Caudex Plant Glossary

A general term for plants with swollen trunks or roots that store large amounts of water. Pachypodium and Adenium are representative examples. The term comes from the Latin word caudex, meaning trunk or stem.

A genus of caudex plants native to Madagascar and Africa. Popular species include P. gracilius and P. brevicaule. They are characterized by plump caudices and thorny trunks.

The flagship species of the Pachypodium genus. Native to Madagascar, it is prized for its rounded caudex and yellow flowers. Wild-collected specimens are rare and expensive, but seed-grown plants are widely available.

Plants grown from seed, or the seedlings themselves. Compared to wild-collected plants, seed-grown specimens adapt more easily to local climates and are more affordable. Growing from seed offers the joy of shaping a unique form.

A plant with its roots removed, typically cut off for quarantine during import. Rooting management is required after purchase. The term comes from the English phrase bare root.

The process of encouraging new root growth on a bare root plant. Methods include hydroponics and soil culture. Ideal conditions are 25–30°C, high humidity, and bright indirect light.

The swollen trunk or root base where the plant stores water. It is the main ornamental feature of caudex plants, with each specimen having a unique shape, giving every plant one-of-a-kind appeal.

A period when plant growth stops. Most caudex plants go dormant and drop their leaves in winter. During dormancy, watering should be stopped or greatly reduced, and plants should be kept in a warm place.

Adjusting light levels using shade cloth or similar materials to soften direct sunlight. Used in midsummer to prevent leaf burn and heat stress. A shade rate of 30–50% is typical.

A watering method where the pot sits in a container of water, allowing absorption from the bottom. Commonly used for seed germination and seedling care. Continuous use can cause root rot and should be monitored.

A wild plant collected from its native habitat and imported. These specimens boast impressive caudices and a unique character, but availability is declining due to CITES regulations.

A plant grown from seed domestically in Japan. These are more adaptable to local conditions and less expensive than wild-collected plants. With increasing quality in recent years, they are ideal for beginners.