Catasetum × yariguii Uribe-Velez & Sauleda (2018a: 1)

Krahl, Dayse Raiane Passos, Schmal, Philippe, Chiron, Guy, Silva, João Batista Fernandes Da, Krahl, Amauri Herbert & Cantuária, Patrick De Castro, 2023, Catasetum × grasineideae (Orchidaceae: Catasetinae), a new nothospecies from Brazilian Amazon and taxonomic notes for the genus, Phytotaxa 594 (2), pp. 89-104 : 99-100

6. Catasetum × yariguii Uribe-Velez & Sauleda (2018a: 1) (pro. sp.), nothosp. nov.

( Figure 6G–H ).

Type:— COLOMBIA. Santander: Cañon del Rio Chicamocha, no date, Jimenez s/n (holotype: HPUJ) .

= Catasetum cucutaense Uribe-Velez & Sauleda (2018b: 1) , syn. nov.

Type:— COLOMBIA. Cucuta: Norte de Santander, near La Esperanza, no date, collector unknown (holotype: HPUJ) .

= Catasetum bolivarii Uribe-Velez & Sauleda (2018c: 1) , syn. nov.

Type:— COLOMBIA. San José de Cucutá : Norte de Santander, near La Esperanza, no date, collector unknown (holotype: HPUJ-29766). = Catasetum pamploanense Salueda (2019: 1) , syn. nov .

Type:— COLOMBIA. Santander: Norte de Santander, near Pamplona , 18 july 2019, collector unknown (holotype: HPUJ) .

Taxonomic Note: —during the years 2018 and 2019 four closely related species were described from Colombia, all from virtually the same locality. The first was C. yariguii Uribe-Velez & Sauleda (2018a: 1) that, in our opinion, resembles C. naso in the lip shape and is sympatric to it ( Govaerts et al. 2022). Then, C. cucutaense Uribe-Velez & Sauleda (2018b: 1) , C. bolivarii Uribe-Velez & Sauleda (2018c: 1) and C. pamploanense Salueda (2019: 1) were successively described, and always compared to each other, with the distinguishing features being rather weak, especially between C. yariguii and C. bolivarii . All this led us to treat them as conspecific, under the oldest name, C. yariguii .

Another fact that caught our attention was the phenotypic plasticity shown by these taxa, which led us to consider them as hybrids between C. lucis P. Ortiz & G. Arango (1994: 29) and C. naso on the basis of habit, flower color and lip shape, intermediate between these two species, both being sympatric to C. yariguii in Colombia ( Govaerts et al. 2022). Moreover, the artificial crossing made by J. Fernández G. produced a plant compatible with the phenotype of C. yariguii and C. bolivarii (see Figure G–H). The other phenotypes should be expressed according to the countless varieties of C. naso .

All these nothotaxa present, in fact, similar features, intermediate between C. lucis and C. naso . The flower colour goes from reddish (mostly similar to C. naso ) to greenish (mainly as in C. lucis ). All of them have a lip presenting some concavity as observed in C. naso (vs. subcordate and convex in C. lucis ). The inside of the lip is protruding on both sides by thick projections that form a transverse wall along the lip (as well as in C. naso ), however these projections can vary in size and shape due to the existence of two obtuse appendages observed in C. lucis . The lip margin can be either smooth (as in C. lucis ) or fimbriate (as in C. naso ). The lip apex can be apiculate as in C. naso or more rounded because C. lucis has a lip apex ending into a fleshy structure. When analyzing the images in the descriptions we can note that all of them present antennae first parallel and becoming slightly divergent at apex as in C. naso (vs. antennae strongly divergent in C. lucis ) (see Lindley 1843b, Lindley & Paxton 1851, Dunsterville & Garay 1961, Ortiz & Arango 1994, Uribe-Velez & Sauleda 2018a,b,c, Salueda 2019). Since the phenotype is unpredictable in hybrids, especially when the parents present different morphological variations (Rieseberg & Ellstrans 1993), we consider as quite acceptable the variations observed in the four discussed taxa.

Figures

FIGURE 6. Hybrid Catasetum. A–B. C. × aripuanense. C. C. × dalastranum. D. C. × fergusonii. E–F. C. × mojuense. G–H. C. × yarigii. Photos A–B, D and G–H by J. Fernández G., C by F. Godoy and E–F by E. Pontes.