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| Doselia A.Orejuela & Särkinen (A, B) D. epifita (S.Knapp) A.Orejuela & Särkinen, (C) D. galilensis A.Orejuela & Villanueva,(D) D. huilensis (A.Orejuela & J.M.Vélez) A.Orejuela & Särkinen, (F-G) D. lopezii (Hunz.) A.Orejuela & Särkinen in Orejuela, Villanueva, ... et Särkinen, 2022. |
Abstract
A new genus, Doselia A.Orejuela & Särkinen, gen. nov., is described in the tribe Solandreae (Solanaceae) consisting of four species of hemiepiphytic lianas endemic to the premontane forests of the Colombian and Ecuadorian Andes. The genus is distinguished based on the membranous leaves, usually sparsely pubescent with eglandular simple trichomes, pseudo-verticillate leaf arrangement, and elongated, pendulous, and few-flowered inflorescences with showy flowers and conical fruits. Three new combinations are made to transfer species to the new genus previously described as part of the polyphyletic genus Markea Rich. (Doselia epifita (S.Knapp) A.Orejuela & Särkinen, comb. nov., D. huilensis (A.Orejuela & J.M.Vélez) A.Orejuela & Särkinen, comb. nov. and D. lopezii (Hunz.) A.Orejuela & Särkinen, comb. nov.). One new species is described from the western slopes of the eastern cordillera of the Colombian Andes, known only from three localities in the Boyacá, Santander, and Tolima departments (Doselia galilensis A.Orejuela & Villanueva, sp. nov.). The new species is unique in the genus in having glabrescent adult leaves, green-purplish calyces and long, greenish-white, infundibuliform corollas with delicate purplish veins and large lobes tinged with purple, and pubescent styles. Here we provide a revision of Doselia with a distribution map of all species, an identification key, photographs, preliminary conservation assessments, and line drawings of all four species.
Keywords: Colombia, Doselia, Ecuador, endemism, hemiepiphytes, Juanulloeae, lianas, Markea, new species, Solandreae
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| Doselia A.Orejuela & Särkinen A pseudoverticillate leaves in D. epifita B infundibuliform cream-purplish corolla of D. epifita C infundibuliform greenish-white corolla with subtle purple veins of D. galilensis D tubular-campanulate yellowish-green corolla of D. huilensis with strong purple-tinged reticulation along major and minor veins E developing fruit in D. huilensis F hypocrateriform orange corollas in D. lopezii G pendent long flowering branches in D. lopezii with clustered leaves and orange corollas in frontal view H developing fruit in D. lopezii with a nectariferous disc at the base (Vouchers: A Orozco et al. 3876 (COL), B no voucher, C Corrales et al. 917 (JBB, TOLI), D Coral 34 (HEEA), E Orejuela & Vélez-Puerta 112 (COL) F Orejuela et al. 727 (JBB) G no voucher H Orejuela & Calderon 170 (COL): photos by Alistair Hay, Andreas Kay, Andrés Orejuela, Boris Villanueva, Brayan Coral, and Eduardo Calderon. |
Doselia A.Orejuela & Särkinen, gen. nov.
Diagnosis: Like Solandra Sw. and Schultesianthus Hunz., but differing from both in having membranous leaves (vs. chartaceous or coriaceous), lacking glandular trichomes, having pendulous inflorescences with long slender peduncles (vs. solitary flowers or short erect inflorescences with thick woody peduncles), distally winged pedicels, and actinomorphic corollas (vs. weakly zygomorphic); differing from Solandra in its smaller corollas (8.5–15 cm vs. 15–40 cm long), flowers borne in groups (vs. solitary), straight filaments and styles (vs. strongly curved and declinate), and 2-locular ovaries (vs. 4-locular); differing from Schultesianthus Hunz. in the chartaceous fruiting calyx with visible venation (vs. a thick, shiny and coriaceous fruiting calyx with no visible venation).
Type species: Doselia lopezii (Hunz.) A.Orejuela & Särkinen comb. nov.
(basionym Markea lopezii Hunz.)
Etymology: The generic name Doselia is derived from the Spanish word “dosel”, meaning canopy. It refers to the hemiepiphytic lianescent habit of all species of Doselia, with branches rising high up to the canopy to the top of tree crowns. The plants can be challenging to see because of their position on top of the tree canopy unless the plants have their showy pendulous flowers.
Distribution: (Fig. 2). Mid-elevation moist Andean forests from 500 to 2,300 m in Ecuador (Provinces of Morona Santiago, Napo, Pastaza) and Colombia (Departments of Antioquia, Boyacá, Caldas, Caquetá, Huila, Putumayo, Risaralda, Santander, Tolima, Valle del Cauca).
Andrés Orejuela, Boris Villanueva, Clara Inés Orozco, Sandra Knapp and Tiina Särkinen. 2022. Monograph of Doselia (Solanaceae), A New Hemiepiphytic Genus endemic to the northern Andes. PhytoKeys. 202: 73-96. DOI: 10.3897/phytokeys.202.82101
Resumen: Un nuevo género, Doselia A.Orejuela & Särkinen, gen. nov., es descrito en la tribu Solandreae (Solanaceae), conformado por cuatro especies de lianas hemiepífitas endémicas de los bosques premontanos de los Andes de Colombia y Ecuador. El género se distingue por sus hojas membranáceas con tricomas simples no glandulares, el arreglo pseudoverticilado de las hojas y sus inflorescencias paucifloras, largo pedunculadas y péndulas, flores vistosas y frutos cónicos. Se proponen tres nuevas combinaciones para acomodar especies previamente descritas en el polifilético género Markea Rich. (Doselia epifita (S.Knapp) A.Orejuela & Särkinen, comb. nov., D. huilensis (A.Orejuela & J.M.Vélez) A.Orejuela & Särkinen, comb. nov. and D. lopezii (Hunz.) A.Orejuela & Särkinen, comb. nov.) Una nueva especie es descrita aquí proveniente de la vertiente occidental de la cordillera Oriental de los Andes colombianos, y conocida únicamente de tres localidades en los departamentos de Boyacá, Santander y Tolima (Doselia galilensis A.Orejuela & Villanueva, sp. nov.). La nueva especie se caracteriza por sus hojas glabrescentes cuando adultas, cáliz verde-púrpura, corolas infundibuliformes grandes, blanco-verdosas con una reticulación fina de venas púrpuras, lóbulos corolinos grandes y teñidos de púrpura en su lado ventral y estilos pubescentes. El nuevo género es formalmente descrito incluyendo un mapa de distribución, una clave taxonómica y fotografías e ilustraciones para sus cuatro especies.
Palabras clave: Colombia, Doselia, Ecuador, endemismo, hemiepífitas, Juanulloeae, lianas, Markea, nuevas especies, Solandreae
