188 CAMPANULALES 
7. Boebera. 1012. 
1. Boebera papposa (Vent.) Rydb. Fetid Marigold. 
Common all over the state. Brock; Franklin; Grand Rapids; Lin- 
coln; Minden; Nebraska City; Plainview; Red Cloud; Seotts Bluff 
County; Valentine; Wymore. 
8. Pectis. 1012. 
1. Pectis angustifolia Torr. 
In dry soil in the western part of the state. Deuel County; Ft. 
Niobrara. : 
Tribe 8. ANTHEMIDEAE. 
Rays usually present, white or pink; receptacle chaffy. 
Achenes flattened, heads small. 1. Achillea. 
Achenes terete, heads larpe 25 cm. or more broad. 2. Anthemis. 
Rays wanting or rudimentary, receptacle not chaffy. 
Heads corymbed, pappus a short crown. Tanacetum. 
Heads racemose, spicate or panicled, pappus none. 4. Artemisia. 
1. Achillea. 1013. 
1. Achitlea millifolium L. Yarrow, Milfoil. 
A common weed in the eastern part of the state. Fairbury; Hat 
Creek Basin; Lincoln; Nebraska City; Ponca; Red Cloud. 
2. Anthemis. 1014. 
4. Anthemis cotula L. Fetid camomile. 
Common in waste places in the eastern part of the state. Brown 
County; Lincoln; Nebraska City; St. Paul. 
4. Artemisia. 1017. 
Marginal flowers pistillate, central flowers perfect, mostly herbs. 
Central flowers sterile, not producing seeds, mostly with entire 
styles. 
Herbs, sometimes woody at the base, heads 2-4 mm. broad. 
Leaves pinnately dissected into narrow linear lobes. 
Heads 2 mm. broad, in a broad panicle. 1. A. caudata. 
Heads 4 mm. broad, in a narrow panicle. 2. A. canadensis. 
Leaves linear, mostly entire, sometimes 3-cleft or the lower 
more divided. 
Leaves glabrous. 3. A. dracunculoides. 
Leaves finely and densely pubescent. 4. A. glauca. 
Shrubs, heads small, numerous, about 1 mm. broad. 5. A. filifolia. 
Central flowers fertile, producing seeds, their styles 2-cleft. 
Receptacle with long woolly hairs. 
Plants 2-8 dm. high, leaf segments linear-filiform, less than 1 
mm. wide. 6. A. frigida. 
Plants 6-12 dm. high, leaf segments oblong or linear-oblong, 
over 1 mm. broad. 7. A. absinthium. 
Receptacle glabrous, or slightly pubescent. 
