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(First upload on January 3 2014. Last on April 10 2023) [ 日本語 | English ]

Platanthera L. C. Rich. (ツレサギソウ) P. tipuloides (L. f.) Lindl. Hosobanokisochidori (ホソバノキソチドリ, 細葉ノ木曽千鳥, s.l.), Aleutian bog orchid Lifeform: perennial forb Chromosome number: 2n = 42 ssp. linearifolia (Ohwi) K. Inoue (ナガバトンボソウ) ssp. nipponica (Makino) Murata (コバノトンボソウ) Distribution: Japan (not reported from the other countries) Habitat: swamps Flowering stem: erect with one slim, elliptical leaf at the lower part Flower: slanting on a side Spur on lip: turning up with 12-18 mm long

Synonyms: Platanthera nipponica Makino, used when the species is established Platanthera tipuloides (L. f.) Lindl. var. nipponica (Makino) Ohwi ssp. tipuloides var. sororia (Schltr.) Soo (ホソバノキソチドリ, s.s.) Distribution: Far East - Sakhalin - Japan (north to central Honshu) - Kamchatka Habitat: grasslands and grassy marshlands Leaf: larger than the leaves of ssp. nipponica Flower: not slanted / Lip: not turning up var. behringiana (Rydb.) Hultén Distribution: Alaska

Synonyms: Habenaria behringiana (Rydb.) Ames

Platanthera tipuloides in Hokkaido

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ssp. nipponica (コバノトンボソウ)

1 2 3
4 3 3
[1-3] in a post-mined peatland, Sarobetsu mire (サロベツ湿原), northern Hokkaido, on July 23 2014. [4-6] in Shizukari wetland, southern Hokkaido, on July 7 2017. Records: flowering in the post-mined peatland on July 13 2022.

ssp. tipuloides (ホソバノキソチドリ, s.s.)

1 2 3
[1-3] in a post-mined peatland, Sarobetsu mire, on September 6 2002. The specimen is stored in SAPS.