408 INDEX-KEY 
36. A. sociabilis: lvs. ov.-acum.; t. close, salient; si. strong. 242 
37. A. ulmarius : lvs. oblong-ov., crenate-ser.; si. nar. 244 
Div. E. FURCATE ASTERS. Bracts acutish, large, 
flattish. Plants small, scattered. 
38. A. furcatus: lvs. ov.-triang., hispidulous both sides; hds. 
remote. 246 
39. A. leptocaulis: lvs. oblong-acute, little rough, dense hair ben. 
248 
Subsection 2. CURVESCENTES. Radicals usual, in con 
spicuous colonies ; white rays, at times pink but not 
violet ; disk sienna, not red ; pedicels with lines of hair, 
not all-over tomentulose ; no glands. 
Div. A. CURVESCENT ASTERS proper. Rays narrow. 
Chf. bracts thin, pale, attenuate, taper-obtuse. 
Subdiv. A. Inner bracts all-scarious, without obvious 
midrib or hair. 
40. A. curvescens : lvs. orbicular-cordate ; curvescent ; rays 8. 
2 
Subdiv. B. Inner bracts with obvious midrib. 
41. 4. oviformis : lvs. oval-acute, close-crenate, thin ; si. sharp. 
253 
42. A. vittatus: lvs. ov.-acum., sharp-ser. firm, br. striped; 
si. shallow. 256 
43. A. umbelliformis : ivs. orbic.-ovate, subcrenate, large ; si. deep. 
2 
Div. B. Bracts highly coriaceous, pale, obtuse, with green 
tip and midrib. 
Subdiv. A. GLOMERATE ASTERS. Hds. close, radi- 
* Bracts glabrate, little ciliate. acutish or taper- 
obtuse ; teeth close, sharp, firm. 
44. A. exacutus: fastigiate; lr. lvs. larger, few; many elliptic, 
entire. 260 
45. A. Eriensis: low-convex; lvs. oval-acute, glabrate, small. 
261 
* * Bracts ciliate; teeth subcrenate; texture coarse 
and i 
leavy ; sinus large 
46. A. glomeratus: domed ; lvs. orbic.-acute, small, pilose ben. 
: 263 
