16 DIPLOPAPPUS LINARIIFOLIUS. —SANDPAPER STAR-WORT, 
leave us, the seeds being scarcely mature in Pennsylvania by the 
time the severe frosts come. The height of its season in that 
' State is October, though it commences to flower in September. 
Prof. Wood places it a month earlier than this. It is generally 
found in dry, hilly, rather open woods, from Canada to Florida, 
along the Atlantic coast; but it lessens its northern range as it 
proceeds west, and is not found on the other side of the Missouri 
or Mississippi. 
It is more favored than many of its allies in being of some use 
to man in other ways beside its beauty, for in South Carolina, 
where it is rather abundant, the leaves are used as a substitute 
for sandpaper in polishing horn. 
EXPLANATIONS OF THE PLATE.—I. Branch from several that formea a tow cushy p.ant. 
2. Magnified disk floret. 
