Catasetum × mojuense Oliveira & Silva (1998: 110)

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 : 98-99

4. Catasetum × mojuense Oliveira & Silva (1998: 110) (pro. Sp.), nothosp. nov.

( Figure 6E–F ).

Type:— BRAZIL. Pará: Mojú , 13 june 1996, J.B.F. da Silva 562 (holotype: MG-150477!) .

Taxonomic Note: —this is another taxon proven to be a natural hybrid. Artificial crossing and germination have been carried out by E. Pontes between C. ciliatum Barbosa-Rodrigues (1877: 130) and C. macrocarpum Kunth (1822: 331) . As for other hybrids this one may show, in any event, a large morphological variability ( Figure 6E–F ) linked to the variations that C. macrocarpum may present according to the different populations that we can find. Catasetum macrocarpum has an extensive geographical distribution and it occurs, as C. ciliatum , in the state of Pará in which C. × mojuense was found. This, as well as the extremely rare records (only two—see Oliveira & Silva 1998 and Barbarena et al. 2020), strengthen its status of natural hybrid.

We can note that C. × mojuense presents flowers with the lip turned upwards (as in C. ciliatum and C. macrocarpum ), a lip deep and sac-shaped (mainly as in C. ciliatum ), trilobed (as in C. macrocarpum ), with lateral lobes erect and slightly fimbriate (as in C. ciliatum ) and a midlobe apiculate (as in C. macrocarpum ). Besides the antennae traits are intermediate: they are not very developed, and crossed, whereas they are absent in C. ciliatum and well developed, asymmetrical and crossed in C. macrocarpum (see Oliveira & Silva 1998, Barbarena et al. 2020, Petini-Benelli 2022).

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.