Victorian Plants. 303 



Headlets of flowers rather large ... ... ... 1373 



1373. Fruits beset with silk-like vestiture. 



A desert- shrub, scarcely tall, always sticky ; leaves quite 

 small, mostly ovate-cuneate, indented ; headlets of flowers 

 terminating branchlets ; floral ray white. 



A. calcareus. 



Fruits glabrous. 



A desert-shrub, seldom tall, always sticky ; leaves small, 

 from elliptic- to linear-cuneate, flat, somewhat brittle, 

 often indented at the upper end ; headlets of flowers 

 terminating branchlets ; floral ray very conspicuous, 

 white ; fruits rather long. A, niagniflorus. 



1374. Floral ray bluish or purplish 1375 



Floral ray white ... ... 1378 



1375. Leaves as well as headlets of flowers relatively large. 



A desert-shrub, rather tall, rough from rigid jointed 

 hairlets ; leaves comparatively thin, from obovate- to 

 lanceolar-elliptical, denticulated, sessile or even clasping ; 

 headlets of flowers broad, conspicuously stalked, often 

 somewhat corymbously arranged ; involucral bracts in 

 two rows of almost equal length, acute ; expansions of 

 marginal flowers rather narrow ; fruits nearly glabrous. 

 (Erigeron rudis.) A. exul. 



Leaves as well as headlets of flowers relatively small 1376 



1376. Leaves appressed. 



Shrub, seldom tall, sticky, hardly spreading ; leaves minute, 

 crowded, linear-cylindrical, blunt ; headlets of flowers 

 quite small, terminating leafy branchlets ; involucre 

 remaining much contracted ; fruits glabrous, black ; 

 pappus short. A. teretifolius. 



Leaves spreading .- 1377 



1377. Quite shrubby. 



, Rather tall, much beset with simple glandule-bearing hair- 

 lets ; leaves rather long and flaccid, linear, acute, at the 

 margin revolute ; headlets of flowers solitary or two or 

 few near together, rather broad ; fruits beset with silk- 

 like vestiture. A. acleiiopliorus. 



