182 
occupying more than one-half of the length of the branch. The 
brush hairs forming a triangular appendage at the end of the 
stigmatic lines and nearly equally covering both faces of the 
branch. The hairs on the outer face extend only a short dis- 
tance below the end of the stigmatic lines. This subdivision in- 
cludes the genera Aster, Aphanostephus, Erigeron and Boltonia. 
Baccharis has both staminate and pistillate flowers, and does not 
belong to either of the above. 
Solidago® (plate CXVIII, fig. 1-3). 
S. Canadensis, L. The general characters of the style have 
been given in the description of subdivison I. The stigmatic 
lines extend up a little less than one-half of the distance to the 
tip (fig. 1, 2). The brush hairs cover the entire outer surface, 
and the tip and edges of the inner face above the stigmatic lines 
(fig. 1, 2). Stigmatic papillze short, acute. Brush hairs long, 
cylindrical and obtuse. The shape and relative size of both pa- 
pill and hairs is shown in figure 3. 
Grindelia® (Fig. 4, 5). 
G. squarrosa (Pursh), Dunal. Style branches much like So/- 
dago, only longer and not as broad, gradually tapering to an obtuse 
point. Stigmatic lines occupy one-half of the length of the 
branch. Stigmatic papillz (fig. 5) more slender than in Solidago. 
Brush hairs (fig. 4) do not extend as far down the back as in So- 
lidago. 
Heterotheca® (Fig. 6, 7). 
A. subaxillaris (Lam.), Britt. Style branches enlarged at the 
base and tapering to a smaller point than in Solidago or Grinde- 
lia. Stigmatic lines occupy one-half of branch. Brush hairs do not 
occupy outer or inner face entirely, but leave a narrow zone along 
the center of both faces. Stigmatic papillae shorter and more 
obtuse than in So/dago (fig. 7). Brush hairs broader and short- 
er (fig. 6). 
Chrysopsis* (Fig. 8, 9). 
C. villosa (Pursh), Nutt. Style branches almost identical with 
73 Hildebrand, |. c., p. 22. Miiller, 1. c., p. 320. 
a Gray, 1}. ..:ps 64; 
26 Gray, |. c., p. 53. 
“41. G., p. 53. 
