Pilosocereus royenii (bearded cactus) (San Salvador Island, Bahamas) 7 : 無料・フリー素材/写真
Pilosocereus royenii (bearded cactus) (San Salvador Island, Bahamas) 7 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Pilosocereus royenii (Linnaeus, 1753) - bearded cactus in the Bahamas.--------------------This individual is consistent with Pilosocereus millspaughii, a long-haired variety, but it can also be referred to as Pilosocereus royenii sensu lato.--------------------Cactuses are an odd group of flowering plants. Their leaves have been evolutionarily modified into spines, which are used for protection against herbivores. The green, succulent stems of cactuses are the only portions of the plant that engage in photosynthesis.The bearded cactus is a large species consisting of tall, upright, fleshy stems having prominent, axis-parallel longitudinal ridges bearing clusters of radiating spines. A tuft of long, whitish hair occurs on one side near the top - the “beard”. If moisture/dew form on the hairs, the water drips downward, near the plant's roots. This is an evolutionary adaptation to living in an arid climate. The bearded cactus only occurs on Caribbean islands and in Central America’s Yucatan Peninsula.Classification: Plantae, Angiospermophyta, Caryophyllales, CactaceaeLocality: next to Crescent Pond, northeastern San Salvador Island, eastern Bahamas--------------------More info. at:en.wikipedia.org/wiki/Pilosocereus_royenii |
| 撮影日 | 2012-06-19 10:17:04 |
| 撮影者 | James St. John |
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