178 
F. Hildebrand”, who has given a thorough description, with 
plates, of the genera studied by him, notices the brush hairs and 
stigmatic papilla closely, the purpose of his paper being to 
point out the mechanism for pollination. 
Bentham and Hooker in ‘‘ Genera Plantarum ” divide the order 
Composite into thirteen tribes, of which ten are included in the 
revised edition of Gray’s New Manual, as follows: 1. Vernontacee, 
2 Eupatoriacee, 3 Asteroidee, 4 Inuloidee, 5 Helianthoidee, 6 
Helenioidee, 7 Anthemidee, 8 Senecionidee, 9 Cynaroidee, 10 
Cichoriacee. In Gray’s ‘* Synoptical Flora of North America” 
one other tribe is given, viz: Jutistacee. In the arrangement 
of tribes I have followed Gray. In most cases the genera in each 
tribe are taken up as they appear in the Manual. 
VERNONIACE (plate CXVII fig 1-6). 
Of the Vernoniceze Gray says: ‘“ Style branches slender, fili- 
form or attenuate subulate, acute, hispidulous or hispid; stigmat- 
ic lines only near the base.” 
Bentham says: “Stigmatic lines near the base on the inner 
surface not very conspicuous.” 
I do not, however, find the arrangement of the stigmatic 
papillze as they are described by these authors. 
In Vernonta and Elephantopus, the stigmatic papillze are ar- 
ranged in one line, occupying about one-third of the inner face of 
the branches and extending up the center of this face from the 
base to within a very short distance of the tip. 
This is nearly as Hildebrand” has described it except that a 
single stigmatic line occupies the whole inner face. The stig- 
matic lines are very distinct and are essentially the same in 
Vernonia and Elephantopus. The papille in both genera are 
short, broad. at the base and taper to an acute point. The 
brush hairs cover the entire surface not covered by papille 
and extend for some distance below the forks. 
Vernonia® (Fig. 1-5). 
V. Arkansana, DC. The branches of the style are 
terete, long, (about one-fourth the length of the style) 
16 Ueber die Geschlechtsverhiltnisse bei den Compositen. 
1s. C., pi Td: 
%8 Hildebrand |. c., p. 14. Cassini l. c., p. 22, 
