INDEX-KEY 407 
23. A. aucuparius: chf. lvs. oval-acum. with rounded base, pet. 
narrow. 190 
24. A. “striformis: chf. lvs. obtuse, crenate, spade-like ; wings. 
193 
25. 4. carmesinus : lvs. oval-acute, crenate-serrate, pet. nar. 197 
Div. C. TENEBROSIAN ASTERS. Thinnest, smoothest 
leaves. Disks hardly red. 
Subdiv. A. Bractsobtuse, very narrow. Cymules remote, 
26. A. castaneus: chf. lvs. ovate-lanceo., slit-ser., taper-based. 
20I 
27. A. olivaceus: lvs. ovate-acum., coarse-ser.; si. strong. 204 
Subdiv. B. Bracts acute, very broad-triang.; exc. inner. 
28. A. tenebrosus: lvs. obl.-ov., large, coarse-ser., axiles long. 
207 
Subdiv. C. Bracts rounded, short and broad, scale-like. 
29. A. chlorolepis: lvs. like last, but si. sharp ; disk more red. 211 
Div. D. CLAYTONIAN ASTERS. Thickened firmer lvs., 
roughish when dry, not large. Disks high, soon 
brown. Lvs. chiefly ovate-acuminate. 
Subdiv. A. Bracts narrow, oblong; lvs. smooth, fresh ; 
veins cord-like beneath. 
30. A. Claytoni: lvs. short-acum.; t. strong; axis percurrent. 212 
306. A. CL crispicans: lvs. caudate ; teeth close, nar., crispicant. 
225 
Subdiv. B. Bracts ism (exc. 34); lvs. thicker ; veins 
cordlike ; hds. narro 
31. A. ebeneus : lvs. oblg., ee dark, crenate-ser.; stem dark. 
32. A. mollescens : lvs. ov., alm. fleshy, little ser.; disk, lvs. and 
tem pale. 
33. A. ardens : lvs. triang.-ov.; t. sharp; disk and stem bright 
red. | 232 
34. A. scutiformis: lr. lvs. scutiform, ser.; disk and stem dull. 
237 
Subdiv. C. Bracts broad. Texture dense, firm. Plants 
in stools. 
zi. A. arcuatus : low-ser.; lvs. & si. broad, subtruncate ; stem de- 
curved. 240 
