128 THE GENUS PHOEADENDRON 



in 4+2 series : peduncle 4 mm. long : scales rather deeply parted. Fruit 

 subglobose, 4-5 mm. in diameter, retrorsely hairy: sepals pubescent, in- 

 curved. Plate 188. 



Bolivian region ( ? exclusively) on cacti. The type from Bolivia. 



Specimens examined: BOLIVIA. Tunari Mts. at 1300 m. (Kuntze, 

 20, June 1892, the type). Cotana, at 2500 m. (Bucktien, 3156}. 



C. PENNINERVIAE. 



Nerves pinnate from a midrib which usually continues through the 

 leaf but sometimes vanishes below the middle ; never with several equally 

 strong nerves from the base. 



Leaves thick and opaque. 



Stem 4-lined : midrib evanescent. EGGERSIAE. 



Stem ancipital or terete. 



Leaves elongated (1:3-4), dull. UNDULATAE. 



Leaves broad (1:2). 



Spikes very long, Venezuelan. P. polygynum. 



Spikes moderate. Bahamian. NORTHROPIAE. 



Leaves fleshy : stem bluntly square. RUGULOSAE. 



Leaves drying rather leathery or papery. 

 Not or scarcely revolute. 



Midrib evanescent. HEYDEANAE. 



Midrib percurrent. PTERONEURAE. 



Revolute. HEXASTICHAE. 



Leaves herbaceous, dull : stem sharply ancipital. PERUVIANAE. 



39. EGGERSIAE. 



Leaves large, rather thick and dull, evanescently heavily pinnately 

 nerved. Shoots acutely quadrangular. Cataphyls 2 pairs, on the basal 

 joint only. Spikes stout and long. Flowers in 4+2 series. Fruit gran- 

 ular, with widely parted sepals. Andes. 



Leaves ovate. P. Eggersii. 



PHORADENDRON EGGERSII (Urban). 



PJioradendrum Eggersii Urban, Bot. Jahrb. vol. 23. Beibl. 57. p. 10. 1897. 



Scarcely forked, the branches with basal cataphyls only, androgy- 

 nous?. Internodes rather short, stout (3-5x25-50 mm.), nearly smooth, 

 square or 4-keeled, slightly swollen but not compressed at the nodes. 

 Cataphyls a basal pair followed by another more or less fertile pair some 

 10 mm. higher. Leaves very broadly elliptical or ovate, very obtuse, 

 7-11x11-15 cm., abruptly petioled for 15-20 mm., rather thick and dull, 

 obscurely pinnately veined below the middle. Spikes mostly clustered, 



