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What are the differences between Cassia obtusifolia (Ketsumeishi), Cassia occidentalis (Habuso), and Cassia tomentosa? We explain how to distinguish between similar species! And "Habu tea" isn't actually made from Cassia occidentalis!?

Cassia obtusifolia, Cassia japonica, and Cassia nomame are all annual plants belonging to the legume family, and were formerly classified in the same genus. Their common characteristics include once-pinnately compound leaves with opposite leaflets, and flowers with five yellow petals of almost identical shape...
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What are the differences between snake gourd, yellow snake gourd, and wild gourd? We explain how to distinguish between similar species! Is the "creepy" appearance of the flowers a result of evolution?!

Trichosanthes cucumeroides, Trichosanthes cucumeroides, and Trichosanthes spp. all belong to the Trichosanthes genus of the Cucurbitaceae family. They are herbaceous plants that share several common characteristics: they produce large, fused-petal flowers with a finely divided corolla resembling lace, and they bear fairly large, yellow to red fruits for wild species. Trichosanthes cucumeroides and Trichosanthes spp....
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What are the differences between Bidens pilosa, Bidens frondosa, Bidens pilosa, and Bidens serrata? An explanation of how to distinguish between similar species.

Bidens pilosa, Bidens frondosa, Bidens pilosa, and Bidens serrata are all annual plants belonging to the Bidens genus of the Asteraceae family. Their most distinctive feature in relation to humans is that their fruits are "burrs." They grow along roadsides and around bodies of water, clinging to animal fur and human clothing...
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What are the differences between goldenrod, autumn goldenrod, and mountain goldenrod? How do they differ from other goldenrod species? This article explains how to distinguish between similar species.

Goldenrod (Solidago altissima), autumn goldenrod (Solidago virgaurea), and mountain goldenrod (Solidago virgaurea var. japonica) all belong to the genus Solidago in the Asteraceae family, and are representative perennial plants that bloom with small yellow flowers (more accurately, flower heads) in autumn. Goldenrod, in particular, is well-known because it proliferates rapidly in some regions...
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What are the differences between periwinkle, climbing periwinkle (Vinca), and dwarf climbing periwinkle? An explanation of how to distinguish between similar species.

Periwinkle, climbing periwinkle, and dwarf periwinkle all belong to the Apocynaceae family and are cultivated in Japan for ornamental purposes, frequently seen even in urban areas. They are popular for their interesting features, such as their fused petals with five propeller-shaped lobes at the tip, but their names are similar, especially the climbing periwinkle...
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What's the difference between Fatsia japonica and Fatsia japonica? We'll explain how to distinguish between similar species! The glossy leaves are actually a sunbathing spot for insects!?

Both Fatsia japonica and Fatsia japonica belong to the Araliaceae family and are evergreen trees most characterized by their large, palmately lobed leaves. Both can be observed both outdoors and in gardens. They share many other similarities, which can sometimes lead to confusion. However, distinguishing between them is relatively easy, based on leaf size, hairiness, etc.
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ヤブコウジ・ツルコウジ・マンリョウ・カラタチバナの違いは?似た種類の見分け方を解説!「葉で窒素固定をする」のは嘘だった!?

ヤブコウジ・ツルコウジ・マンリョウ・カラタチバナはいずれもサクラソウ科ヤブコウジ属に含まれ、照葉樹林で自生しますが、秋~冬に赤い球形の果実をつけることからセンリョウ科のセンリョウなどとともに観賞用に盛んに栽培されている常緑小低木です。日本で...
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コミカンソウ・ヒメミカンソウ・ナガエコミカンソウの違いは?似た種類の見分け方を解説

コミカンソウ・ヒメミカンソウ・ナガエコミカンソウはいずれもコミカンソウ科コミカンソウ属に含まれ、畑や道端に生え、花よりも無数のミカンのような小さな緑色~赤色の果実をつけている様子が印象的な一年草です。これら3種はコミカンソウ属の中でも高頻度...
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What are the differences between Clerodendrum trichotomum and Clerodendrum frequens? An explanation of how to distinguish between similar species.

Both Clerodendrum trichotomum and Clerodendrum sibiricum belong to the mint family and are sometimes cultivated for ornamental purposes. Their most significant commonality is the similar shape of their flowers. Specifically, both have very long stamens and pistils that curve downwards (curl) and protrude far from the flower. Therefore...
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キンケイギク・オオキンケイギク・ハルシャギク・ホソバハルシャギクの違いは?キバナコスモスとの違いは?似た種類の見分け方を解説

キンケイギク・オオキンケイギク・ハルシャギク・ホソバハルシャギクはいずれもキク科ハルシャギク属に含まれ、特徴は少ないものの、「非常に派手な黄色の一重咲き~二重咲きのキク」という印象を受ける一年草または越年草です。特にオオキンケイギクは特定外...
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