92 SYSTEMATIC DESCRIPTION OF ASTERS 
20t. Angulate form: leaves irregularly abruptly angulate 
20°. Pluridentate form: subcircular part of the /eaves increased ; buzz-saw teeth ; larger 
heads. 
20°. Rock-dwarf form: leaves more ovate, thickened, serrate. 
21. A. CIRCULARIS : Žaves smaller, firm, and with a broad sinus, but more circular- 
— in close-teeth curve-backed ; veins obscure, more outcurved. 
visioN C. BRACTS uci rounded at tip, nearly all alike in 
shape, isch ise gree 
22. A. ARGILLARIUS : leaves very small, ovate-acute, with but little sinus, and with two 
ore short teeth, a petioled, firm, rough when dry; plants almost dwarf; 
naan obconical. 
221. Pale-disk form: leaves more cordated, more acuminate; teeth often obsolescent. 
225. Linnaea-leaved form : leaves very small, thickish, roundish, crenate. 
22°. Pinnated form: leafy pinnately-corymbose inflorescence 
227. Rock-seam form: leaves darker, thinner, larger. 
23. A. AUCUPARIUS: leaves oval-acuminate, with rounded or subtapering dase, all 
petioled or upper with cuneate sessile base; a few lower leaves with a slight 
sharp sinus; inflorescence convex,  Virgate. ; 
23?. Truncate-base form : leaves shuttle-shaped. 
24. A. LISTRIFORMIS : Zeaves oval-obtuse, bus trt spade-li&e, cuneate-winged; axiles 
larger, prolonged, ovate-triangular, acuminate ; branches long or whiplike, lax 
d foliose. 
24?. Helioscopian form : bracteals suborbicular, in threes. 
243, Refracted form: bracteals chiefly ovate-triangular. 
24*. Virescent form: bracteals limp, oval, enlarged. 
245. Trowel-leaf form : — chiefly ova iis triangular 
249. Round-leaf form: many Sin leaves roundish, valued. 
"^ Little-spade form: many small subentire listriform leaves. 
. Shuttle form: most leaves EA obtuse. 
25. A. CARMESINUS : /eaves oval-acute, crenate-serrate, crisp, all with short slender 
petioles ; sinus deep, narrow ; inflorescence shallow, widely divergent, segregated. 
25°. Parchment-leaf form: leaves firmer, granular-roughened. 
257. Syncopated form: heads subsessile, in leafy-subtended clusters. 
258. Green-aw/ form: rays crowded, open-filiform, erect, virescent. 
Division C. TENEBROSIAN ASTERS. Thinnest smoothest leaves. Disks 
with less red or none. 
SUBDIVISION A. BRACTS obtuse, very n 
26. A. CASTANEUS: eaves ovate-lanceolate, serie, seri. dull, roughish when 
dry, without sinus, a few smaller lower leaves ovate-acute with small sinus; 
dis& soon dull yellowish-brown then sienna or chesteut-colored ; ; inflorescence of 
— separated loose convex cymules; bracts linear, truncate-obtuse; rays 
li o 
27. A. OLIVACEUS: Žaves ovate-acuminate, coarse-serrate, with strong broad PES 
-green ; disks greenish, then brown; cymul 
separated, pehee inner bracts many, scarious and very taper: rays ia 
linear, about 7-9. 
Suspivision B. BRACTS acute, very broad-triangular; the inner oblong, 
obtusish. 
28. A. TENEBROSUS : leaves oblong-ovate, incurved-acuminate, large, coarsely acumi- 
