Bitter Quassia
Quassia amara
Quassia amara, commonly known as amargo or bitterwood, is a tropical shrub native to the …
Smooth Quassia (Quassia glabra)
Silhouette: T. Michael Keesey
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Quassia glabra: Botanical Profile & Distribution
Deep within the humid equatorial rainforests of Central Africa, the canopy shelters unique botanical treasures adapted to dense shade and constant moisture. Among these specialized species is the evergreen tree Quassia glabra, which has intrigued taxonomists since its formal description in the mid-20th century.
The species is distinguished by its glossy, glabrous foliage that efficiently sheds the heavy tropical downpours. Over the years, botanists have studied Quassia glabra to better understand the evolutionary lineages of the Simaroubaceae family.
Taxonomy
- ∟ царство Plantae
- ∟ division Tracheophytes
- ∟ subdivision Spermatophytes (Seed plants)
- ∟ Angiosperms
- ∟ mesangiosperms
- ∟ eudicots
- ∟ Superrosids
- ∟ rosids
- ∟ malvids
- ∟ order Sapindales
- ∟ family Simaroubaceae (Quassia family)
- ∟ genus Quassia (Quassia Wood)
- ∟ species Quassia glabra (Smooth Quassia)
Morphology
Quassia glabra is a medium to large forest tree characterized by its smooth, hairless (glabrous) branches and foliage. The leaves are alternate, pinnately compound or sometimes reduced, with entire margins and a coriaceous (leathery) texture that helps prevent water loss in the humid canopy.
The inflorescences typically consist of axillary or terminal panicles bearing small, actinomorphic flowers. These blossoms feature distinct sepals and petals, usually in shades of green or pale yellow, adapted for pollination by forest insects.
The fruit of Quassia glabra is a drupe or a cluster of drupelets, containing seeds with minimal endosperm.
Interesting facts
- Taxonomic Revision: The species was originally described under a different genus by German botanist Adolf Engler, before the Dutch botanist Hans Nooteboom transferred it to the genus Quassia in 1963 during his comprehensive study of the Simaroubaceae family.
- Etymology of the Name: The specific epithet glabra is derived from Latin, meaning 'smooth' or 'hairless', referencing the distinct lack of trichomes or hairs on the leaves and young shoots of the tree.
- Herbarium Records: Historical specimens of Quassia glabra are preserved in major global collections, including the Royal Botanic Gardens, Kew, and Harvard University Herbaria, serving as vital references for tropical biodiversity.
Geography of distribution
- Cameroon
- Gabon
- Republic of the Congo
- Democratic Republic of the Congo
- Equatorial Guinea
Sources
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