Nepedia
Back to Discover
Advanced Reader
🧬

Styrax

life science Maturity 5-7 Next article →

Styrax is a genus containing approximately 130 species of large shrubs and small trees. These plants belong to the family Styracaceae. Most species are native to the warm temperate to tropical regions of the Northern Hemisphere. You can find many in eastern and southeastern Asia. Some species also grow across the equator in South America. These trees typically grow between 2 and 14 meters tall.

Styrax officinalis
Styrax officinalis

They possess simple, ovate leaves that are either deciduous or evergreen. Their flowers are pendulous and feature a white, 5-to-10-lobed corolla. These flowers grow in clusters called panicles, which can be 5 to 25 cm long.

A primary feature of many Styrax species is the production of resin. This resin is a dried exudation that forms when the tree bark is pierced. The resulting substance is commonly called benzoin or storax. It is highly valued for its vanilla-like scent in perfumery.

Styrax benzoin - Köhler–s Medizinal-Pflanzen-133
Styrax benzoin - Köhler–s Medizinal-Pflanzen-133

In nature, this resin serves a vital protective function. It acts to kill pathogens in tree wounds. It also serves to deter herbivores from eating the plant. Because of this, few Lepidoptera caterpillars regularly consume Styrax compared to other plants.

There are several distinct types of benzoin resin traded internationally. Some of the most common come from species native to Sumatra, Java, and Thailand. For example, Styrax tonkinensis is known as Siam benzoin. Styrax benzoin is referred to as Sumatra benzoin. Another common variety is Styrax benzoides. The name "benzoin" likely comes from the Arabic term "lubān jāwī," meaning "Javan frankincense." This linguistic link shows that Arabic speakers were aware of the resin's origins. It also suggests that international trade in these resins was major by the late Middle Ages.

Human history with Styrax spans back to antiquity. The Greek historian Herodotus wrote about different kinds of storax in the 5th century BC. He noted that Phoenician merchants traded these resins. There is some historical uncertainty regarding which specific plants ancient sources called "storax." Some researchers believe they may have been referring to the Turkish sweetgum. This is a different tree in the Altingiaceae family that produces a similar resin. Today, little trade exists for Turkish sweetgum because the species has declined. However, Southeast Asian benzoin resins remain widely available.

The resin has many significant uses in medicine and culture. In the Middle Ages, benzoin became a key part of various medicinal recipes. In 1686, a Venice treacle recipe called "Theriaca Andromachi Senioris" included benzoin resin. In the 19th century, many cosmetics used a substance called tincture of benzoin. This is benzoin resin dissolved in alcohol. Today, tincture of benzoin is used in first aid for small injuries. It acts as a disinfectant and a local anesthetic to help healing.

It also contains benzoic acid, which provides antibiotic activity.

Beyond medicine, Styrax plays a role in various cultural rituals. Storax incense is used as an air freshener in the Middle East. It is also burned during Buddhist and Hindu rituals.

Styrax obassia flowers 002
Styrax obassia flowers 002

Some species are also used for ornamental purposes in gardens. For instance, Styrax japonicus and Styrax obassia are popular in parks. The wood of larger species is useful for fine handicrafts. In Japan, the wood from the egonoki tree is used to build the kokyū, a bowed musical instrument.

Styrax camporum Pohl136
Styrax camporum Pohl136

This shows the wide range of utility these trees provide.

While many Styrax species thrive, some face serious conservation challenges. Some species have declined due to habitat degradation and unsustainable logging. Many of these are classified as vulnerable by the IUCN. A notable example is the palo de jazmin, or Styrax portoricensis. This species is nearly extinct, with only four trees known to survive in one location. Because they are so rare, a single hurricane could wipe out the entire species. Protecting these specific habitats is essential for the survival of the genus.

633 words

Where will your curiosity go next?

Keep exploring at your chosen reading level.

🖼️ Images & Media (5)
File:Styrax officinalis.jpg
Styrax officinalis.jpg
File:Styrax benzoin - Köhler–s Medizinal-Pflanzen-133.jpg
Styrax benzoin - Köhler–s...
File:Styrax japonica1.JPG
Styrax japonica1.JPG
File:Styrax camporum Pohl136.png
Styrax camporum Pohl136.png
File:Styrax obassia flowers 002.JPG
Styrax obassia flowers 002.JPG
More to explore

✨ What else?

Related topics you might enjoy

🔬 Go deeper

More advanced topics to explore

🪜 Step back

Simpler topics to build understanding

What is Nepedia?

A free, ad-free encyclopedia for children. Every article is written at five reading levels, so the same page works for a five-year-old and a fifteen-year-old — use the level switcher above to see this one change. No account needed to read.