Phoradendron LOKAXTIIACE.E 95 



1. Scale-sheaths {i.e. pairs of scales more or 

 less united at the base to form a sheath) only 

 in the lowest internode of a branch, none in 

 the other intemodes. 

 Flowers in 4 rows, besides two odd at the top 

 of the joint, forming a fifth and sixth row. 

 Berries not granulate above. 



Branches usually acutely 4-angled or 

 even slightly winged. Joints 14-34- 



flowered. Spikes 4-9 cm. 1 1. P. tetrapterum. 



Branches 4-angled. Joints 6-18-flowered. 

 Spikes 7-2-5 cm. 1. 

 Leaves lanceolate-linear to oblong-lan- 

 ceolate, 4-10 times longer than 



broad 2. P. ruhrum. 



Leaves obovate to elliptical-oblong, 1^- 



3 times longer than broad 3. P. trinervium. 



Branches terete or the younger more or 

 less compressed or 2-edged or even 

 somewhat 4-angled. 

 Dioecious 



Male joints 10-14-flowered, female 



2-fiowered 7. P. Wattii. 



Male unknown, female median joint 



4-8-flowered 4. P. Fici. 



Monoecious 5. P. crenulatum. 



Berries, when young, granulate above 2. P. rubrum v. gracile. 



Flowers (female) in 2 rows, 2 in each joint. 

 Leaves narrowed somewhat equally above 

 and below. 

 Younger branches terete or obtuse- 

 angled. Leaves leathery 6. P. Wattii. 



Younger branches acute-angled or 2- 



edged. Leaves somewhat thick-papery 7. P. Ccnnpbellii. 

 Leaves obovate to narrowly obovate- 



oblong 3. P. trinerviinn v. 



domingense. 

 Flowers in 6 rows 8. P. Grischachiamim. 



2. Scale-sheaths in all the internodes. 



Leaves penninerved. Flowers in 4 rows 9. P. latifoliuni. 



Leaver with principal nerves from the base. 



Flowers in 6 rows 10. P. ffavens. 



1. Scale-sheaths only in the lowest internode of a branch, 

 none in the other internodes. 



1. P. tetrapterum Kr. & TJrh. in Engl. Bot. Julirh. xxiv. 

 35 (1897); branches usually acutely 4-angled or Avith narrow 

 wings at the 4 angles ; leaves elliptical-oblong, oblong-lanceolate, 

 obovate, or obovate-oblong, often oblique ; spikes 4-9 cm. 1. ; 

 flowers in 4 rows, rarely 5 (besides 2 odd, at top of inter- 

 node), 12-32 in each joint; berries smooth. Urb. Sijmh. Ant. 

 iv. 207. 



Macfadycnl near Hope Gardens, 800 ft., Harris ! Fl. Jam. 6393, 6545, 

 6576, 6926. Growing on Plioradeyidroji rubrum var. gracile, Pithccolobium 

 dulcc and Guazuma tomentosa. Porto liico, INIartiuique. 



