(First upload on October 24 2008. Last on May 15 2018) [ 日本語 | English ]

Drosera anglica Hudson

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

Drosera L. (モウセンゴケ)
Nagabanomousengoke (ナガバノモウセンゴケ, 長葉ノ毛氈苔), great sundew, or English sundew
Lifeform: perennial carnivorous forb (食虫植物)
Distribution (map): widespred in circumboreal regions (also reported from Kauai Island, Hawaii, and California)

In Japan, this species has been recorded only from Oze (central Honhsu) and Hokkaido (Sarobetsu and Daisetsu)

Habitat: nutrient-poor, wet, sunny (= non-forested) sites, e.g., bog → wetland (湿原)

Push-out from favorable habitats, because of low-competitive ability (Hoyo & Tsuyuzaki 2014)
RDB Japan: endangered species II (vulnerable) (絶滅危惧種)

Chromosome number: 2n = 40

Drosera longifolia Drev. et Hayne
Drosera longifolia L.


Drosera anglica in Sarobetsu Mire

Drosera1 Drosera2 [1] on June 20 2008. the locality is non-disclosure for saving this species. [2] on May 24 2015, partly D. obovata.
fd This work is partly supported by Nippon Flower Designers' Association in 2017 and 2018
Drosera1 Drosera2 [1] pollen grains of D. anglica (plausible) observed under a binocular stereomicroscope. The plant sample was collected a few days bofore taking the photos on July 5 2005. [2] seeds taken by a microscope (VH-5500, KEYENCE/キーエンス) on April 10 2013. Compare to the seeds of D. rotundifolia.

Drosera obovata Mert. et Koch, pro sp., in Sarobetsu Mire

= D. anglica × rotundifolia: 2n = 30
Sajibamousengoke (サジバモウセンゴケ, 匙葉毛氈苔)

establishing with the populations of D. anglica and D. rotundifolia

Fertility: infertile in nature

Drosera1 Drosera2 Drosera3
Drosera4 Drosera5
[1] on May 24 2015. [2/3] on May 22 2016. [4/5] on May 29 2017.