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Adiantum Glaucinum
''Adiantum'' (), the maidenhair fern, is a genus of about 250 species of ferns in the subfamily Vittarioideae of the family Pteridaceae, though some researchers place it in its own family, Adiantaceae. The genus name comes from Greek, meaning "unwetted", referring to the fronds' ability to shed water without becoming wet. Description They are distinctive in appearance, with dark, often black stipes and rachises, and bright green, often delicately cut leaf tissue. The sori are borne submarginally, and are covered by reflexed flaps of leaf tissue which resemble indusia. Dimorphism between sterile and fertile fronds is generally subtle. They generally prefer humus-rich, moist, well-drained sites, ranging from bottomland soils to vertical rock walls. Many species are especially known for growing on rock walls around waterfalls and water seepage areas. The highest species diversity is in the Andes. Fairly high diversity also occurs in eastern Asia, with nearly 40 species in China. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adiantum Aleuticum
''Adiantum aleuticum'', the western maidenhair fern or Aleutian maidenhair, is a species of deciduous fern in the genus ''Adiantum''. Description ''A. aleuticum'' typically grows about 18-30 inches tall and wide. The fronds grow tall, and are fan-shaped, light to medium green with dark brown to black stems. When growing in relative shade, fronds are held horizontally, but it also can grow in high mountains in full sun (often on serpentine rock) with fronds held vertically. New fronds unfurl from a tight coil (circinate vernation) held on a tall stalk. Oblong Sorus, sori (masses of spores) form beneath a curled-under leaflet edge (indusium, false indusium). H20150408-0024—Adiantum aleuticum—RPBG (17192418876).jpg, Tilden Regional Park California Adiantum aleuticum subsp. calderi - Flickr - brewbooks.jpg, growing on serpentine rock Adiantum aleuticum JHT iNat199860221.jpg, Taxonomy Formerly classified as ''A. pedatum'' var. ''aleuticum'', it was shown to be a separate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |