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(First upload on August 20 2012. Last on January 27 2021) [ 日本語 | English ]

Thelypteris palustris (Salisb.) Schott






Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily

Thelypteris Schmidel (ヒメシダ)
T. palustris (Salisb.) Schott

adopted by: 岩槻 1992, 中池 1992, 海老原 2016

Himeshida (ヒメシダ, 姫羊歯), marsh fern
Syorima (ショリマ)
Lifeform: long-rhizomatous, summergreen fern
Distribution: temperate regions, including Japan
Habitat: wetlands, grassy marshlands, streamsides, etc.
Leaf: dimorphic, 40-80 cm long

sterile frond
fertile frond: slim, leaf length ≈ 30 cm long

Leaf stalk (petiole): 20-40 cm long
Lateral vein: dichotomous and hairless (number of veins, 中軸分岐数)
Chromosome number: n= 35, or 36, 2n = 70 (diploid)
Synonyms:

Acrostichum thelypteris L.
Dryopteris thelypteris A. Gray (牧野 1977)
Lastrea thelypteris (L.) Bory, adopted by (田川 1959)
Polypodium palustre Salisb.
Thelypteris thelypteroides (Michx.) Holub
Thelypteris palustris (Salisb.) Schott ssp. pubescens (G. Lawson) Fraser-Jenk.
Thelypteris confluens (Thunb.) C. V. Morton, recently used

f. pubescens (G. Lawson) Clute (ヒメシダ, s.s.)
f. palustris (ハダカヒメシダ), hairless
索引

Thelypteris palustris in Hokkaido


f. pubescens

ST1 ST2 ST3
ST4 ST5 ST6
ST7 ST8 ST9
[1] at Abiragawa fen on July 16 2012. [2] in Shizukari wetland, southern Hokkaido, on June 15 2015. [3-5] along a walkboard to go Mokeuni Pond, Sarufutsu Village, northern Hokkaido, o August 27 2015. [6] along the shore of Echigo Pond in Ebetsu City on October 8 2017. [7-9] in Tomakomai Experimental Forest, used for observing succession, on September 14 2017.

Specimens kept in SAPS

ST1 ST2 ST3
[1-3] along a paved road in Utasai Wetlands, southern Hokkaido, on August 28 2018.

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