''Crinum asiaticum'', commonly known as poison bulb, giant crinum lily, grand crinum lily, or spider lily, is a plant species widely planted in many warmer regions as an

ornamental Ornamental may refer to: *Ornamental grass, a type of grass grown as a decoration *Ornamental iron, mild steel that has been formed into decorative shapes, similar to wrought iron work *Ornamental plant, a plant that is grown for its ornamental qua ...

. It is a bulb-forming

perennial A perennial plant or simply perennial is a plant that lives more than two years. The term ('' per-'' + '' -ennial'', "through the years") is often used to differentiate a plant from shorter-lived annuals and biennials. The term is also wide ...

producing an

umbel In botany, an umbel is an inflorescence that consists of a number of short flower stalks (called pedicels) that spread from a common point, somewhat like umbrella ribs. The word was coined in botanical usage in the 1590s, from Latin ''umbella'' " ...

of large, showy flowers that are prized by gardeners. However, all parts of the plant are poisonous if ingested. Some reports indicate exposure to the sap may cause skin irritation. ''C. asiaticum'' is native to Indian Ocean islands, East Asia, tropical Asia, Australia and Pacific islands. It is regarded as naturalized in Mexico, the West Indies, Florida, Suriname, Louisiana, numerous Pacific islands, Madagascar and the

Chagos Archipelago The Chagos Archipelago () or Chagos Islands (formerly the Bassas de Chagas, and later the Oil Islands) is a group of seven atolls comprising more than 60 islands in the Indian Ocean about 500 kilometres (310 mi) south of the Maldives archi ...

Description

''C. asiaticum'' is a perennial herb that typically grows up to tall. It has a leaf base. Its pseudobulb is spherical. The upper part of the bulb is cylindrical. The base is laterally branched, with a diameter of about 6–15 cm. Its leaves are lanceolate, margin undulate, apically acuminate. They feature 1 sharp point and are dark green, growing up to 1 m long. Their width is 7–12 cm or wider and they number 20-30. The inflorescence is an umbel with 10-24 flowers, six petaloid

tepals A tepal is one of the outer parts of a flower (collectively the perianth). The term is used when these parts cannot easily be classified as either sepals or petals. This may be because the parts of the perianth are undifferentiated (i.e. of very ...

, and aromatic. The flower stem is erect, as long as the leaf, and solid. The spathe is lanceolate, membranous, and 6–10 cm. The bractlet liner is 3–7 cm. Its perianth tube is slender and straight, green white, 7–10 cm, diameter 1.5–2 mm. The corolla is spider-like shaped, white, linear, revolute, attenuate, 4.5–9 cm long, and 6–9 mm wide. The corolla is 6-lobed. The pedicel is ca 0.5-2.5 cm long. It has 6 reddish stamens. The filaments are 4–5 cm long. The anthers are liner, attenuate, ca. 1.5 cm long or more. The ovary is fusiform, and up to 2 cm long. The fruit is an oblate capsule, green, and 3–5 cm in diameter. The seeds are large, and the exotesta is spongy.

Toxicity

The entire plant is toxic, especially the bulb. It contains a variety of

alkaloid Alkaloids are a class of basic BASIC (Beginners' All-purpose Symbolic Instruction Code) is a family of general-purpose, high-level programming languages designed for ease of use. The original version was created by John G. Kemeny and Th ...

s such as

lycorine Lycorine is a toxic crystalline alkaloid found in various Amaryllidaceae species, such as the cultivated bush lily ('' Clivia miniata''), surprise lilies ('' Lycoris''), and daffodils (''Narcissus''). It may be highly poisonous, or even lethal, w ...

and tazettine. When eaten, it can cause vomiting, abdominal pain, severe diarrhea, constipation, irregular breathing, rapid pulse, fever, etc.; sufficient misuse can cause nervous system paralysis and death.

Use

The

Tao people The Tao people are an Austronesian ethnic group native to the tiny outlying Orchid Island of Taiwan. They have a maritime culture, with great ritual and spiritual significance placed on boat-building and fishing. Their ways of life have been thr ...

indigenous to

Taiwan Taiwan, officially the Republic of China (ROC), is a country in East Asia, at the junction of the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the northe ...

Orchid Island Orchid Island, also known by other names, is a volcanic island off the southeastern coast of Taiwan Island. The island is part of Taiwan. It is separated from the Batanes of the Philippines by the Bashi Channel of the Luzon Strait. It is g ...

uses slices of its stem (known as ''vakong'') tied to a heavy object to bait fish going into their nets. The Paiwan and Puyuma peoples use this plant (''livakong'') as a natural boundary plant.

References

asiaticum Flora of China Flora of the Indian subcontinent Flora of Korea Flora of Japan Flora of Indo-China Flora of the Southwestern Pacific Flora of Malesia Flora of Papuasia Flora of Taiwan Flora of Seychelles Flora of Mauritius Flora of Christmas Island Flora of the Bonin Islands Flora of the Ryukyu Islands Plants described in 1753 Taxa named by Carl Linnaeus {{Amaryllidaceae-stub