181 
Trilisia (Fig. 21-23). 
T. paniculata (Walt.) Cass. Style branches not clavate but 
cylindrical longer and more acute than in Mikania. Stigmatic 
papilla (fig. 23) about the same as in Mzkania, but occupy only 
one-third of the branch, and are in slightly narrower lines. Brush 
hairs (fig. 21, 22) cover the entire surface above the stigmatic 
lines. ; 
ASTEROIDE& (plate CXVIII, fig. 1-38). 
Gray* describes the style as follows: ‘“ Style branches of 
hermaphrodite flowers flattened, conspicuously margined by the 
_ stigmatic lines and extending into a hispid or papillose (some- 
times very short) appendage.” 
The following genera have been studied: Grindelia, Hetero- 
theca, Chrysopsis, Aplopappus, Bigelovia, Solidago, Brachycheta, 
Bellis, Townsendia, Sericocarpus, Aphanostephus, Boltonia, cdont 
LErigeron and Baccharis. 
In all these the style agrees with the description given by Dr. 
Gray for the tribe. There is a difference, however, in the ar- 
rangement of the stigmatic papilla and brush hairs that makes 
the following division of the tribe possible, so far as my studies 
have extended. 
DIVISION I, 
Style branches of the hermaphrodite flowers flattened, taper- 
ing from the base or just above the base to an acute or obtuse 
point. The stigmatic lines are distinct in two lines along the 
outer edges and tip. They occupy not more than one-half of 
the branch. The brush hairs covering the outer surface extend- 
ing down between the stigmatic lines or leaving an unoccupied 
space along the center. The inner face is:not covered with 
brush hairs except at the very tip and along the edges. This 
subdivision includes the genera: Solidago, Grindelia, Heterothe- 
ca, Chrysopsis, Aplopappus, Bigelovia, Brachycheta, Bellis, 
Townsendia and Sericocarpus. 
DIVISION II. 
Style branches flattened, linear from the base to the end of 
the stigmatic lines. Stigmatic papilla in two lines as in (I), but e 
41. ¢. p. §2, 
