Catasetum, Richard ex Kunth, 1822

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 : 94

Identification key to the Catasetum natural hybrids of the Amazonas state, Brazilian

1. Lip ≤ 3 × 3 cm ....................................................................................................................................................................................2

2. Leaves elliptical; leaf lamina patent or erect.................................................................................................................. C. × louiseae

2’. Leaves linear-lanceolate; pending leaf lamina ........................................................................................................ C. × roseo-album

1’. Lip ≥ 3.1 × 3.1 cm ..............................................................................................................................................................................3

3. Flowers not resupinate (lip facing up)..................................................................................................................... C. × grasineideae

3’. Flowers resupinate (lip facing down).................................................................................................................................................4

4. Lip rounded and entire; lip margin ciliate; antennae short (not touching the column base), symmetrical and parallel....................... ...................................................................................................................................................................................... C. × issanense

4’. Lip trilobed; lip margin lightly denticulate; antennae long, asymmetrical and crossed.............................................. C. × tapiriceps