Bitterwood Tree
Picrasma
A genus of deciduous trees and shrubs known for their extremely bitter bark and medicinal …
This typical variety of the empress tree dominates temperate and subtropical landscapes with its spectacular spring floral display. Characterized by its rapid growth and vast canopy, it is one of the most widely recognized deciduous trees of East Asian origin. It has adapted successfully to various regions worldwide, sometimes establishing itself in disturbed ecosystems.
The morphological profile of Paulownia tomentosa var. tomentosa is marked by extreme pubescence. The stems, petioles, and both surfaces of the cordate leaves are densely covered in sticky, branched, glandular hairs, which give the plant its characteristic velvety feel. These leaves are exceptionally large, often reaching 15 to 40 centimeters in length.
Its inflorescences are pyramidal panicles containing numerous pale violet to purple flowers. Each flower features a cylindrical-campanulate corolla with five lobes and a yellow-striped interior. The fruit is an ovoid, woody capsule that splits to release thousands of tiny, membranous-winged seeds dispersed by the wind.
Mid-spring, usually from April to May, preceding the leaves
This typical variety supports several traditional and ecological industries. Its main applications include:
The historical significance of this tree in East Asia includes the custom of planting one at the birth of a daughter, then harvesting it to build a wedding chest when she marries. It has become an invasive weed in several parts of North America and Europe due to its ability to produce millions of viable seeds annually. The specific epithet tomentosa refers directly to the dense, woolly hairs that cover its leaves and stems.
Picrasma
A genus of deciduous trees and shrubs known for their extremely bitter bark and medicinal …
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Araucaria sect. Araucaria
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Araucaria
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