Anthurium sect. Pachyneurium, Schott, 1860

Camelo, Mel De Castro, Croat, Thomas B., Coelho, Marcus A. N. & Aylward, Steve, 2021, A new species of ‘ Bird’s Nest’Anthurium sect. Pachyneurium (Araceae) from Brazil, Phytotaxa 523 (3), pp. 229-238 : 237

Key to Anthurium mayoanum and related species of

Anthurium sect. Pachyneurium

1. Cataphylls cucullate and fist-shaped ................................................................................................................................. A. salvinii

– Cataphylls lanceolate ........................................................................................................................................................................ 2

2. Cataphylls with fine fibers; spadix much longer than peduncle; berries red ............................................................... A. plowmanii

– Cataphylls with not fine fibers, variable; spadix shorter than peduncle; berries different colors .................................................... 3

3. Spadix yellowish to greenish at anthesis, cylindrical; berries reddish at the base, purplish at the apex ............................. A. affine

– Spadix not yellowish to greenish at anthesis, colors variable, cylindrical, tapering at the apex; berries reddish-purplish to magenta ............................................................................................................................................................................................. 4

4. Primary lateral veins <10; spadix greenish to tinged of purple, graybrown to brownish; inflorescence erect ..... A. paraguayense

– Primary lateral veins> 10; spadix coral color or unknown; inflorescence pendent ........................................................................ 5

5. Spathe 3 cm long; spadix color unknown, cylindrical, not tapering at the apex, 70 cm long. ................................. A. macrospadix

– Spathe 5 cm long; spadix coral colored, tapered, 10 cm long ..................................................................................... A. mayoanum