Contposite—A mmobium. 259 
account of the central achenes being abortive and the outer 
fertile ones being broad and flat with a pappus of barbellate 
bristles. It is the only species, an annual from 1 to 2 feet 
high with a rough or woolly 
pubescence and corymbose 
flower-heads. Outer invo- 
lucral bracts brown, inner 
clawed, with a spreading 
white or pink limb. ; 
We might extend this 
enumeration, but as:they are 
chiefly delicate annuals we 
believe we have given an 
ample selection. y 
33. AMMOBIUM. 
This genus also belongs 
to the Everlasting group, 
but it differs from all the 
preceding genera in having 
scales or bracteoles on the 
receptacle between the 
florets, and quadrangular 
achenes crowned with a 
membranous cup-like pap- 
pus. There are only two 
species, both Australian. 
The name is from dupos, 
sandy sea-shore, and (ios, 
life, in allusion to the habi- 
tat of the following species. 
1. A. alatum (fig. 145). 
—Annual or perennial, 
about 18 inches high. Stems 
winged ; leaves sparse. ° In- 
volucral bracts white; florets 
all tubular, yellow, exceed- 
ing the involucre. Fig. 145. Ammobium alatum. (4 nat. size.) 
ie 
