Tailless Guiana simaba (Simaba guianensis var. ecaudata)
Simaba guianensis var. ecaudata: Botanical Description and Range
Undisturbed rain forests of the Guianas and northern Brazil support the growth of Simaba guianensis var. ecaudata. This wild variety thrives under the canopy of primary tropical forests, adapting to high humidity and shaded environments. It forms part of the rich understory diversity of the Amazonian and Guianan floristic provinces.
Taxonomy
- β ΡΠ°ΡΡΡΠ²ΠΎ Plantae
- β division Tracheophytes
- β subdivision Spermatophytes (Seed plants)
- β Angiosperms
- β mesangiosperms
- β eudicots
- β Superrosids
- β rosids
- β malvids
- β order Sapindales
- β family Simaroubaceae (Quassia family)
- β genus Simaba (Simaba Tree)
- β species Simaba guianensis (Guiana calunga)
- β variety Simaba guianensis var. ecaudata (Tailless Guiana simaba)
Morphology
The variety grows as a woody shrub or small understory tree with smooth, greyish-brown bark. Unlike the typical variety, the leaflets of Simaba guianensis var. ecaudata lack the elongated, tail-like apex, as suggested by the name ecaudata. The leaves are pinnate, with leaflets featuring an oblong shape and a slightly lustrous upper surface.
Its small flowers are arranged in terminal or axillary panicles, presenting five small petals and distinct puberulent filaments. The ovaries are free but joined by a single style, forming drupes as they mature. The ripe fruits are small, single-seeded drupes dispersed by forest fauna.
Flowering season
Flowering is typically observed between June and August in its native range.
Applications
Members of this genus are well-known for producing diverse quassinoids with bitter biological activity. Indigenous groups have occasionally used forest preparations for digestive complaints and fever management. There are no commercial applications or cultivation practices established for this specific forest taxon.
Interesting facts
The term ecaudata translates to tail-less, indicating the absence of a long-pointed leaf tip on the leaflets. This structural difference helps field botanists distinguish it from other varieties of the same species. It plays a role in the local food web by providing seasonal food for small forest birds and mammals.
Geography of distribution
- French Guiana
- Brazil
- Guyana
- Suriname
Sources
- POWO (Plants of the World Online): Simaba guianensis var. ecaudata
- GBIF (Global Biodiversity Information Facility): Simaba guianensis var. ecaudata records
- Tropicos: Simaba guianensis var. ecaudata specimen list