16 THE GENUS PHOEADENDEON 



Scarcely forked, drying golden yellow, the long thick branches with 

 cataphyls on all joints, dioecious. Internodes long (3-8x100-125 mm.), 

 granular, somewhat hexagonally flattened, dilated below the nodes. Cata- 

 phyls a single pair, about 10 mm. above the base, deltoid, keeled and 

 pointed. Leaves elliptical-ovate, more or less mucroiiately obtuse to 

 emarginate, 4x9 to 10x15 cm., cuneately wing-petioled for 10 mm. Spikes 

 solitary, very long (60 to over 100 mm.), with about 4 thick cylindrical 

 joints often over 100-flowered in about 8 (6-10) series: peduncle gran- 

 ular, 5-10 mm. long. Fruit (immature) elongated, nearly smooth, 3x5 

 mm. : sepals closely inflexed. Plate 235. 



Andean region ( ? exclusively) on Aralia. The type from Peru. 



Specimens examined : PERU. Catani, between Sandia and Chunchus- 

 mayo (Weberbauer, 1288, July 25, 1902, the type). Cucharo (Poep- 

 pig, 1829-30, in the Vienna herbarium) . 



IV. DICHOTOMAE. 



Normally forking at every node, the branches therefore not percur- 

 rent though sometimes ending in a flower-spike. 



Leaves basinerved. 



Venulose above, obscurely nerved beneath. HUALLAGENSES. 



Equally nerved and veiny on both sides, or opaque. 



Small. GARDNERIANAE. 



Moderate or large. 



Coriaceous or moderately thin. 



With terminal spikes in the forks. CYMOSAE. 



Not cymose. P. Jenmani. 



Very large and thick, dimidiate. P. obliquum. 



Leaves penninerved. 

 Thick and flat. 



Obscurely nerved. P. Norfhropiae. 



Evanescently heavy-nerved. P. Eggersii. 



Chartaceous, veiny, often revolute. P. racemosum. 



54. HUALLAGENSES. 



Leaves moderate, acuminately ovate-lanceolate, drying rather thin 

 with the lower surface smooth but heavily basinerved and the upper re- 

 ticulately veiny and more or less venulose. Shoots terete. Cataphyls 

 typically a single pair, nearly basal on all joints, the branches being 

 sometimes percurrent, and sometimes cymosely dichotomous, and rarely 

 without cataphyls on some joints. Flowers in 2 or 4 series. Fruit ovoid, 

 rather rough, with nearly closed sepals. South America. 



Spikes short (20-30 mm.), with short joints. P. Tiuallagense. 



Spikes long (50 mm.), with long joints. P. laxiflorum. 



