Praxelis, Cassini, 1826

Teles, Aristônio M., Viana, Pedro L. & Esteves, Roberto L., 2016, Taxonomic novelties in Praxelis (Asteraceae, Eupatorieae): a new species and a new combination, Phytotaxa 278 (1), pp. 48-54 : 53

Key to the species of Praxelis in Minas Gerais (according to BFG 2015)

1. Leaf blade up to 5 mm wide ............................................................................................................................................................ 2

– Leaf blade wider than 5 mm ............................................................................................................................................................. 3

2. Leaves with linear blade, pseudowhorled by development of axillary bud; involucre turbinate; capitula arranged in corymbiform cymes .............................................................................................................................................................................. P. capillaris

– Leaves with oblanceolate blade, opposite; involucre campanulate; capitula solitary ....................................................... P. insignis

3. Capitula with more than 40 florets ................................................................................................................................................... 4

– Capitula with until 40 florets ............................................................................................................................................................ 5

4. Stem leafy throughout ...................................................................................................................................................................... 6

– Stem leafy basally in a rosette .......................................................................................................................................... P. basifolia

5. Stem erect; peduncles 0.5–3.8 cm long; leaves petiolate ................................................................................................................. 9

– Stem prostrate; peduncles 5–10 cm long; leaves sessile .............................................................................................. P. kleinioides

6. Involucre turbinate; capitula arranged in corymbiform cymes ........................................................................................................ 7

– Involucre campanulate; capitula solitary .......................................................................................................................................... 8

7. Capitula arranged in congested corymbiform cymes, peduncles 0.2–3 cm long ......................................................... P. clematidea

– Capitula arranged in lax corymbiform cymes, peduncles 3.5–5 cm long ............................................................ P. sanctopaulensis

8. Stem decumbent; leaves with blade widely elliptic to orbicular; involucre 7–8 mm long; involucral bracts persistent .................... ....................................................................................................................................................................................... P. decumbens

– Stem erect; leaves with blade lanceolate to elliptic; involucre 10–12 mm long; involucral bracts deciduous ........... P. grandiflora

9. Capitula solitary .................................................................................................................................................................. P. minima

– Capitula arranged in corymbiform cymes ...................................................................................................................................... 10

10. Subshrubs, ca. 1 m tall ......................................................................................................................................................... P. diffusa

– Herbs, 15–40 cm tall ............................................................................................................................................................ P. ostenii