Pacifigeron, Nesom, 1994

Saldivia, Patricio, Wood, Kenneth R., Orlovich, David A. & Lord, Janice M., 2020, Pacifigeron indivisus (Asteraceae: Astereae), a new species endemic to Rapa, Austral Islands, and a new delimitation of the Celmisia group, Phytotaxa 442 (4), pp. 239-266 : 252

Key to species of Pacifigeron

1. Shrubs, 0.2–1.0 m tall; leaves untoothed, 2–5 × 1.2–2.7 cm; capitulescences of 2–5 capitula; capitula radiate; style of the ray florets shorter than the limb; style of the disc florets bifurcate ..................................................................................................... P. rapensis

– Shrubs or small trees, 1–2 m tall; leaves irregularly serrate to double-serrate or untoothed, (14–)16–21 × (4–) 5–9 cm; capitulescences of 60–80 capitula; capitula disciform; style of the ray florets conspicuously exserted; style of the disc florets not bifurcate............ ............................................................................................................................................................................................ P. indivisus