 100-600 cm ### How wide does Castor Bean spread? 100-300 cm ### When does Castor Bean bloom? Summer to fall, year-round in tropical climates ### Is Castor Bean edible? No ### Is Castor Bean toxic? Deadly ### What is Castor Bean's lifecycle? Perennial ### How is Castor Bean pollinated? Wind ## Where to spot - [Arroyo Conejo Open Space](https://www.snappit.app/guides/places/arroyo-conejo-open-space) — California, US · Park - [Conejo Valley Botanical Garden](https://www.snappit.app/guides/places/conejo-valley-botanical-garden) — California, US · Botanical Garden - [Little Italy](https://www.snappit.app/guides/places/little-italy) — California, US · Neighborhood - [Presidio Park](https://www.snappit.app/guides/places/presidio-park) — California, US · Nature Reserve - [Santa Ana Zoo](https://www.snappit.app/guides/places/santa-ana-zoo) — California, US · Zoo - [Selig Zoo](https://www.snappit.app/guides/places/selig-zoo) — California, US · Zoo [View all places to see Castor Bean](https://www.snappit.app/guides/where-to-see/castor-bean) ## More Plants - [white snakeroot](https://www.snappit.app/explore/white-snakeroot) (*Ageratina altissima*) - [tree-of-heaven](https://www.snappit.app/explore/tree-of-heaven) (*Ailanthus altissima*) - [western sword fern](https://www.snappit.app/explore/western-sword-fern) (*Polystichum munitum*) - [common milkweed](https://www.snappit.app/explore/common-milkweed) (*Asclepias syriaca*) --- Source: [Castor Bean: Facts & Places to See — Snappit](https://www.snappit.app/explore/castor-bean)