Asiatic Dayflower (Commelina Communis) 露草（ツユクサ）

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The Asiatic dayflower (Commelina Communis) is native to eastern Asia and can be found across Japan. It produces blue flowers from June to September in Japan, which look to me like a mantis head. The flower has been appreciated in Japan, mentioned in the Man'yōshū (i.e., the oldest extant collection of Japanese poetry in Classical Japanese), compiled sometime after 759 during the Nara period. 

The plant's Japanese name is "tsuyukusa," which translates into "dew plant," because of its brief lifespan, like morning dew.

2026/8/17

Red Morning Glory (Ipomoea Coccinea) マルバルコウソウ（丸葉縷紅草）

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Red morning glories (Ipomoea coccinea) are native to North America, brought into Japan in the Edo period (1603-1858) for ornamental purposes, and can now be found across Japan. Despite their beauty, however, red morning glories are designated as weeds of concern by the National Agricultural Research Organization of Japan.

2026/8/16

2026/8/16

Angled Sunbeam (Curetis Acuta) ウラギンシジミ（裏銀小灰蝶）

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This is a female angled sunbeam (Curetis acuta), a butterfly which can be found in eastern Asia including Japan. It's easy to tell its male from its female as the male has an orange center on the upperside of its wings while the female has a pale blue center. 

The butterfly's Japanese name is "ura shijimi," which translates into "Lycaenidae with its underside being silver."    

2026/8/16

Pale Blue Golden Dewdrop (Duranta Erecta) 水色のデュランタ

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Deep purple golden dewdrops can be often found but not pale purple ones. The leaf shape and sprawling shrubs are the same but the flower color difference makes them look like different plants. 

2026/8/16

2026/8/16

Common Straight Swift (Parnara Guttata) イチモンジセセリ（一文字挵）

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The common straight swift (Parnara guttata) can be found across, and is loved in, Japan. Moths open wings when resting while most butterflies rest with their wings closed but common straight swift butterflies sometimes rest with open wings to absorb the warmth of the sun, thanks to which I've learned that their back is green (scroll down). Also scroll down to see an ant carrying a dead common straight swift.  

The common straight swift's Japanese name is "ichimonji seseri," which translates into "straight line skipper" after its white spots in a straight line while small branded swift (Pelopidas mathias), which has white spots in a circle, has a Japanese name "chabane seseri," which translates into "brown wing skipper."   

I really love common straight swift butterflies for their squirrel-like cute eyes. 

2026/8/16

Showy Evening Primrose (Oenothera speciosa) ヒルザキツキミソウ（昼咲月見草）

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I thought that they were gigantic rosy evening-primroses (Oenothera rosea) at first and found at home they are not but showy evening primroses. This primrose is native to North America and was imported to Japan as an ornamental plant and can now be found across Japan. The primrose produces flowers from May to July in Japan, which are 4-5 cm in diameter and open during only the day. Because of that, its Japanese name is "hiruzaki tsukimisou," which translates into "primrose opening during the day." 

2026/8/15

Skunkvine (Paederia Foetida) 屁糞葛（ヘクソカズラ）

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Skunkvine (Paederia foetida) is native to Asia and can be found across Japan. The perception of the plant in Japan is it's smelly (as in other countries), so its Japanese name is "hé kuso kazura," which translates into "fart shxx vine." The plant is also so hardy that an imperial court official in the Nara period (710-794) composed a waka poem that he wanted to work hardily like the plant. The poem is included in The Manyōshū, i.e., the oldest extant collection of Japanese waka poetry compiled during that period. 

Despite such a terrible name and the smell, however, the flower's glossy red center always reminds me of jam thumbprint cookies. 

2026/8/14

2026/8/14

Bitter Gourd (Momordica Charantia) ゴーヤ（苦瓜）

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Bitter gourds (Momordica charantia) are native to tropical Asia, came to Okinawa, i.e., one of the southern islands in Japan, in the early 15th century, and can now be found across Japan. The gourds are monoecious, which means they produce yellow, male and female flowers from July to August but it's easy to tell because the male has the yellow center while the female has the green center. They usually produce male flowers first to ensure the safe fertilization of the female ones. So, the ratio of male to female in early summer is about 10:1. 

Ripe orange gourds (scroll down) are edible including the red seeds and even jelly like stuff around the seeds. 

2026/8/10  A male flower

2020/8/8  Male and female flowers 雄花と雌花

"Drunken" Confederate Rose スイフヨウ（酔芙蓉）

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These are Confederate roses (Hibiscus mutabilis cv. versicolor) and the first five photos are of one flower, taken at 10:00, 12:30, 15:30 and 16:30 on 16 September 2024 and at 5:30 on the following morning. Because of such a color change from pure white in the morning to pink in the afternoon, this type of Confederate roses is called "drunken Confederate rose" in Japan.

The sixth and the last ones are red and white marbled. Some Japanese apricot trees produce such colored flowers but (I believe that) a Confederate rose tree producing such flowers is quite unusual. White apricot trees don't exist but red ones produce white or red/white marbled flowers when they cannot produce enough anthocyanins to make flowers red. The same may apply to this hibiscus tree. 

If you want to see peach, Japanese apricot, or lespedeza having white, pink/red or marble-colored flowers on a tree, read the following posts: 

- Red & White Marble Colored Flowering Peach

- Half & Half Colored Japanese Apricot (White & Pink)!

- Lespedeza Japonica Bailey cv. Versicolor (Variegated Bush Clover)

10:00 a.m., 2024/9/16

12:30 p.m., 2024/9/16

15:30 p.m., 2024/9/16

White-Banded Hunter Hawkmoth (Theretra Oldenlandiae) セスジスズメ（背筋雀）

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Impatiens hawkmoths or white-banded hunter hawkmoths (Theretra oldenlandia) can be found across Japan. Their caterpillars are beautifully black with a stark contrast with orange spots while the adults are cool, looking like fighter aircrafts. The adults can be found from May to October in Japan.   

2026/8/5

2026/8/11

Sea Roach (Ligia Exotica) フナムシ（船虫）

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Sea roaches (Ligia exotica) live in rocky marine coasts, harbor walls, piers, and docks just above the high-tide line. One of their characteristics is their agility. They run so fast that I've been able to take photos of them only twice, both of which time, they suddenly stopped for some reason. I always say "eek!" when finding them but I also find them when running creepy cute.

 

I first saw one in 2024 when taking an early morning walk along the river. Something small and black crossed in front of me at a GREAT speed. I automatically followed it but suddenly it stopped. It stayed there for ten seconds or so and suddenly started to run again at a greater speed. Its move was so cute but its appearance is not so. That was my first encounter with a sea roach. They're roaches, which explains their agility. 

2026/8/11