Calea divaricata

Silva, Mizalene Silva Da, Bueno, Vinicius Resende, Scatigna, André Vito & Marinho, Lucas Cardoso, 2025, Calea breviflora (Asteraceae): a new species endemic to white sand ecosystems of easternmost Amazon, Maranhão, Brazil, Phytotaxa 682 (1), pp. 91-100 : 97

Key to the species of the Calea divaricata clade

1. Leaf apex rounded or obtuse, adaxial leaf surface glandular-punctate; ray florets corolla 7–8 mm ............................... C. divaricata

- Leaf apex acute, adaxial leaf surface eglandular; ray florets corolla 2.8–4.3 mm .............................................................................2

2. Petiole 0.6–0.7 mm long; 7–14 disc florets per capitulum; cypselae 1.8–3 mm long..................................................... C. breviflora

- Petiole 1.3–4.2 mm long; 18–20 disc florets per capitulum; cypselae 3.25–3.5 mm long............................................... C. caleoides