Praxelis (Abreu, 2015)

Abreu, Vanessa Holanda Righetti De & Esteves, Roberto Lourenço, 2017, A new species of the Cerrado in Brazil, Phytotaxa 303 (1), pp. 77-83 : 78

Key to species of Praxelis in Brazil

1. Involucral bracts persistent................................................................................................................................................................. 2

– Involucral bracts deciduous................................................................................................................................................................ 7

2. Xylopodium present ........................................................................................................................................................................... 3

– Xylopodium absent............................................................................................................................................................................. 5

3. Branches decumbent; leaves subcoriaceous.................................................................................................................. P. decumbens

– Branches erect; leaves membranous................................................................................................................................................... 4

4. Branches pubescent; leaves elliptic, trinervate.............................................................................................................. P. grandiflora

– Branches hirsute; leaves linear, uninervate ........................................................................................................... P. sanctopaulensis

5. Leaves linear, verticillate, margins entire, revolute...................................................................................................... P. macrocarpa

– Leaves linear, opposite or alternate, margins serrate.......................................................................................................................... 6

6. Branches cylindrical, hirsute; leaves opposite..................................................................................................................... P. insignis

– Branches hexagonal to pentagonal, glabrous; leaves alternate ............................................................................................. P. splettii

7. Inflorescence of single capitula .......................................................................................................................................................... 8

– Inflorescence of aggregated capitula ................................................................................................................................................ 14

8. Branches glabrescent .......................................................................................................................................................................... 9

– Branches hirsute ............................................................................................................................................................................... 10

9. Leaves verticillate, uninervate, linear, glabrescent, margins entire, revolute....................................................... ............ P. capillaris

– Leaves opposite, trinervate, ovate, pubescent, margins serrate................................................................................. P. odontodactyla

10. Leaves petiolate.................................................................................................................................................................... P. diffusa

– Leaves sessile ................................................................................................................................................................................... 11

11. Leaves linear or ovate....................................................................................................................................................................... 12

– Leaves asymmetric or elliptical........................................................................................................................................................ 13

12. Leaves linear, uninervate .................................................................................................................................................... P. basifolia

– Leaves ovate, trinervate.................................................................................................................................................. P. kleinioides

13. Leaves asymmetrical, pubescent ....................................................................................................................................... P. missiona

– Leaves elliptic, glabrescent ................................................................................................................................................... P. ostenii

14. Branches dichotomous, very long, with many levels of branching; capitula distantly placed; leaves linear, uninervate, reduced at branches; involucres cylindrical................................................................................................................................... P. asperulacea

– Branches not dichotomous, short, with few levels of branching; capitula closely aggregated; leaves ovate, trinervate, welldeveloped at branches; involucres campanulate............................................................................................................. P. clematidea