PRESENT LIMITS 53 
not including Sericocarpus ; in which again their judgment has 
been uniformly approved since. 
If we ignore the whimsical and universally rejected mésalliance 
of Aster with Solidago and other genera by Kuntze in 1891, little 
alteration in the bounds of the consolidated genus Aster remains 
to mention, until the work begun in 1896 by E. L. Greene in his 
Pittonia, resulting in his separating or recognizing Doellingeria, 
Eucephalus, Machaeranthera, Tripolium, Heleastrum, Oreastrum, 
Leucosyris, Leucelene and Ionactis. 
The limits for the genus Aster which my own judgment ap- 
proves are those adopted in Britton and Brown's Illustrated Flora, 
in 1898, retaining two of Greene's new genera, Leucelene and 
Ionactis, and recognizing Machaeranthera and Doellingeria as well 
as Sericocarpus and Brachyactis. My contribution of Aster-species 
to Small's Southeastern Flora, 1903, also follows these limits. 
With the exception of the segregate genera named in this para- 
graph, Asżer now includes in America nearly all the species which 
have ever been accredited to it; disregarding a few species which 
stood so near the debatable lines between Solidago, Aster and 
Erigeron, that they had occasionally crossed over the lines in 
earlier times. 
