Aetanthus

Murillo-Serna, Jhon S., Roldán-Palacio, Francisco J., Carmona-Gallego, Isabel & Alzate, Fernando, 2021, A new species of Aetanthus (Loranthaceae) from Colombia with notes on A. engelsii, Candollea 76 (1), pp. 71-76 : 72

Key to the Colombian species of Aetanthus

Adapted from KUIJT (2014)

1. Shoots determinate (each aborting internode forming sympodia) .................................................................... 2

1a. Shoots indeterminate (at least three internodes per innovation) ......................................................................... 8

2. Leaves whorled in mature stems (3 or 4 per node) ...... 3

2a. Leaves paired in mature stems ..................................... 6

3. Leaves in whorls of 4 ..................................... A. engelsii

3a. Leaves in whorls of 3 ................................................... 4

4. Leaves orbicular to obovate; plants from the Sierra Nevada de Santa Marta ................................... A. ovalis

4a. Leaves ovate to lanceolate; plants occurring in the Andes ..................................................................................... 5

5. Leaves lanceolate, ovate or ovate-lanceolate, thin. Secondary venation inconspicuous and not pronounced; anthers c. 15 mm long ............................................... A. trifolius

5a. Leaves ovate, thickened. Secondary venation conspicuous and pronounced; anthers c. 10 mm long ........ A. validus

6. Inflorescence a triple dyad ..................... A. megaphyllus

6a. Inflorescence a double dyad ......................................... 7

7. Leaves sessile ........................................... A. sessilifolius

7a. Leaves petiolate ............................................ A. nodosus

8. Leaves alternate or subopposite ............. A. alternifolius

8a. Leaves whorled (3 per node) ....................................... 9

9. Flowers> 15 cm long; calyculus strikingly dentate; terete young stems ................................................... A. mutisii

9a. Flowers up to 10 cm long; calyculus smooth or finely dentate; young stems 3-ridged ............... A. colombianus