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What species resembles the egret orchid? The flowers are visited by hawk moths! And not only that, tiny insects called thrips also play an important role in pollination! What is the "Egret Orchid Legend"?

The egret orchid (Habenaria radiata) is a perennial plant that inhabits slightly damp areas and is a popular choice for gardening. Unfortunately, due to the decline of its wetland habitat and illegal harvesting, it is listed as near-threatened on the Ministry of the Environment's Red List. There are many closely related species, and many that share the name "egret orchid," but this particular species has a flattened stem resembling a heron...
2022.06.07
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What are the differences between sunflowers, dwarf sunflowers, and white sunflowers? We'll explain how to distinguish between similar varieties! Is it a myth that sunflowers face the sun? Why are they the national flowers of Russia and Ukraine?

Sunflowers are said to face the sun, giving them a cheerful and bright image, and they are now very familiar plants in Japan. Originally from North America, there are many species, but the types of sunflowers found in Japan are limited, mostly consisting of the common sunflower, dwarf sunflower, and dusty sunflower. Humans and sunflowers...
2022.05.10
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What are the differences between *Broussonetia papyrifera* and *Broussonetia kozoa*? Do *Broussonetia papyrifera* flowers burst open? What is the history of *Broussonetia papyrifera*? Are its fruits edible?

Both *Broussonetia papyrifera* and *Broussonetia erythrorhizon* have been used as paper since ancient times, and *Broussonetia papyrifera* can still be found in familiar green spaces today. However, some literature suggests that the distinction between these two species is not very clear, and they have historically been confused with each other. However...
2022.05.04
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What are the differences between *Neolitsea sericea* and *Quercus acuta*? We'll explain how to distinguish between these similar species! What are their uses? Does the difference in flower color affect their ecology?

Both *Neolitsea sericea* and *Quercus acuta* are evergreen trees belonging to the *Neolitsea* genus that are naturally distributed in Japan. Therefore, you may often see them in the wild, but their leaves are very similar in shape, which can lead to confusion. However, you can reliably distinguish them by examining the whiteness of the underside of the leaves and the color of their fruits...
2022.03.19
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Why is black tea preferred over green tea in the UK? Are flies the only ones that visit tea plant flowers?

Tea plants contain essential nutrients like catechins and caffeine, making them an indispensable beverage in Japan, enjoyed both at home and on the go. As you may know, its origin lies in China, and it's a species not native to Japan. However, even in China, wild varieties haven't been confirmed, which is puzzling...
2022.02.21
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What species resembles *Cat's Whiskers* (Kumiskuching)? We'll explain how to distinguish them, and reveal that butterflies specialize in visiting the flowers! What are the effects of Kumiskuching tea?

*Cat's Whiskers* (Kumiskuching) is a popular ornamental horticultural plant in Japan, known for its long stamens. In Okinawa, it's called *Kumiskuching* and is sometimes used to make *Kumiskuching* tea. Several closely related species exist within the same genus, but they don't resemble each other very much. Japan...
2021.11.07
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Is it a lie that only male osmanthus plants were introduced to Japan? Are there insects that dislike its unique scent?

Osmanthus fragrans is a dioecious evergreen small tree generally said to be native to China. It is frequently stated that only male plants were brought to Japan. However, in recent years, it has been thought that this is likely not true, and that the trees are actually a clonal population selected in Japan...
2021.10.04
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There are differences between Japanese daffodils and regular daffodils! Are they poisonous? How do they differ from chives? Where are they native to? Why did the flowers evolve to bloom in winter?

Daffodils are a very popular ornamental plant in Japan, blooming in winter. However, a little research reveals that they are sometimes referred to as "Japanese daffodils" (Nihon-zuisen) or simply "daffodils." Is there a difference between Japanese daffodils and regular daffodils? Japanese daffodils are native to China...
2021.09.23
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What are the differences between *Kibushi* and *Hachijo-kibushi*? What are the different species in the *Kibushi* genus? We'll explain how to distinguish between similar species! Do the fruits turn your teeth black? Did the flowers have a strategy to attract different insects during the day and night?

Stachyurus praecox, once considered endemic to Japan, is now widely distributed throughout the country. Although there are only two distinct species, their varieties are quite diverse, making identification difficult. While some argue that these variations exhibit continuity and should not be distinguished, this article will deliberately avoid making distinctions...
2021.09.23
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There are differences between plumeria and Indian jasmine! We'll explain how to distinguish between similar species! When did it arrive in Hawaii? Is it poisonous? Were the flower's flashy colors and scent an evolutionary adaptation to deceive moths?!

Plumeria is a popular garden plant known for its vibrant, large flowers and fragrance, symbolizing the tropics. However, it is also known as Indian jasmine. The terms "plumeria" and "Indian jasmine" may have different meanings. In Japan, "Indian jasmine" often refers to a single, common variety...
2021.09.22
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