192 Key to the System of 



flower-headlets small, in short racemes ; fruit elliptic- or 

 broad-linear, flat ; valves thin ; seeds almost completely 

 surrounded in a double line by the dark-brown funicle. 



A. amoena. 



Flowers many in each headlet ... ... 922 



922. Funicle bright-red. 



Shrubby or finally arboreous ; phyllodia of thick texture, 

 from narrow-elliptical to elongate- or lanceolar- linear, 

 dull-green, almost straight, blunt, their secondary venules 

 faint ; racemes short or sometimes reduced to two or 

 solitary flower-headlets ; fruit linear or narrow-elliptical, 

 generally constricted between the seeds, its valves hard ; 

 funicle tortuous, clasping only the lower portion of the 

 seed. A. salicina. 



Funicle pale or less often brownish-black ... ... 923 



923. Fruit broad. 



Finally arboreous ; phyllodia firm, from elliptic- to elongate- 

 lanceolar, often curved, with an additional short main- 

 venule diverging from the base to a marginal supra-basal 

 gland ; secondary venules pennately spreading ; racemes 

 sometimes paniculated ; flower-stalks when young often 

 densely invested with very short yellow hairlets ; fruit 

 straight, broad, flat, elongate-elliptical ; funicle thick, 

 from brown to almost black, half or rarely fully surround- 

 ing the seed. A. peiiniiiervis. 



Fruit narrow ... ... ... ... ... ... 924: 



924. Funicle almost doubly surrounding the seed. 



Finally arboreous, ever-flowering ; branchlets acutely angu- 

 lar ; phyllodia of rather thin texture, narrow- or linear - 

 lanceolar, gently curved, their secondary venules faint ; 

 racemes short, not rarely paniculated ; fruit elongate- 

 and broad -linear, almost straight, much compressed ; 

 funicle black -brownish. A. retinodes. 



Funicle short 925 



925. Phyllodia broad. 



Tall-shrubby or arboreous ; branchlets almost cylindrical ; 

 phyllodia firm, from elliptic- to lanceolar-falcate or 



