Dendropemon

Caraballo-Ortiz, Marcos A. & Carlo, Tomás A., 2013, Resurrection of Dendropemon sintenisii (Loranthaceae): an endemic mistletoe from Puerto Rico, Phytotaxa 82 (1), pp. 1-6 : 2-3

Key to the species of Dendropemon in Puerto Rico

1. Young stem internodes furfuraceous ............................................................................................................................ 2

- Young stems internodes glabrous ................................................................................................................................ 3

2. Internodes terete, brown-furfuraceous; peduncle at least half of the total inflorescence length; monads 2–6 pairs clustered on the distal part of inflorescence; fruits red or orange with a black tip, banded (black tip, red in middle, dark base) or completely black with faint red near base.... ......................................................... Dendropemon bicolor

- Internodes keeled or quadrangular, white-furfuraceous; peduncle less than half the total inflorescence length; monads 4–8 pairs spreading along the inflorescence; fruits dull black ................................... Dendropemon caribaeus

3. Internodes terete............................................................................................................................................................ 4

- Internodes compressed, keeled or quadrangular .......................................................................................................... 5

4. Inflorescence axis glabrous; pedicels 3–6 mm long; bracts and bracteoles without evident nails; leaves narrowly elliptic, 0.5–1.0 cm wide; fruits shiny black ........................................................................... Dendropemon purpureus

- Inflorescence axis white-furfuraceous; pedicels 1 mm long; bracts and bracteoles with evident nails; leaves broadly elliptic or rounded, (1.7–) 2.0–3.0 (– 3.5) cm wide; fruits red with a black tip ........................ Dendropemon sintenisii

5. Leaves narrowly elliptic, 0.5–1.0 cm wide ............................................................................ Dendropemon purpureus

- Leaves broadly elliptic, obovate or rounded, 1.5–3.5 cm wide .................................................................................... 6

6. Internodes strongly quadrangular; monads 45–90° from the inflorescence axis; fruits dull black ............................... ................................................................................................................................................. Dendropemon caribaeus

- Internodes compressed; monads erect and nearly parallel to the inflorescence axis; fruits red with a black tip .......... .................................................................................................................................................. Dendropemon sintenisii