we —— 
SINGLE-LINE INDEX-KEY TO THE BIOTIAN 
ASTERS. 
For fuller Conspectus or Analytic Key see pp. 89—roo. 
Abbreviations occurring below include : acum. acuminate, “et cg cte br. 
bracts, cZar. characteristic, «i chief, Ads. heads, /azceo. lanceolate, /vs. lea 
lower, zar. narrow, o ig. oblong, ped. pedicels, ov. ovate, pet. pet iun 2o radical 
leaves, ser. serrate, sz. sinus, Z. teeth of the leaf-margins, /r/azg. triangul 
White rays; no glands; rays usually under 12. Sp. 1-54. 
Subsections 1 and 2, DIVARICATI and CURVESCENTES. 
Subsection 1. DIVARICATI. Radicals few, small, seldom 
seen; exc. I¢ and 2 
Div. A. DIVARICATE ASTERS proper. Thin lon 
smoothish polymorphous leaves ; reddish-brown disks. 
Broad-tip bracts. Salient teeth. 
Subdiv. A. Stem assurgent, repeatedly flexuous, brittle. 
a. Chief leaves prolonged ovate-lanceo., incurved-acum. 
I. A. divaricatus: coarse t.; br. ciliate, and truncate, chanfer, or 
rounded. 
b. Chief leaves diverse, much shorter. 
Ia. A. d. alatus: large lvs. & t.; wings ; br. less obtuse. 127 
1%. A. d. cymulosus : lvs., t. & rays reduced ; heads crowded. 130 
Ic. A. d. curtifolius : small rounded lvs.; close sharp t. 132 
id. A. d. deltoideus : small deltoid-acute lvs.; remotish t. 133 
Ie. A. d. fontinalis : tufts of large thin radicals, oval-acute, etc. 
134 
2. A. viridis: tufts of large thick radicals, cordate-oblong, etc. 
I 
3. A. arenicola : lvs., t. & sinus small; br. nar.-oblong. 138 
c. Chief leaves long-attenuate, but unlike A. divaricatus. 
* Bracts obtuse or chanfer, linear; sharp out-flung 
teeth ; sinus broad. Virgate 
4. A. persaltens : lance-lvs., taper-based ; remote couchant t. 140 
5. A. atrovirens: chf.lvs. triangular-acum.; close slender t. 145 
6. A. erectus: lance-acum. lvs.; couchant t.; suberect rays. 147 
