Pinanga, Blume (1838: 65), Blume, 1838

Adorador, Jiro T. & Fernando, Edwino S., 2022, Pinanga leonardcoi (Arecaceae), a new species from Mt. Cagua in northeast Luzon, Philippines, Phytotaxa 536 (2), pp. 183-189 : 188

Updated Key to the Urosperma group

1 Fruiting perianth with valvate calyx lobes ..................................................................................................................... P. urosperma

- Fruiting perianth with imbricate calyx lobes...................................................................................................................................... 2

2 Stem clustering, the off-shoots stoloniferous, rachillae very few, just 2–3, fruits spirally arranged throughout the rachillae ............ ........................................................................................................................................................................................ P. leonardcoi

- Stem solitary, rachillae many, 6–21, fruits distichously arranged along rachillae [sometimes becoming seemingly spiral by mutual pressure upon fruit maturation] .......................................................................................................................................................... 3

3 Leaflets glaucous underneath, without microlepidote, rachillae fewer (6–10) .............................................................. P. glaucifolia

- Leaflets not glaucous underneath, with microlepidote, rachillae many (10–21) ............................................................ P. samarana