Campylocentrum sect. Campylocentrum, 1906

Pessoa, Edlley & Alves, Marccus, 2018, Taxonomical revision of Campylocentrum sect. Campylocentrum (Orchidaceae, Vandeae, Angraecinae) in Brazil, Phytotaxa 362 (1), pp. 1-20 : 3-4

Key to species of Campylocentrum sect. Campylocentrum from Brazil

1. Inflorescence congest, glabrous; sepals and petals 3-nerved.............................................................................................................2

– Inflorescence lax, hirtellous, minutely papillose to papillose; sepals and petals 1-nerved................................................................5

2. Spur> 12 mm long, patent, the apex acute to obtuse.................................................................... C. huebneri Mansfeld (1928: 382)

– Spur <6 mm long, slightly curved, inflexed or straight, the apex rounded.......................................................................................3

3. Spur <3.5 mm long, shorter than the sepals, inflexed ................................................................................................. C. micranthum

– Spur> 4.8 mm long, as long as or longer than the sepals, slightly curved or straight.......................................................................4

4. Flowers pale green or cream-colored; spur slightly curved ................................................. C. kuntzei Cogn. ex Kuntze (1898: 298)

– Flowers pale orange; spur straight........................................................................................... C. mattogrossense Hoehne (1941: 62)

5. Lip entire, spur ellipsoid or ovoid, inflexed or sigmoid.....................................................................................................................6

– Lip 3-lobed, spur clavate, cylindrical or cylindrical-clavate, curved, slightly curved or straight......................................................7

6. Spur ellipsoid, sigmoid..................................................................................................................... C. hondurense Ames (1923: 37)

– Spur ovoid, inflexed ................................................................................................................... C. steyermarkii Foldats (1968: 316) 7. Spur straight, longer than the sepals.......................................................................................................................... C. calostachyum

– Spur curved or slightly curved, as long as or shorter than the sepals.................................................................................................8

8. Pedicellate ovary and capsules densely hirtellous; spur twice longer than the pedicellate ovary........................................................ ...................................................................................................................................................... C. hirtellum Cogniaux (1906: 521)

– Pedicellate ovary minutely papillose; capsules glabrous; spur shorter to slightly longer than the pedicellate ovary........................9

9. Stem up to 0.7 cm long; sepals <1.6 mm long; spur cylindrical ....................................... C. serranum Pessoa & Alves (2015b: 54)

– Stem up to 25 cm long; sepals> 1.8 mm long; spur clavate to cylindrical-clavate ............................ C. ulaei Cogniaux (1906: 514)