Calea, L.

Bueno, Vinicius R., Gostel, Morgan R. & Heiden, Gustavo, 2023, The spiraling story of Tyleropappus and a new name for Calea (Asteraceae: Neurolaeneae) from Venezuela, Phytotaxa 622 (1), pp. 75-84 : 80-81

KEY TO THE SPECIES OF THE NANA CLADE OF CALEA

1. Capitula radiate ................................................................................................................................................................................ 2.

– Capitula discoid ............................................................................................................................................................................... 4.

2. Petioles absent, margins entire; involucres 3-seriate; ray corolla obovate, disc florets corolla 3.5–3.8 mm long ....... C. coridifolia

– Petioles present, margins serrate; involucres 4-seriate; ray corolla oblong, disc florets corolla 4–4.75 mm long ......................... 3.

3. Petioles 0.4–1.1 mm long, leaf blade 3.2–4.5 mm long, abaxial surface glabrous; peduncle 0.6–1 cm long, involucres 5.5–5.8 mm long; pappus 10–12 scales ..................................................................................................................................................... C. nana

– Petioles 1.5–5.3 mm long, leaf blade 1.1–2.7 mm long, abaxial surface glandular-punctate; peduncle 1.8–9.6 cm long, involucres 7–8.1 mm long; pappus 20–22 scales ............................................................................................................................... C. saxatilis

4. Leaves spirally alternate; involucres 5–6.7 mm wide; corolla glandular-punctate; cypselae hirsute ............................... C. spiralis

– Leaves decussate; involucres 2.5–3 mm wide; corolla glabrous; cypselae glabrous................................................... C. linearifolia