White Evening-Primrose (Oenothera Rosea) 白花夕化粧（シロバナユウゲショウ）

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Evening primroses (Oenothera rosea) are native to America but can now be found across Japan. It usually produces pink flowers from May to September but some have white ones like those in these pictures. Seeing flowers brings me happiness and seeing white evening primroses especially does so because it's so rare to find them. Finding white ones makes me feel as if I had found four-leaf clovers!   

2026/4/21

Yellow-Cress (Rorippa) イヌガラシ属（犬芥子）

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Yellow-cress (Rorippa) is native to Asia and should be found across Japan but not so often in Central Tokyo. The plant grows in wet habitat, producing yellow flowers from April to June in Japan. Its Japanese name is "inu garashi," which translates to "dog mustard greens," because the plant tastes like mustard greens but is of lower quality as food. (To be continued below the 1st photo.)

2026/4/28

Pale Grass Blue (Pseudozizeeria Maha) 大和小灰蝶（ヤマトシジミ）

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A male pale grass blue (Pseudozizeeria maha) butterfly looks completely different when its wings are open (1st photo) and closed (2nd photo). When closed, you may disregard it because it's plain, just a small white butterfly with black spots. When the wings are open, however, you would be surprised by the beautiful pale blue of the upper side of its wings as suggested by the name. (If you want to see the butterfly showing both sides, see the 3rd photo.) Butterflies are known to open their wings to bask in the sun to warm their bodies, so you're more likely to see the beautiful blue in autumn than summer.   

The pale grass blue resembles the plains cupid (Luthrodes pandava) very much except for the latter having orange spots on the wings. I once mistook a plains cupid for a pale grass blue.   

2025/11/2

Fuzzy Deutzia (Deutzia Scabra) マルバウツギ（丸葉空木）

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The shrub looks like slender deutzia (Deutzia gracilis) (and AI tells so) but I believe this is fuzzy deutzia (Deutzia scabra) because its leaves are round (which is why its Japanese name is "maruba utsugi," translating to "round leafed deutzia") and the flowers are upward facing (while slender deutzia flowers are downward facing). Fuzzy deutzia is native to Japan and can be found across the country. The plant produces white flowers from April to May. 

2026/4/19

Persian Speedwell (Veronica Persica) オオイヌノフグリ（大犬の陰嚢）

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Persian speedwell (Veronica persica) is native to West Asia or Europe. The plant is believed to have come to Japan in the late 19th century and now can be found across Japan. There are a variety of speedwell (see below the 1st photo) but Persian speedwell is the easiest to tell because of its relatively larger size than other types. Persian speedwell usually produces blue flowers but some produce pinkish blue ones (scroll down). (To be continued below the 1st picture.)

2026/4/19

Red Flowering Dogwood (Cornus Florida) 赤い花水木（ハナミズキ）

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Flowering dogwood (Cornus florida) is native to North America but can now be found across Japan, producing red, white, and cream white flowers from April to May. The dogwood was donated by the U.S. to Japan in 1915 in exchange for cherry trees, a gift of friendship from Japan to the U.S.

Flowering dogwood shows us not only beautiful flowers but also gorgeous leaves in autumn. 

2026/4/19

Hyacinth Orchid (Bletilla Striata) シラン（紫蘭）

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Hyacinth orchids or Chinese ground orchids (Bletilla striata) are native to China, Taiwan, and Japan and can be found across Japan. The plant produces beautiful pinkish purple flowers from April to May, which look even more beautiful against the green leaves and/or the blue sky. The plant can also have white flowers, which I've never seen. 

Hyacinth orchids are relatively easy to grow but are so invasive that many Japanese websites advise against growing them in the garden. 

2021/4/19

Lesser Quaking-Grass (Briza Minor) ヒメコバンソウ（姫小判草）

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Lesser quaking-grass (Briza minor) is native to Europe and came to Japan during the Edo period (1603-1868). The plant produces spikelets form April to June, which are very tiny and cute but are so small that you wouldn't normally notice them. According to the internet, the spikelets produce a rattling sound when shaken or when wind passes through them. Next time I find them, I'll shake them, of course, gently. 

2026/4/17

Spanish Bluebell (Hyacinthoides Hispanica) ツリガネズイセン（釣鐘水仙）

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Spanish bluebell (Hyacinthoides hispanica) is native to Spain, Portugal, and North West Africa, coming to Japan in around 1910, and can now be found across the country. The plant produces white, pink, and blue flowers from spring to early summer in Japan. Spanish bluebell is "tsurigane suisen" in Japanese, which translates to "bell daffodil" because of the bell shaped flowers resembling daffodils although Spanish bluebells are not daffodils. They're in the Asparagaceae family while daffodils are in the Amaryllidaceae family. 

2026/4/17

Japanese Red Maple (Acer Pycnanthum) ハナノキ（花之木）

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Japanese red maple trees (Acer pycnanthum) are native to Japan. Their Japanese name is "hananoki," translating to "flower tree," which is too general, isn't it? The tree is named as such after its deep red flowers standing out because they're produced before green leaves are in early spring when no other flowers are seen. This makes sense. I first found the flowers because the red color stood out in early March.  

2026/4/17

2026/3/29

White Ajuga 白のアジュガ

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These are WHITE ajuga. I've seen purple and pink ajuga but it's my first time to see white ones.

2026/4/17