194 Key to the System of 



929. Longitudinal venules of the phyllodia immersed. 



Shrub, from low to rather tall ; branchlets often beset with 

 a subtle almost mealy vestiture ; phyllodia rigid, broad- 

 linear, upwards still broader, minutely pointed, seldom 

 much elongated ; flower-headlets small, sometimes in a 

 corymb ; their stalks almost white-powdery invested 

 with minute interwoven hairlets ; fruit linear- cylindrical, 

 generally arched-curved, somewhat contracted between 

 the seeds ; arillar appendage rather pale, short, but 

 enlarged by the folded and twisted funicle, 



A, fariuosa. 



Longitudinal venules of the phyllodia much emersed 930 



930. Longitudinal venules of the phyllodia thin and numerous. 



Tall shrub ; phyllodia rigid, from broad linear to iiarrow- 

 lanceolar, usually somewhat curved, short-pointed ; flower- 

 headlets small, nearly sessile; fruit rather broad, glabrous, 

 much curved or even spirally twisted ; its valves hard ; 

 seeds shining ; funicle short ; arillar appendage orange- 

 colored, unilaterally extending to about half the length 

 of the seed. A. Osswaldi. 



Venules of the phyllodia rather strong and few ... 931 



931. Venules of the phyllodia scarcely anastomosing. 



Shrub, rather low ; phyllodia rigid, often rather short, from 

 elliptic- to broad -linear, occasionally somewhat cuneate, 

 minutely pointed ; flower-headlets small, on short stalks ; 

 petals disconnected ; fruit linear-cylindrical ; its valves 

 somewhat streaked outside ; seeds shining ; arillar ap- 

 pendage pale-brownish, extending only around the base 

 of the seed. A. sclerophylla. 



Venules of the phyllodia somewhat anastomosing ... 932 



932. Phyllodia quite blunt. 



Shrub, rather dwarf ; branchlets angular, beset with minute 

 hairlets ; phyllodia rigid, almost elliptic-linear, but nar- 

 rowed downward, somewhat curved ; flower-headlets 

 small, on short stalks ; petals connected to about thp 

 middle ; fruit unknown. A. Wlianii. 



Phyllodia sharp-pointed. 



Shrub, rather tall ; branchlets angular, densely beset with 

 short hairlets ; phyllodia rather rigid, mostly narrow- 

 lanceolar ; headlets of flowers on very short stalks ; 



