出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2012/05/23 18:05:12」(JST)
| Antirrhinum majus | |
|---|---|
| Plant growing in an old wall in Thasos, Greece | |
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Asterids |
| Order: | Lamiales |
| Family: | Plantaginaceae/Veronicaceae[1] |
| Genus: | Antirrhinum |
| Species: | A. majus |
| Binomial name | |
| Antirrhinum majus L. |
|
Antirrhinum majus (Common Snapdragon; often–especially in horticulture–simply "snapdragon") is a species of plants belonging to the genus Antirrhinum. It is native to the Mediterranean region, from Morocco and Portugal north to southern France, and east to Turkey and Syria. [2][3] The common name "snapdragon", originates from the flowers' reaction to having their throats squeezed, which causes the "mouth" of the flower to snap open.
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It is a herbaceous perennial plant growing to 0.5-1 m tall, rarely up to 2 m. The leaves are spirally arranged, broadly lanceolate, 1-7 cm long and 2-2.5 cm broad. The flowers are produced on a tall spike, each flower is 3.5-4.5 cm long, zygomorphic, with two 'lips' closing the corolla tube; wild plants have pink to purple flowers, often with yellow lips. The fruit is an ovoid capsule 10-14 mm diameter, containing numerous small seeds. [4] The plants are pollinated by bumblebees, and the flowers close over the insects when they enter and deposit pollen on their bodies.
There are five subspecies:[2][3]
The species is often planted in gardens for its flowers. Although perennial, it is often treated as an annual plant, particularly in colder areas where they may not survive the winter. Numerous cultivars are available, including plants with lavender, orange, pink, yellow, or white flowers, and also plants with peloric flowers, where the normal flowering spike is topped with a single large, symmetrical flower. [4][5] The trailing (creeping) variety is often referred to as A. majus pendula (syn. A. pendula, A. repens).
It often escapes from cultivation, and naturalised populations occur widely in Europe north of the native range,[4] and elsewhere in temperate regions of the world.[3]
In the laboratory it is a model organism,[6] for example containing the gene DEFICIENS which provides the letter "D" in the acronym MADS-box for a family of genes which are important in plant development.
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| リンク元 | 「キンギョソウ」 |
| 関連記事 | 「Antirrhinum」 |