Living things

What's the difference between Japanese knotweed (Cayratia japonica) and wild grape (Vitis coignetiae)? We explain how to distinguish between similar species! Why are they exterminated? Are they actually edible? Were the wasps that visit the saucer-shaped flowers hired as bodyguards?!

Japanese knotweed (Cayratia japonica) and wild grape (Vitis coignetiae) are among the most common climbing plants in the grape family. While they belong to the same family and are both climbing plants, they can be easily distinguished by the shape of their leaves and flowers. Japanese knotweed is a target for eradication due to its strong reproductive capacity, impact on the landscape, and its ability to attract bees...

2021.09.21

plant

What are the differences between Hibiscus mutabilis (Fuyou) and Hibiscus sakishimaensis? We explain how to distinguish between similar species! Do slight differences in flower shape affect pollination strategies?

Both Hibiscus mutabilis and Hibiscus sakishimaensis belong to the Hibiscus genus of the Malvaceae family. They produce large, beautiful flowers, and when naturalized, they both grow in disturbed locations, making them difficult to distinguish. The difference can be achieved by carefully observing the leaves and stellate hairs. There are also slight differences in flowering period and flower color. Flowers...

2021.09.21

plant

What are the differences between foxglove (Digitalis) and comfrey? We'll explain how to distinguish between similar species! Are they poisonous? Did foxglove flowers undergo unique evolution in America?

Digitalis (foxglove) and comfrey are two well-known poisonous horticultural species native to Europe. Their leaves are very similar; the upper leaves lack petioles, while the lower leaves have petioles and wings (where the leaf blade extends onto the stem). Comfrey, once edible, was often mistaken for digitalis...

2021.09.20

plant

What are the differences between Monotropa uniflora, Monotropa uniflora var. alba, and Monotropa japonica? We explain how to distinguish between similar species! Why did they lose photosynthesis? What insects visit the flowers? Cockroaches are responsible for seed dispersal!?

Monotropa uniflora, Monotropa uniflora var. japonica, and Monotropa uniflora are three plant species that grow in the dark forest floor where photosynthesis has been lost. They lack normal leaves, instead having reduced scale-like leaves. They have only stems and flowers, and their entire bodies are white due to the absence of chlorophyll. They are known as mycoheterotrophic plants, but the distinction is not always clear...

2021.09.20

plant

What are the differences between Tradescantia virginiana, Tradescantia japonica, Tradescantia fluminensis, and Tradescantia montanus? We'll explain how to distinguish between similar species! Did they expand their distribution through vegetative reproduction? What is the role of the white threads that come from flowers that don't produce nectar?

Tradescantia virginiana (also known as Tradescantia japonica or Tradescantia erythrorhizon) and Tradescantia flabellata are species of the Tradescantia genus that were cultivated in horticulture for ornamental purposes and are now rapidly becoming naturalized. Because they are varieties that originally had various forms before becoming naturalized, their morphology is diverse. Current classifications include leaf shape, leaf...

2021.09.20

plant

What are the differences between pomegranates, dwarf pomegranates, and flowering pomegranates? What is their history? What are their health benefits? Is the saying "birds visit the flowers" a myth? What part of the pomegranate is referred to as the "fruit"?

Pomegranates are native to Iran and northern India and are cultivated worldwide. While there are no closely related species in Japan, making differentiation relatively easy, several cultivated varieties are known, with the dwarf pomegranate (Pomegranate japonica) and the flowering pomegranate (Pomegranate humilis) being representative examples. The leaves of the pomegranate and dwarf pomegranate are...

2021.09.20

plant

Polygonatum Odoratum Var Pluriflorum Flower

What are the differences between Polygonatum odoratum, Polygonatum sibiricum, Polygonatum humile, and Disporum sessile? What insects visit the downward-facing flowers? Polygonatum odoratum was producing flowers with only stamens due to nutrient deficiency!?

Polygonatum odoratum, Polygonatum sibiricum, Polygonatum humile, and Disporum sessile are all species that bloom in spring and are commonly found in gardens and as wildflowers, but they can be a little difficult to distinguish because they are often sold mixed together. Therefore, I have summarized the botanical distinguishing features of the Polygonatum genus. Mainly, the way the flowers grow...

2021.09.20

plant

What's the difference between Kintoranoo and Koushunkazura? We'll explain how to distinguish between these similar species! Did their ancestors evolve to secrete oil instead of nectar, only to then "revert" back to their normal appearance?!

Malpighiinae and Kadsunokazura are two of the most popular species in Japan belonging to the Malpighiaceae family, and are often cultivated as ornamental plants in gardens, but they are also frequently confused. The biggest difference between them is that Malpighiinae is an evergreen shrub, while Kadsunokazura is a woody vine...

2021.09.20

plant

What are the differences between Nigella (Nigella fuciformis) and Black Cumin (Nigella fragrans)? What are their medicinal properties? What are their components? Did the flowers deceive insects by creating false nectar glands?!

Nigella (Ilex crenata) and black cumin (Ilex rotunda) are cultivated worldwide for ornamental and medicinal purposes, and are now common in Japan, but they are very easily confused. Even searching online will bring up many incorrect photos. However, distinguishing between them is actually quite difficult...

2021.09.20

plant

What's the difference between a banyan tree and a fig tree? Why is it called the "strangler fig"? Where are the flowers? Only one type of insect visits the flowers!? Where are the real fruits? It's an important food source for bats!?

The Japanese banyan tree (Ficus microcarpa) and the Japanese Ficus microcarpa (Ficus sylvestris) are known as two "strangler figs" in southern Japan, both producing drooping aerial roots and forming receptacles. Ecologically, they are similar, and it can be difficult to distinguish between them. However, there are significant differences in leaf venation and leaf length between the two. Also, regarding aerial roots...

2021.09.20

plant