The Royal Palm (Roystonea regia) is a majestic, fast-growing palm tree known for its smooth, grey trunk and tall stature, often reaching heights of 50 to 100 feet. It's native to tropical and subtropical regions and is the national tree of Cuba. Royal palms are characterized by large, pinnate leaves with long, glossy leaflets. They thrive in warm, humid environments and prefer well-draining soil with consistent moisture. 

Here's a more detailed look at the Royal Palm:

Key Characteristics:

Height: Typically 50-100 feet (15-30 meters). 

Trunk: Smooth, grey, and often wider at the base, tapering towards the top. 

Leaves: Large, pinnate (feather-like) with long, glossy leaflets. 

Crownshaft: Bright green and smooth, located just below the leaves. 

Habitat: Thrives in tropical and subtropical climates with high humidity and consistent moisture. 

Soil: Prefers well-draining soil, but can adapt to different types. 

Watering: Requires regular watering, especially when young, and benefits from consistent moisture. 

Sunlight: Thrives in full sun. 

Other Notable Aspects:

National Tree of Cuba:

The Royal Palm holds significant cultural importance as the national tree of Cuba. 

Florida Royal Palm:

The Florida royal palm (Roystonea elata) is considered synonymous with the Cuban royal palm in many contexts. 

Cultivation:

Widely cultivated in tropical and subtropical regions for its ornamental value. 

Potential Uses:

Royal palm waste can be used as a raw material for producing bioenergy and renewable chemicals. 

Conservation:

The Kew Gardens reports that AI indicates over half of palm species are at risk of extinction, highlighting the importance of conservation efforts.