xii | CONTENTS 
HISTORY OF THE BIOTIAN SECTION OF ASTER 59 
Rank of the Biotian section 60 
Comparative History of Biotian Species 62 
First known collectors of Biotian Asters 69 
First cultivation of Biotian Asters z2 
European work upon Biotian Asters ; Nees 73 
American work upon Biotian Asters 76 
SYSTEMATIC DESCRIPTION OF ASTERS. 
Introductory Explanations 83 
Conspectus of Biotian Descent 88 
ANALYTIC KEY TO BIOTIAN ASTERS 89 
DESCRIPTION OF SPECIES AND VARIATIONS OF ASTERS 100 
Generic Character 100 
Section Character IOI 
Subsection DIVARICATI »- IOI 
Description of 4. divaricatus 102 
History of A. divaricatus 107 
Variants of A. divaricatus III 
Subspecies of A. divaricatus y 
Other Divaricati ......... 135 
Carmesine Asters . 173 
Tenebrosian Asters ai M 
Claytonian Asters 212 
Furcate Asters i 246 
Subsection CURVESCENTES 249 
Curvescent Asters 249 
Glomerate Asters 260 
Schreberan Asters .... ......... 273 
Subsection MACROPHYLLI 297 
Lavender Macrophylli 297 
Description of A. irepl CS TO 298 
History of A4. macrophylli ; 306 
Variants of A. hiria 314 
Its subspecies -319 
Allied specie 27 
Ianthine Macrophylli 350 
SINGLE-LINE INDEX-KEY.............. os.) 405 
GENERAL INDEX. 413 i 
