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Saturday, May 3rd, 2025
| Time | Event | ||||||
| 2:48p | [Botany • 2022] Grindelia peregrinensis (Asteraceae: Astereae) • A New Species from southern Buenos Aires Province, Argentina
Abstract The genus Grindelia includes ca. 70 species and has a disjunct distribution in North America and central-south South America. Based on field surveys, types, additional specimens, and a literature review, we describe a new species, Grindelia peregrinensis, from Sierra La Peregrina and Sierra La Vigilancia in the orographic Tandilia System of southern Buenos Aires Province, Argentina. Data regarding its geographic distribution, phenology, habitat, conservation, and morphological affinities with related species are provided. Keywords: Biodiversity, endemism, Tandilia System, taxonomy
Malena Sabatino and Leonardo Paz Deble. 2022. Grindelia peregrinensis (Asteraceae: Astereae), A New Species from southern Buenos Aires Province, Argentina. Brittonia. 74; 290–296. DOI: doi.org/10.1007/s12228-022-09706-y [06 May 2022]  | ||||||
| 2:48p | [Botany • 2024] Begonia isadorae (Begoniaceae, sect. Pritzelia) • A New endemic Species from Ilha Grande, an island in southeastern Brazil, with Notes on Leaf Anatomy
Abstract Begonia isadorae is a new species endemic to an island of Brazilian Atlantic Rainforest, a biome rich in endemism and species diversity, and it is described and illustrated herein. Begonia isadorae belongs to B. sect Pritzelia (Klotzsch) A.DC. and it is morphologically similar to B. rubropilosa A.DC. sharing the same leaf blade shape and habit but differs in its puberulous to glabrescent adaxial leaf blades (vs. scabrous), puberulous tepals (vs. squamulose), and ovary with entire placentae (vs. bilamellate). A diagnosis, description, ecological comments, taxonomic and leaf anatomy notes, illustrations, and color photographs are provided. Begonia isadorae is preliminarily classified as Vulnerable (VU) due to its very small populations and restricted distribution. Atlantic Coastal Forest, conservation, endemism, taxonomy, insular region, Eudicots  Eliane de LIMA JACQUES, Mahat ELLIOT FERNANDES PINTO, Ana Luiza BORGES da COSTA FERNANDES, Luiz Ricardo DOS SANTOS TOZIN. 2024. Begonia isadorae (Begoniaceae), A New endemic Species from Ilha Grande, an island in southeastern Brazil, with Notes on Leaf Anatomy. Phytotaxa. 650(3); 236-248. DOI: doi.org/10.11646/phytotaxa.650.3.4 [2024-05-29] https://portal.ufrrj.br/cientista-da-ufr  | ||||||
| 2:48p | [Botany • 2025] Bertolonia crassicaulis (Melastomataceae: Bertolonieae) • A New Species of Bertolonia with thickened stems, a rare feature in Melastomataceae living in dry areas
Abstract Bertolonia crassicaulis is described here as a new species from southeastern areas of the state of Bahia, Brazil. Diagnostic illustrations, field photographs, distribution map, recommended conservation assessment, and a discussion on putative related species based on morphological similarities are provided. This new species can be recognized by the thickened stems in part hidden in the leaf litter and probably with a water storage function, alternate leaves, light green leaf blades with a markedly cordate base, and main veins that are light pink on the abaxial surface. Bertolonia crassicaulis is suggested to be critically endangered (CR). Atlantic Forest, Bahia, Bertolonieae, Critically Endangered, Microendemism, Eudicots
Gessica C.A. BISEWSKI, Lucas F. BACCI, André M. AMORIM, Fabian A. MICHELANGELI and Renato GOLDENBERG. 2025. A New Species of Bertolonia with thickened stems, a rare feature in Melastomataceae living in dry areas. Phytotaxa. 691(1); 63-73. DOI: doi.org/10.11646/phytotaxa.691.1.5 [2025-03-03] | ||||||
| 3:06p | [Botany • 2025] Gastrodia microchila (Orchidaceae: Epidendroideae) • A New Species from Brunei Darussalam
Abstract A new orchid species, Gastrodia microchila is described and illustrated. The species was found in a mixed dipterocarp forest in the Belait district, Brunei Darussalam, northern Borneo in 2024. It is distinct from most Gastrodia species in western Malesia by its small lip and column, and presence of the smooth cushion-like tissue on the inner side of lateral sepals. Gastrodia microchila is only the second species of Gastrodia recorded for Brunei Darussalam and the seventh known species for Borneo. A determination key for all Gastrodia species occurring in western Malesia is also provided. Key words: Borneo, endemic species, holomycotrophic orchid, Malesia, mycoheterotrophy, tribe Gastrodieae
Gastrodia microchila Hroneš, sp. nov. Diagnosis. Gastrodia microchila is similar to G. holttumii Carr from Peninsular Malaysia but differs by narrower cylindrical rhizome without distinct nodes (vs. robust, distinctly noded), flowers 8.5–9.0 mm wide, narrowly open (vs. 9.0–11.0 mm wide, widely open), free part of lateral and dorsal sepals oblong triangular to broadly triangular, up to 4.5 × 5.0 mm (vs. elliptic to oblong elliptic, 6.0–7.0 × 3.0–5.0 mm), free part of petals indistinct, ca. 0.7 × 0.6 mm, elliptic (vs. 1.0–2.0 × 0.7–1.0 mm, ovate), hypochile 2.0 × 2.0 mm, broadly oblong-orbicular (vs. 2.0 × 1.5 mm, oblong-ovate) and stelidia longer than anther cap (vs. subequal to anther cap). Etymology. The name is derived from the Latin micro- = small and -chilum = lip, referring to the size of the lip, which is among the smallest in Gastrodia species in western Malesia. Michal Hroneš, Michal Sochor, Alena Uvírová, Azlan bin Pandai, Salwana Jaafar, Rahayu S. Sukri and Martin Dančák. 2025. Gastrodia microchila (Orchidaceae, Epidendroideae), A New Species from Brunei Darussalam. PhytoKeys. 256: 1-11. DOI: doi.org/10.3897/phytokeys.256.149020 |
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