(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: 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)


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.

Distributions of D. anglica and D. rotundifolia

Distr D. anglica DistrD. rotundifolia

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

= D. anglica × rotundifolia
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.