Browsing by Autor "Lou Jost"

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A COLORFUL NEW SPECIES OF NEOOREOPHILUS (ORCHIDACEAE: PLEUROTHALLIDINAE) FROM THE EASTERN ANDES OF COLOMBIA AND ECUADOR
(Universidad Autónoma del Estado de México, 2015) Sebastián Vieira-Uribe; Lou Jost
"A new species of Neooreophilus from the eastern Andes of Colombia and Ecuador is described and illustrated. Neooreophilus chaoae is related to a group of species that includes N. cordilabius, N. chelosepalus and N. werneri characterized by having an obovate, pubescent dorsal sepal and spread or reflexed, non-pubescent lateral sepals ending with an apiculum. The new species can be distinguished by its narrowly triangular lateral sepals and its lip with lateral lobes not extending beyond the column. Notes about its natural habitat and conservation status are also given."
A large new species of Passiflora, supersect. Laurifolia, ser. Quadrangulares (Passifloraceae) from the sub-Amazonian forests of Ecuador, with notes on its taxonomic alliance and distribution
(Q15088586, 2023) J.R. KUETHE; Kabir Montesinos; HENRY X. GARZÓN-SUÁREZ; Lou Jost
We here describe and illustrate Passiflora yolandae, a new species of Passiflora subgenus Passiflora, ser. Quadrangulares, from east-central Ecuador, and discuss its morphology, phenology, distribution, and relationships with other closely related species. This species is most notable for its unusual pendent inflorescence, with the flowers borne on relatively long and slender peduncles, with which it is readily different from its nearest related species. The flower buds, during the early stages of development, are nearly perfectly spherical. Literature studies have shown this plant to be found and collected during previous surveys; however, the sterile condition of those specimens never warranted it the recognition as a new species. We evaluate its conservation status as Endangered. An identification key to the species of Passiflora ser. Quadrangulares is provided.
A showy new Platystele (Pleurothallidinae: Orchidaceae) from northwest Ecuador
(Lankester Botanical Garden, 2017) Lou Jost; Gabriel A. Iturralde
Resumen. Se describe una nueva especie de Platystele (Pleurothallidinae: Orchidaceae) de los bosques piemontanos de la provincia de Carchi en el noroccidente de Ecuador. Esta especie presenta flores relativamente grandes en relación a la mayoría de las especies del género, cuyas caudas de los sépalos son largas y delgadas. Es similar a Platystele caudatisepala pero se distingue de esa especie por sus sépalos laterales parcialmente connados, el labio convexo con la punta y márgenes reflexos, los pétalos deflexos, a veces tocando sus puntas hacia atrás de la flor, los sépalos con márgenes recurvados y las hojas largamente pecioladas. Abstract. A new species of Platystele (Pleurothallidinae: Orchidaceae) is described from foothill forest in the province of Carchi in northwestern Ecuador. The species has relatively large flowers for the genus, with long slender sepaline tails. It resembles Platystele caudatisepala, but is distinguished from that species by the partially connate lateral sepals, the convex lip with reflexed tip and margins, the deflexed petals, sometimes with their tips touching behind the flower, the sepals with recurved margins, and the leaves long-petiolate.
Bomarea pastazensis (Alstroemeriaceae), an exceptionally small new species from the eastern Andean slopes of Ecuador
(2026) John L. Clark; Alisson Fierro-Minda; Nolan Exe; Mia Johnson; Carrie M. Tribble; Lou Jost
Bomarea pastazensis (Alstroemeriaceae), an exceptionally small new species from the eastern Andean slopes of Ecuador
(Pensoft Publishers, 2023) John L. Clark; Alisson Fierro-Minda; Nolan Exe; Mia Johnson; Carrie M. Tribble; Lou Jost
Recent field research on the eastern slopes of the Andes resulted in the discovery of a new species of <i>Bomarea</i> from the Cerro Candelaria Reserve in the Tungurahua province of Ecuador. <i>Bomareapastazensis</i> is the second smallest species in the genus and differs from the smallest by the presence of glutinous trichomes on the ovary, glabrous sepals, and greenish-yellow petals with purple spots. Based on IUCN guidelines, a preliminary conservation status is assigned as Vulnerable (VU).
Four new Teagueia (Orchidaceae: Pleurothallidinae) from the upper Río Pastaza watershed of east-central Ecuador
(Lankester Botanical Garden, 2017) Lou Jost; Anderson Shepard
El género Teagueia, una vez considerado como un género menor con muy pocas especies, ha experimentado una sorprendente radiación evolutiva de alta diversidad en la cuenca alta del Río Pastaza ubicada en los Andes orientales del Ecuador. Todos los miembros de esta radiación local comparten un habito largo-reptante, en contraste con el resto de las especies del género. Seis especies de esta radiación local fueron descritas anteriormente; aqui se describe cuatro especies adicionales. Cada una de las cuatro especies nuevas se distingue por la forma particular de sus labelo, diferencias en los tamaños de sus flores, y diferencias en las textura de sus hojas. Todas las especies nuevas, al igual que las otras de esta radiación, tienen distribuciones extremadamente reducidas.
New circumscriptions add two northern Andean species to Kohleria (Gesneriaceae)
(2026) John L. Clark; Lou Jost
New circumscriptions add two northern Andean species to Kohleria (Gesneriaceae)
(2026) John L. Clark; Lou Jost
Studies in Neotropical Araliaceae. IX. Four New Species of Sciodaphyllum from the Cordillera Abitagua, Eastern Andes of Ecuador
(Missouri Botanical Garden Press, 2021) David Neill; Porter P. Lowry; Gregory M. Plunkett; M. Marcela Mora; Efrén Merino; Mercedes Asanza; Lou Jost
Following the recent resurrection of Sciodaphyllum P. Browne (Araliaceae) to accommodate the majority of Neotropical species formerly included in Schefflera J. R. Forst. & G. Forst., we have begun to describe the many new members of this genus documented during field and herbarium studies conducted over the past several years. Here we describe and illustrate four new hemi-epiphytic species of Sciodaphyllum from a small area of the eastern Andes in central Ecuador: the western slopes of the Cordillera Abitagua in canton Baños, Tungurahua Province, in the buffer zone of Llanganates National Park. The four new species described, all collected within a few days in an area of less than 10 km² and not known from any other locality, are S. merinoi D. A. Neill, G. M. Plunkett, Lowry & M. M. Mora, S. purocafeanum G. M. Plunkett, M. M. Mora, D. A. Neill & Lowry, S. recaldiorum Lowry, G. M. Plunkett, M. M. Mora & D. A. Neill, and S. zunacense M. M. Mora, Lowry, G. M. Plunkett & D. A. Neill. The conservation status of all four species is assessed as Vulnerable (VU D2) according to the IUCN Red List criteria.
The Genus Vanilla (Orchidaceae) in South America—Bolivia, Colombia, Ecuador, and Peru: An Annotated Checklist with a New Species
(Missouri Botanical Garden, 2025) Alexander Damián; Adam P. Karremans; Andrés Alberto Barona-Colmenares; Gabriel A. Iturralde; Álvaro J. Pérez; Wilfrido De la Cruz; Lou Jost; Henry X. Garzón; David Villalba-Vargas; Freddy S. Zenteno-Ruíz
The diversity of Vanilla Mill. in Andean South American countries remains significantly understudied, highlighting the urgent need for a robust taxonomic framework as a foundation for future biogeographic, monographic, phylogenetic, and ecological research. Drawing on extensive herbarium studies and fieldwork conducted by the authors over the past decade, we present a curated checklist of this economically important genus in South America, focused on the Andean countries of Bolivia, Colombia, Ecuador, and Peru. Our review records 31 Vanilla species across the four countries, with Colombia emerging as the most species rich, followed by Peru, Ecuador, and Bolivia. Among this diversity, we identified 25 species of potential interest as crop wild relatives of the globally cultivated V. planifolia Andrews. Moreover, we report several species not previously documented in our study area, including a new species from Ecuador, which we describe here as V. sekut Damián, Garzón & Bentley. As part of our extensive herbarium and literature revision, we also designate six lectotypes, one neotype, and four epitypes. This checklist provides a critical baseline for future monographic and evolutionary studies on Vanilla in South America, offering valuable insights into its biodiversity and potential for agricultural and ecological applications.
Two new species of Meriania (Melastomataceae) from eastern Ecuador
(Q15088586, 2020) Diana Fernández‐Fernández; Lou Jost; Agnes S. Dellinger
We describe two new species of Meriania (Melastomataceae), Meriania ardyae from Llanganates National Park and Meriania zunacensis from the Río Zuñac Reserve in Ecuador. Meriania ardyae is characterized by dark crimson petals, hypanthium and calyx with a dark purple coloration, young branches and internodes covered with a dense pubescence of violet-black hirsute trichomes and slightly dimorphic stamens. Meriania zunacensis is distinguished by conspicuous interpetiolar flaps, inflorescences with glomerulate flower clusters, large flowers with magenta petals, isomorphic stamens, and a fleshy, strongly curved style.