ASTER RUPICOLA 181 
type, or narrower.  Acumination abrupt, entire, narrow, propor- 
tionately long, as 17 inch in a leaf of size 2 x 1%. 
Teeth very sharp, close, outflung, large for the leaf; projection 
1$ inch or more, the back slightly curved, the front nearly straight 
or reentrant; producing a buzz-saw effect. Toward the apex the 
teeth become more forward-projecting, and such are all the teeth 
C 
Aster rupicola 
Fic. 28. 
upon the upper caulines. Toward the sinus or even into it they 
continue much further than is usual even among strongly-toothed 
varicatt. 
Hair not obvious, and very slightly developed, scanty under a 
lens on midrib and veins beneath, most developed on the inflores- 
cence-branches 
láflorescence small, convex-tufted, the small heads well- 
separated, their capillary pedicels often 24 in. long.  Bracteals 
inconspicuous, ovate or oval, to linear, % in. long, or less. Heads 
about 76 in. broad, 14 in. high. 
