410 INDEX-KEy 
35. A. macrophyllus : lr. lvs. oblong-ov., acute, harsh ; si. large. 
298 
336. A. m. apricensis: branched ; lvs. oval-acute, strap-winged. 
31 
55c. A. m. sejunctus: lr. lvs. cordate-ov., soft-hairy, bristly dry. 
5d. A.m. velutinus: \vs. smaller, subtriang.; close short hair ben. 
322 
55e. A. m. pinguifolius: whitish ; broad-cordate, greasy, glabrate. 
323 
** Plants taller, glabrous; bracts lingual, acutish ; inflor- 
escence convex or diffuse ; sinus broa 
56. A. excelsior: lr. lvs. cordate-oblong, large ; stem purple-red. 
32 
*** Plants smaller ; bracts lingual, obtusish ; inflorescence 
bunchy, compact ; sinus narrow 
57. A. orbicularis : hairy ; lr. lvs. cordate-suborbic.; sinus narrow. 
339 
58. A. formis: lr. lvs. few, cordate-oval, acute, crenulate, 
glabrate. 
Subdiv. B. Lvs. firmer, less polymorphous; strong-stem ; 
serrate ; very glandular. 
* Not tall; lavender rays; chf. br. acutish ; inflor. convex. 
59. A. uniformis: lvs. broad-deltiform, abruptly acum.; downy. 
333 
60. A. Alleghanieusis : lvs. ovate, thicker; few cordated ; strict. 
336 
61. A. sabulosus: lvs. still thicker, rougher, ov.-acum., suberect. 
337 
62. P quadratus: lr. lvs. subquadrate, si. shallow; radical si. 
eep. 
** Tall; lilacine rays; chf. bracts lingual, rounded at apex. 
63. A. densatus : lvs. thin, suborbic., quite uniform, rough-hairy. 
341 
64. A. roscidus : lvs. thick, subquadrate or rounded, apiculate. 
Subdiv. C. Lvs. thinner, savagely double-serrate ; plant low, 
strigose ; radicals large, asymmetrical. 
= FSi — Seer) = 
