41 
Erigeron philadelphicus L., Philadelphia fleabane, p. 1526 
var. philadelphicus 
E. pulchellus Michaux, robin’s plantain, p. 1526 
var. pulchellus 
E. strigosus Muhlenb. ex Willd., daisy fleabane, whitetop 
fleabane, p. 1528 
var. beyrichii (Fischer & C. Meyer) Torrey & A. Gray [M: E. 
strigosus] (Cronquist, 1947) 
var. discoideus Robb. ex A. Gray [S: E. strigosus f. discoideus 
(Robb. ex A. Gray) Fern.] (Cronquist, 1947) 
var. strigosus 
E. tenuis Torrey & A. Gray, p. 1528 
EUPATORIUM, thoroughwort 
Eupatorium altissimum L., tall thoroughwort, p. 1463 
+E. capillifolium (Lam.) Small, dog fennel, 
E. coelestinum L., mist-flower, blue boneset, wild ageratum, 
1467 
f. coelestinum 
E. fistulosum J. Barratt, ae weed, p. 1463 
E. hyssopifolium L., p. 1 
var. calcaratum Fern. 2 B. G. Schubert 
E. incarnatum Walter, p. 1467 
E. perfoliatum L., boneset, thoroughwort, p. 1464 
E. purpureum L., green-stemmed Joe-pye weed, p. 1463 
E. rugosum Houtt., white snakeroot, p. 1466 
var. rugosum [S: incl. var. rugosum f. villicaule Fern., var. 
tomentellum (Robinson) S. F. Blake] (Clewell and 
Wooton, 1971; Cronquist, 1980) (note that Clewell and 
Wooton (1971), who treated this species under the 
segregate genus Ageratina, also accepted var. 
angustatum (A. Gray) S. F. Blake, which they list as 
growing in Missouri, but this morph has not been 
accepted by subsequent authors) 
E. semiserratum DC. [S: E. cuneifolium Willd. var. semiserratum 
DC.) Fern. & Griscom] (Cronquist, 1980), p. 1463 
E. serotinum Michaux, late boneset, p. 1466 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
