Cohniella cebolleta (Jacquin, 1760) Christenson, 1999

Sambin, Aurélien & Chiron, Guy R., 2017, Critical study of the Cohniella (Oncidiinae, Orchidaceae) of French Guiana, Phytotaxa 323 (1), pp. 61-68 : 67

Key to the species of the Cohniella cebolleta group The key proposed below is that of Cetzal-Ix et al. (2013a), amended accordingly.

1. Callus of the lip lacking platform and proximal teeth, plant from the state of Amazonas in the south of Venezuela........ C. croizatii

- Callus of the lip with a platform.........................................................................................................................................................2

2. Callus 3-partite, rarely 1-partite, without proximal teeth and more rarely distal teeth, platform transversally obovate, plant endemic to French Guiana.......................................................................................................................................................... C. cayennensis

- Callus 5-partite...................................................................................................................................................................................3

3. Flowers more than 31 mm diameter, midlobe 14–16 × 18–24 mm, central part of the callus platform with two globular teeth, plant endemic to eastern Venezuela................................................................................................................................. C. macrocebolleta

- Flowers less than 25 mm diameter, midlobe 5–10 × 8–15 mm, central part of the platform smooth................................................4

4. Side lobes of the lip narrowly elliptical (1.8–2.5 mm wide), callus with 2 distal teeth partially separated from the median keel, plant endemic to the Lesser Antilles.......................................................................................................................................... C. juncifolia

- Side lobes oblong, rounded or subquadrangular (3,5–5,0 [7,0] mm wide), callus with 2 distal teeth fully connate to the median keel and giving the appearance of one unit................................................................................................................................................5

5. Flowers 16–19 mm diameter, distal teeth of the callus as long as the proximal teeth, plants from southern Venezuela, Guyana and Suriname....................................................................................................................................................................... C. ultrajectina

- Flowers 20–25 mm diameter, distal teeth of callus twice smaller than proximal teeth, plants from northern Colombia and northern Venezuela.......................................................................................................................................................................... C. cebolleta