Psidium friedrichsthalianum
Psidium friedrichsthalianum is a tropical fruit tree species in the guava family (Myrtaceae). It is commonly known as Costa Rican guava, Cas guava, or simply Cas in Central America. 🌿
🌎 Origin and Distribution
- Native mainly to Costa Rica, Panama, and nearby parts of Central America.
- Cultivated in some tropical regions because of its unique sour fruit.
🌳 Plant Characteristics
- Type: Small evergreen tree or shrub
- Height: Usually about 3–10 meters
- Leaves: Opposite, oval, aromatic like other guava species
- Flowers: White with many stamens (typical guava-type flowers)
🍈 Fruit Characteristics
- Shape: Round to slightly flattened
- Color: Yellow when ripe
- Taste: Very sour and aromatic (much more acidic than common guava)
- Size: Usually 4–6 cm diameter
🍹 Uses
Because the fruit is quite sour, it is rarely eaten fresh. Instead it is used for:
- Fresh juices and drinks (popular in Costa Rica)
- Jams and jellies
- Ice cream and desserts
- Traditional beverages such as “refresco de cas.”
🌱 Cultivation Notes
- Prefers tropical to subtropical climates
- Needs well-drained soil
- Propagated by seeds or grafting
- Often grown in home gardens or small orchards
🔬 Related Species
It is closely related to the common guava:
- Psidium guajava
✅ Interesting fact:
The juice of cas guava is so acidic that in Costa Rica it is often mixed with sugar and water to make a refreshing drink similar to lemonade.
If you want, I can also explain:
- How to grow Psidium friedrichsthalianum 🌱
- Its nutritional and medicinal properties 🧪
- Whether it can grow in Pakistan’s climate 🇵🇰.
