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单词 Bracken fern
释义

Bracken fern

英语百科

Bracken

(重定向自Bracken fern)
Sori on outer edge under the leaves
Young bracken fronds curled
Bracken in the UK with a linear pattern running across the hillside, a possible indication of past cultivation.

Bracken (Pteridium) is a genus of large, coarse ferns in the family Dennstaedtiaceae. Ferns (Pteridophyta) are vascular plants that have alternating generations, large plants that produce spores and small plants that produce sex cells (eggs and sperm). Brackens are noted for their large, highly divided leaves. They are found on all continents except Antarctica and in all environments except deserts, though their typical habitat is moorland. The genus probably has the widest distribution of any fern in the world.

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