57 
Solidago rugosa Miller, rough-leaved goldenrod, rough-stemmed 
goldenrod, p. 1495 
var. aspera (Aiton) Fern. 
var. celtidifolia (Small) Fern. 
var. rugo 
speciosa Nutt., prairie goldenrod, showy goldenrod, ia 1486 
var. rigitinecula Torrey & A. Gray [S: S. speciosa 
angustata Torrey & A. Gray; M: S. ca oe 
S: included var. rigidiuscula as a synonym of var. 
angustata, the latter is actually an extreme form of var. 
speciosa that does not occur in Missouri; the name 
angustata was misinterpreted by Friesner (1933) and 
orange (1950), who S: followed; see Cronquist (1980)) 
ya 
specio 
le almifolia Muhlenb. ex Willd., elm-leaved goldenrod, p. 1494 
var. palmeri 
var. ulmifolia 
DN 
SONCHUS, sow thistle 
¢Sonchus arvensis L., field sow thistle, perennial sow thistle, 
1635 
Ssp. arvensis 
ssp. uliginosus (M. Bieb.) Nyman [S, M: S. arvensis var. 
glabrescens Giinther, Grab. & Wimmer] (Boulos, 1973) 
4S. asper (L.) Hill, prickly sow thistle, spiny-leaved sow thistle, 
. 1636 
ssp. asper [S: incl. f. glandulosus G. Beck] (Boulos, 1973) 
¢S. oleraceus L., common sow thistle, p. 163 
SPILANTHES (see ACMELLA) 
TAGETES, marigold 
¢Tagetes erecta L., common marigold, African marigold, p. 1599 
*¢T. patula L., French marigold (Miihlenbach, 1979) 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
