Phoradendron 



LORANTHACE^ 



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 internodes. 



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-augled. 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. rubrum. 



Leaves obovate to elliptical-oblong, IJ- 



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. WattU. 



Male unknown, female median joint 



4-8-flowered 4. P. Fid. 



Monoecious 5. P. crenulatuni. 



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. Campbellii. 

 Leaves obovate to narrowly obovate- 



oblong 3. P. trinervium v. 



domin^ense. 

 Flowers in 6 rows 8. P. Grisebachianum. 



§2. Scale-sheaths in all the internodes. 



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



Leaves with principal nerves from the base. 



Flowers in 6 rows 10. P.flavens. 



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

 none in the other internodes. 



1. P. tetrapterum Kr. & Urb. in Engl. Bot. Jahrh. xxiv. 

 35 (1897); branches usually acutely 4-angled or with 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. Symb. Ant. 

 iv. 207. 



Macfadyen\ near Hope Gardens, 800 ft., Harris 1 Fl. Jam. 6393, 6545, 

 6576, 6926. Growing on Phoradendron rtibrum var. gracile, PitJiecolobium 

 duke and Guaztima tomentosa. — Porto Eico, Martinique. 



