Codiaeum variegatum

It is a tropical, evergreen, monoecious shrub growing to 3 m (9.8 ft) tall and has large, thick, leathery, shiny evergreen leaves, alternately arranged, 5–30 cm (2.0–11.8 in) long and 0.5–8 cm (0.20–3.15 in) broad. The leaf blades can, for example, be ruler-lanceolate, oblong, elliptic, lanceolate, ovate inverted, ovate spatulate, or violin-shaped and coloured green, yellow, or purple in various patterns, depending on the variety. The petiole has a length of 0.2 to 2.5 cm. The inflorescences are long racemes, 8–30 cm (3.1–11.8 in) long, with male and female flowers on separate inflorescences; the male flowers are white with five small petals and 20–30 stamens, pollens are oval approximately 52x32 microns in size. The female flowers are yellowish, with no petals. The flowering period is usually in early autumn. The fruit is a capsule 9 mm (0.35 in) in diameter, containing three seeds that are 6 mm (0.24 in) in diameter. When cut, stems bleed a milky sap like many of the Euphorbiaceae.[2][3][5]

Pollen

Male inflorescence on a plant in Hyderabad, India.

In tropical climates, crotons make attractive hedges and potted patio specimens, valued for their striking foliage. They only survive outdoors where temperatures do not normally drop below 10 to 13 °C (50 to 55 °F) in winter; colder temperatures can cause leaf loss.[3] In colder climates, the plants are grown in greenhouses or as house plants. The cultivated garden crotons are usually smaller than the wild plant, rarely over 1.8 m (5.9 ft) tall, and come in a wide diversity of leaf shapes and colours. They are sometimes grouped under the name Codiaeum variegatum var. pictum (Lodd.) Müll. Arg.,[3] though this is not botanically distinct from the species and usually treated as a synonym of it.[2]

As with many of the Euphorbiaceae, the sap can cause contact dermatitis in some people.[6] The bark, roots, latex, and leaves are poisonous.[7] The toxin is the chemical compound 5-desoxyingenol.[7] The plant contains an oil which is violently purgative and is suspected of being a carcinogen.[8] Consumption of the seeds can be fatal to children.[8]

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  C. variegatum in Miyako-jima, Okinawa Prefecture, Japan
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  C. variegatum in Miyako-jima, Okinawa Prefecture
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  Completely yellow leaves on a specimen in Kolkata, India
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  Croton 'Petra' in a botanical garden
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  Narrow-leaved variety
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  A green-yellow variegated variety
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  Female flowers
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  Young fruits