106 



TREES OF NORTH AMERICA 



CONSPECTUS OF THE NORTH AMERICAN SPECIES. 



Petioles furnished with stout marginal teeth throughout their entire length; leaves green 

 on both surfaces, their primary divisions extending to the middle, secondary divisions 

 only from 3'-9' long; stems forming large thickets. 1. A. Wrightii (D). 



Petioles furnished with thinner teeth, usually unarmed toward the apex; leaves green or 

 glaucescent on the lower surface, their primary divisions extending nearly to the base, 

 secondary divisions often 10' long or more; stems often prostrate. 2. A. arborescens (D) . 



1. Acoelorraphe Wrightii Becc. 



Leaves 30'-36' in diameter, thin, light green, divided only to the middle, the divisions 



of the primary lobes 3^'-9' long; petioles thin, gradually tapering from the base, 40'-60' 



Fig. 102 



in length, armed throughout with stout straight or incurved teeth. Flowers: spadix 4- 

 6 long; flowers '-' long, with a light chestnut-brown calyx and a pale yellow-green corolla. 

 Fruit j' in diameter. 



A tree with numerous stems, in Florida sometimes 10 metnes high, forming great thickets. 



Distribution. Dade County, Florida, from the rear of Madeira Hummock to Cape; 

 Sable, in swamps of fresh or brackish water at some distance from the coast; also in Cuba 

 and on the Bahamas. 



2. Acoelorraphe arborescens Becc. 

 Serenoa arborescens Sarg. 



Leaves about 2 in diameter, light yellow-green on the upper surface, blue-green or 

 glaucescent on the lower surface, divided nearly to the base into numerous lobes slightlj 

 thickened at the pale yellow midribs and margins; petioles 18'-24' long, armed, excepl 

 toward the apex, with stout flattened curved orange-colored teeth. Flowers: spadi> 



