Princess tree
Paulownia tomentosa
Paulownia tomentosa, known as the empress tree, is an exceptionally fast-growing deciduous tree famous for …
Laotian Paulownia (Paulownia laotica)
Silhouette: T. Michael Keesey
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Paulownia laotica: Distribution, Botany, and Ecology
Growing naturally in the tropical and subtropical forests of Laos, Vietnam, and southern China, Paulownia laotica forms a medium to large deciduous tree. The species occupies forested valleys and slopes, contributing to the structural diversity of its native ecosystems. Its rapid establishment and canopy development make it an ecologically significant pioneer species.
The tree thrives in moist, well-drained soils and is well-adapted to warm, humid climates. It plays an important role in forest regeneration by colonizing disturbed areas quickly.
Taxonomy
- ∟ царство Plantae
- ∟ division Tracheophytes (Vascular Plants)
- ∟ subdivision Spermatophytes (Seed plants)
- ∟ Angiosperms
- ∟ mesangiosperms (Core angiosperms)
- ∟ eudicots
- ∟ asterids
- ∟ order Lamiales
- ∟ family Paulowniaceae (Paulownia family)
- ∟ genus Paulownia (Empress tree)
- ∟ species Paulownia laotica (Laotian Paulownia)
Morphology
The vegetative structures of this species are notable for their large, heart-shaped leaves that can exceed 25 centimeters in width. The undersides of the leaves are covered in dense, stellate hairs, which protect the stomata from excessive transpiration.
Important morphological features include:
- Inflorescence: Pyramidal panicles that are less compact than those of other Paulownia species.
- Flowers: Trumpet-shaped corollas, usually pale lavender or nearly white, often featuring yellow stripes along the inner throat.
- Fruit: Small, woody, ovoid capsules that split into two valves upon maturity.
- Bark: Smooth and greyish-brown when young, developing shallow fissures as the tree ages.
Flowering season
Early spring, typically from March to April
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Applications
Local communities utilize the lightweight timber of this tree for basic construction, crates, and hand-carved household utensils. Its low density and stability make it easy to work with hand tools.
Key applications include:
- Agroforestry: The tree's deep rooting habit allows it to be intercropped with agricultural plants without competing heavily for surface nutrients.
- Reforestation: It is planted to restore degraded forest lands and establish quick canopy cover in Southeast Asia.
Interesting facts
This tree exhibits a high physiological tolerance to seasonal climate fluctuations, surviving both wet monsoonal periods and brief dry spells. Its large leaf surface area contributes significantly to local microclimate cooling through transpiration.
Other interesting facts include:
- Carbon Sequestration: Due to its rapid growth, it is a highly efficient carbon sink, storing significant carbon in its wood during its early years.
- Limited Cultivation: Unlike some of its relatives, this species remains relatively rare in botanical collections and commercial plantations outside Southeast Asia.
Geography of distribution
- Laos
- Vietnam
- China
Sources
- Plants of the World Online (POWO)
- World Flora Online (WFO)
- Tropicos - Missouri Botanical Garden
See also
Fortune's paulownia
Paulownia fortunei
A fast-growing deciduous tree native to East Asia, cultivated for its lightweight timber and showy …
Sapphire Dragon Tree
Paulownia kawakamii
A critically endangered deciduous tree native to Taiwan and southern China, highly valued for its …
Elongate paulownia
Paulownia elongata
A remarkably fast-growing deciduous tree native to East Asia, cultivated for its lightweight timber, biomass …