Butia pubispatha: An Overview
Butia pubispatha is a unique and exceedingly rare species of palm that belongs to the Butia genus. This palm species is endemic to the eastern region of Paraná, a state located in southeastern Brazil. Recognized for its distinct characteristics and underground trunk, Butia pubispatha has drawn the attention of botanists and plant enthusiasts alike. Discovered relatively recently, in 2008, this species exemplifies the biodiversity found within the Brazilian flora.
Etymology of Butia pubispatha
The name “pubispatha” originates from Latin, where “pubes” refers to downy or hairy surfaces. This nomenclature is particularly fitting as it describes the fine, pubescent hairs found on the outer surface of the spathe—the bract that encases the flower cluster. In various horticultural circles, this palm has also been referred to as the “broom jelly palm,” a name that reflects its aesthetic appeal and potential uses in landscaping.
Taxonomy and Discovery
The taxonomic journey of Butia pubispatha began with its discovery by Harri Lorenzi and Kelen Pureza Soares in 2008 during their exploration in Paraná. They collected the type specimen as well as live plants for further study. The subsequent classification of this species was part of a broader effort by Lorenzi and Larry R. Noblick in 2010, during which they described several palms including Butia catarinensis and Butia matogrossensis. Their collaborative work culminated in the publication of “Flora brasileira: Arecaceae (palmeiras)” which formally introduced Butia pubispatha to the scientific community.
Physical Description
Butia pubispatha presents a distinctive appearance that sets it apart from other members of its genus. This palm typically features a solitary trunk that remains mostly subterranean, measuring between 5 to 20 centimeters in diameter. While the trunk is primarily underground, it may occasionally emerge above ground as the plant matures.
The foliage consists of 4 to 13 leaves, each characterized by a petiole that ranges from 5 to 18 centimeters long and is fringed with fibers along its margins. The rachis extends from 25 to 65 centimeters and bears between 16 to 28 pairs of pinnae arranged symmetrically. The pinnae are notably shaped, forming a ‘V’ pattern with lengths varying from 20 to 32 centimeters and widths between 0.4 to 1 centimeter. In their natural habitat, these leaves exhibit a greyish-green coloration, while cultivated specimens often display a bluish-green hue accompanied by a fine white wax on young leaves.
The inflorescence of Butia pubispatha is also unique; it is branched only once and is initially enveloped by a spathe that measures from 20 to 33 centimeters long. This spathe has an enlarged section measuring between 10 to 18 centimeters long and 1.4 to 3 centimeters wide, featuring a green coloration and woody texture. Its outer surface is adorned with short rust-colored hairs that shed easily as it matures.
The flowers exhibit purple or purplish-yellow hues, with male flowers measuring about 9 millimeters in length while female flowers are larger at approximately 7-8 millimeters square. The fruit produced by this palm is ovoid-shaped, measuring between 2 to 2.5 centimeters long and displaying a greenish-purple color when ripe. The flesh inside is sweet-sour, surrounding a hard nut that typically contains one seed.
Similar Species
Butia pubispatha exhibits some similarities with other species within the Butia genus, most notably Butia microspadix. However, there are key differences; for example, while B. microspadix has long-lasting hairs on its spathes, those of B. pubispatha are shorter and fall off during maturity. Additionally, Butia pubispatha demonstrates faster growth rates and greater robustness compared to B. microspadix.
In taxonomic comparisons made by Noblick in a key published in 2014, Butia pubispatha was contrasted with B. marmorii—another member of the genus—where significant differences were noted regarding spathe texture and inflorescence structure.
Distribution and Habitat
Notably rare, Butia pubispatha has only been documented at its type locality in eastern Paraná since its initial discovery in 2008 along a highway in Jaguariaíva municipality. This species thrives in sunny high-altitude grasslands situated near riverbanks on sandy soils, an environment that contributes to its unique ecological niche.
Cultivation and Conservation Status
As interest in horticulture grows, seeds of Butia pubispatha have become available for sale among collectors and enthusiasts since its description. By at least 2014, some individuals had successfully cultivated this rare species, highlighting its potential ornamental value.
The conservation status of Butia pubispatha remains uncertain; as of 2018, it had not been formally evaluated by the Centro Nacional de Conservação da Flora in Brazil. However, efforts have been made to protect its habitat through inclusion within the geological park Área de Preservação Ambiental da Escarpa Devoniana since much of its surrounding environment has been altered for agricultural purposes such as soya cultivation.
This species is classified among the least studied within Brazilian palms due to its rarity; it was deemed ‘data deficient’ during population assessments conducted in recent studies alongside other rare species like B. witeckii.
Conclusion
In summary, Butia pubispatha represents an intriguing addition to Brazil’s rich biodiversity. As an extremely rare palm endemic to southeastern Brazil’s Paraná state, it showcases unique morphological traits that distinguish it from related species within the Butia genus. Despite being little-known outside specialized botanical circles and facing threats from habitat loss due to agricultural expansion, there exists an opportunity for conservation efforts aimed at preserving this remarkable plant for future generations. Ongoing research will be crucial for understanding its ecology and developing strategies for ensuring its survival in the wild.
Artykuł sporządzony na podstawie: Wikipedia (EN).