Cyrtopodium, Brown, 1813

Batista, João A. N. & Medeiros, Alexandre Da Silva, 2022, A new putative natural hybrid of Cyrtopodium (Orchidaceae) from the south coast of Brazil, Phytotaxa 536 (3), pp. 279-286 : 284-285

Key to the Species of Cyrtopodium from the Atlantic Forest domain with fusiform, epigeous pseudobulbs, more than 20 cm in length

1. Plant epiphytic ....................................................................................................................................................................................2

- Plant terrestrial or rupicolous .............................................................................................................................................................3

2. Distance between the expanded lateral lobes of the lip (8–)11–12 mm; width of the median lobe of the lip (4–)5–7 mm................. ........................................................................................................................................................................................ C. palmifrons

- Distance between the expanded lateral lobes of the lip 20–24 mm compr.; width of the median lobe of the lip 12–16 mm .............. ................................................................................................................................................................................................ C. gigas

3. Flowers completely yellow, petals and sepals occasionally yellow-green or brownish, usually without spots or blemishes ............. ............................................................................................................................................................................................................4

- Flowers with red or brown spots or blemishes on a yellowish or greenish background....................................................................5

4. Width of the median lobe of the lip 8–13 mm ...................................................................................................................... C. flavum

- Width of the median lobe of the lip 16–25 mm ........................................................................................................... C. glutiniferum

5. Distance between the expanded lateral lobes of the lip (25–) 29–30 mm; width of the median lobe of the lip (16–) 21–22 mm ........ ................................................................................................................................................................................. C. × intermedium

- Distance between the expanded lateral lobes of the lip 16–23 mm; width of the median lobe of the lip 11–14 mm ........................6

6. Sepals elliptical to narrowly elliptical, (16–) 18–24 mm long, profusely spotted throughout, margins strongly undulate; distance between the expanded lateral lobes of the lip 19–23 mm; lip midlobe margins verrucose; widely distributed in the phytogeographic domains of Caatinga, Cerrado and Atlantic Forest, but absent on the south coast and most of the southern coast............................. ............................................................................................................................................................................................... C. holstii

- Sepals obovate or broadly elliptical, 15–16 mm long, spots concentrated at the base, margins slightly undulate; distance between the expanded lateral lobes of the lip ca. 16 mm; lip midlobe margins slightly verrucose; distribution restricted to the south coast in the state of Santa Catarina ................................................................................................................................... C. × flavopunctatum