WordNet
- fern with elongate silvery outgrowths enclosing the developing spores (同)Deparia acrostichoides, Athyrium thelypteroides
- made from or largely consisting of silver; "silver bracelets"
- a soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal; occurs in argentite and in free form; used in coins and jewelry and tableware and photography (同)Ag, atomic number 47
- coins made of silver
- make silver in color; "Her worries had silvered her hair"
- turn silver; "The mans hair silvered very attractively"
- having the white lustrous sheen of silver; "a land of silver (or silvern) rivers where the salmon leap"; "repeated scrubbings have given the wood a silvery sheen" (同)silvern, silvery
- coat with a layer of silver or a silver amalgam; "silver the necklace"
- any of various chiefly rock-inhabiting ferns of the genus Asplenium
PrepTutorEJDIC
- 『銀』(金属元素;化学記号は『Ag』) / (商品・通貨基準としての)銀 / 『銀貨』(一般に銀白色の)硬貨 / 《集合的に》『銀(銀めっき)の食器類』,銀器 / 『銀製の』,銀めっきした / 銀色の,銀白色の / …‘に'銀めっきする / 《文》…‘を'銀色にする / 銀色になる
- (色・光沢が)銀のような,銀色の / (音が)銀の鈴を鳴らすような
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/07/26 03:13:25」(JST)
[Wiki en表示]
| Silvery glade fern |
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|
Conservation status
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Secure (NatureServe)
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| Scientific classification |
| Kingdom: |
Plantae |
| Division: |
Pteridophyta |
| Class: |
Pteridopsida |
| Order: |
Blechnales |
| Family: |
Athyriaceae |
| Genus: |
Deparia |
| Species: |
D. acrostichoides |
| Binomial name |
Deparia acrostichoides
(Sw.) M. Kato |
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| Range within North America |
| Synonyms[1] |
- Asplenium acrostichoides Sw.
- Asplenium thelypterioides Michx.
- Athyrium acrostichoides (Swartz) Diels
- Athyrium thelypterioides (Michx.) Desv.
- Diplazium acrostichoides (Swartz) Butters
- Diplazium thelypteroides (Michx.) C. Presl
- Lunathyrium acrostichoides (Sw.) Ching
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Deparia acrostichoides, commonly called silvery glade fern or silvery spleenwort is a perennial species of fern. Its range include much of the eastern United States and Canada, from Ontario to Nova Scotia, and Georgia to Louisiana and eastern Asia in China, Russia, Japan and Korea.[2][3] The name silvery comes from the fact that the indusia on the underside of the leaf have a silver color when the sori are close to ripening.
Description
Silvery spleenwort has pinnately divided yellowish green leaves arising from a a stout, green, slightly brown hairy and scaly stem. The stem is typically grooved on the upper side, much shorter than the leaf blade and darker colored near its base, being dark red or brown, as the stem reaches the leaflets it becomes a pale green color. The leaves are broadest in the middle with a long pointed tip and tapering base with the lowest pair of leaflets generally pointing downward. The tapering and downward pointed bottom leafs are a diagnostic characteristic for helping to distinguish this fern from similar ferns.
The leaves are 30-80 cm long and 10-25 cm in width, their underside is covered in fuzzy yellow-green hairs. There are approximately 18 leaflets on a leaf, these are approximately 15 cm long and 1 cm wide and relatively straight. The leaflets are themselves cut into oblong subleaflets which may have a blunt or rounded tip. The sterile and fertile leaflets are similar in form. The fertile leaves bear sori on the underside of the leaves and are silvery green at first but later become light brown as they ripen. The sori are pinnately arranged on the subleafets in a pattern which follows the veination; they are typically straight or slightly curved with a thick indusia with with an entire margin. [4][5][6] The fertile pinnae can be described as acrostichoid as the sporangia covers almost the entirety of the underside of the leaf surface.[7] Acrostichoid is also the term from which D. acrostichoides derives its species name.
It often forms extensive colonies, growing from creeping roots. Silvery spleenwort is a common fern in stream bottoms, moist woods, and cool shaded areas throughout its range.
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Showing ripened sori and indusia
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Showing unriped silvery indusia which gives this species its name
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References
- ^ "Tropicos | Name - Deparia acrostichoides (Sw.) M. Kato". www.tropicos.org. Retrieved 23 June 2016.
- ^ "Tropicos | Name - Deparia acrostichoides (Sw.) M. Kato". www.tropicos.org. Retrieved 23 June 2016.
- ^ "Plants Profile for Deparia acrostichoides (silver false spleenwort)". plants.usda.gov. Retrieved 23 June 2016.
- ^ Rhoads, Ann; Block, Timothy. The Plants of Pennsylvania (2 ed.). Philadelphia Pa: University of Pennsylvania press. ISBN 978-0-8122-4003-0.
- ^ Foster, Boughten Cobb ; illustrations by Laura Louise (1987). A field guide to ferns : and their related families : Northeastern and Central North America : with a section on species also found in the British Isles and Western Europe ([New ed., pbk. ed.]. ed.). Boston: Houghton Mifflin. ISBN 0-395-19431-8.
- ^ "Taxon Page". www.efloras.org. Retrieved 23 June 2016.
- ^ Coulter, John (1917). The Botanical Gazette (volume LXIV). p. 347. Retrieved 26 June 2016.
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Related Links
- Silvery-spleenwort definition, a fern, Diplazium pycnocarpon, of eastern North America, having fronds from 20 to 30 inches (50.8 to 76.2 cm) long on yellowish-green stalks. See more. Thesaurus Translator Reference Word of the ...
- Silvery spleenwort definition, a fern, Diplazium pycnocarpon, of eastern North America, having fronds from 20 to 30 inches (50.8 to 76.2 cm) long on yellowish-green stalks. See more. Thesaurus Translator Reference Word of the ...
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