SUNFLOWER FAMILY 387 
Tribe 4. ANTHEMIDEAE 
All flowers of the heads with corailas, * ee or = os ones ecco 
eceptacle chaffy at least 
Rays in cultivated variety of Antheonis | ble: annual or perennial herbs. 
95. . 
present (abs 
ds solitary at the tips of the branches; rays elon rae 
Heads closely corymbiform; rays short and broad. 96. Achill 
Rays absent; subshrubs. Rad Sontotina 
sii siadoté naked eet soa baits in Tanacetum potentillioides; scaly in Art i 
Pappus (in ours) p 
Flowering heads yellow; pappus- pulese not awn-tipped. 98. Hymenopappus. 
sh; tipped. 99. Hymenothrix. 
Flowering heads white or nen rpli papf 
Pappus absent or a short crow 
ceptacle flat or pe lesz convex. 
Rays ¢ cenepicnen, white or yellow (pistillate flowers lacking and thus rayless in sta 
ithemum balsamita). 100. ps santhem 
ai Saeed or Load small in proportion to the head. 101. nacetum, 
102. aisivindeia 
mispheric or conical. 
sin spiciform, racemose, or  sresgopiptee inflorescences. 
105. Artemisia. 
Hea 
Marginal flowers only of the head 
Heads peduncled; marginal ‘tae ers scdueatie on the receptacle; style deciduous, only the inconspicuous base 
remaining. 104, Cotula, 
Heads sessile; marginal flowers sessile; style persisting as a conspicuous stout spine. 
103. Soltva. 
5663. Baccharis pilularis . Baccharis glutinosa 
5664. Baccharis douglasii ome Baccharis viminea 
