160 Key to the System of 



769. Leaves abbreviated, linear, revolute at the margin. 



Rather dwarf ; leaves crowded, rigid ; racemes capitular, 

 forming a compact corymb. P. ericoides. 



Leaves elongated, from broad-linear to narrow-lanceo- 

 lar, flat or somewhat recurved at the margin. 



Rather tall ; leaves firm ; racemes capitular, forming an 

 ample corymb. P. corymbosa. 



A3KPEREA. 



770. Stems and branches prominently triangular or biangular. 



Perennial, slender herb ; leaves small, distant, occasionally 

 almost absent, mostly lanceolar- or rhomboid-cuneate and 

 somewhat indented ; flowers in small lateral or axillary 

 clusters. A. spartioides. 



CLAOXYLON. 



771. Leaves conspicuously stalked. 



Finally a good -sized tree ; leaves almost membranous, from 

 ovate- to elliptic-lanceolar, denticulated; flowers very 

 small, in racemes, the staminate and the pistillate flowers 

 mostly on distinct plants. C. Australe. 



ADRXANA. 



772. Leaves scattered, conspicuously stalked. 



Mainly a desert-shrub, scantily or extensively beset with 

 starry hairlets ; leaves often from ovate-lanceolar to 

 cordate in outline and three-lobed, with two stipitate 

 glandules at the base ; flowers rather large, in spikes, the 

 staminate and the pistillate flowers on distinct plants ; 

 fruit rather large. A. tomentosa. 



Leaves opposite, hardly stalked. 



Exclusively a coast-shrub, scantily or extensively beset 

 with starry hairlets ; leaves ovate-lanceolar or somewhat 

 rhombeous, lobeless, with two stipitate glandules at the 

 base ; flowers rather large, in spikes, the staminate and 

 pistillate flowers on distinct plants ; fruit rather large. 



A. quadripartita. 



IKXCRANTHEUM. 



773. Stamens six to nine. 



A shrub, often tall, almost or quite glabrous ; leaves rather 

 rigid, from linear- to cuneate- elliptical ; flowers small, 

 solitary or few together. M. hexandrum. 



