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This Page: Home Flowers Calendar Summer (Jun. – Aug.)

Flowers Calendar

Species name (Scientific Name) Photo (Date Taken) Flowering Time Flowering Time Red Data Book Note
1 2 3 4 5 6 7 8 9 10 11 12
Bigleaf hydrangea(Hydrangea macrophylla) Photo (Jul. 27) May, Jun., Jul.

Hydrangeas bloom during the rainy season. However, around the Shirashima Coast in Dōgo Island, they can be found flowering throughout winter.

Ezo-no-yoroigusa(Angelica sachalinensis) Photo (Jun. 28) Jun., Jul., Aug. Critically Endangered (Shimane Prefecture)

Cold region plant. In Japan, this plant is found in northern Honshu and Hokkaido Islands. However, it is also found in Oki (Dōgo Island) and Mt. Daisen (Tottori Prefecture). In Oki it can be found in sunny areas on the roadside or forest edges.

Oki Thistle(Cirsium japonicum var. okiense) Photo (May. 16) May, Jun., Jul., Aug. Native species of the Oki Islands

This native thistle can be easily seen around the Oki Islands. Compared with its counterpart on the mainland, it is thornier, with particularly sharp thorns around the base of the flower.

Glorytree(Clerodendrum trichotomum) Photo (Jul. 30) Jul., Aug., Sep.

Warm region plant. This pioneer species can be found all around the Japanese archipelago. The leaves can be eaten as tempura.

Shirouma-asatsuki(Allium shoenoprasum var.orientale) Photo (Jun. 7) Jun., Jul.

Cold region plant (Sub-alpine species). This plant is a type of wild spring onion found all around the Oki Islands. On the mainland it is found in sub-alpine mountainous areas, however in Oki it lives on the coast.

Takeshima-shishiudo(Dystaenia takeshimana) Photo (Jul. 6) Jun., Jul. Critically Endangered (Shimane Prefecture)

This plant was designated as Cultural Property of Ama Town in 2012. It has only been discovered on the two isolated islands of Ama Town of the Oki Islands (Nakanoshima Island) and Ulleung-do Island of South Korea. It can be seen on the Akiya Coast in Nakanoshima Island. It is called Takeshima-shishiudo, as Ulleung-do was referred to as Takeshima.

Nagoran orchid(Sedirea japonica) Photo (Jul. 10) Jun., Jul. Critically Endangered (Shimane Prefecture)
Endangered (Japan)

Warm region plant. Northernmost extent of Japan (according to a Shimane Prefecture Survey). This plant can be seen around Kasuga Shrine in Dōgo Island. Whilst it is usually found growing around fir or oak trees on the mainland, in Oki it is found on Japanese arborvitae, Japanese white pine and black pine trees. Also, in Oki, the leaves of the normally evergreen plant become wrinkled and hybernate throughout the winter.

Calanthe orchid(Calanthe reflexa) Photo (Aug. 16) Jul., Aug. Vulnerable (Shimane Prefecture)
Vulnerable (Japan)

Found in the mountainous areas of Honshu, Shikoku and Kyushu Islands. In Oki it is found on forest floors on all islands except for Chiburijima Island.

Hamanasu(Rosa rugosa) Photo (May. 3) May, Jun., Jul., Aug. Critically Endangered (Shimane Prefecture)

Cold region plant. This plant is found in northern Japan on the coasts of Hokkaido and Tohoku Region. In Oki it is found on the coast in front of Kasuga Shrine in Dōgo Island. Just across the road you can find the southern flower, nagoran orchid. This is the only known place where these flowers are found in the same environment.

Cornus kousa(Benthamidia japonica) Photo (Jun. 10) Jun., Jul.

Cold region plant. This flower is found on mountain ridges and around beech forests from Honshu to Kyushu Island.

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