172 AMERICAN MIDLAND NATURALIST 
d. Folia series superioris in petiolos 
angustata. 
e. Inflorescentia racemus longus, spicae 
SUMMIT Ta Mees ATR eee ae ern 16. var. petiolata. 
e. Inflorescentia brevis, subcorym- 
bases ities bet ee eee oe ee 17. var. subcymosa. 
d. Folia series superioris in petiolos non 
angustata. 
e. Inflorescentia racemus longus, spicae 
similior, capitulis in parte quadam 
rachidis subcorymbosis. 22... ase - 
18. var. corymbulosa Sheldon. 
e. Inflorescentia racemus longus, spicae 
similior, capitulis subcorymbosis 
non interruptus. 
Series ambo foliis brevibus, ob- 
longozlanceolatis..20-.. 6. seen 19. var. virginiana 
Folia series inferioris elongata, 
lanceolata, racemi longissimi, non 
interrupti, capitulis aequaliter re- 
motis, brevipedicellatis.......20. var. strictissuma 
f. Folia series inferioris valde elon- 
gata, lanceolata, valde dispersa, 
capitula sessilia, in spica angusta, 
interrupta, inaequaliter disposita. . 
21. var. virgata 
b. Caulis ramosus, capitulis ramorum ses- 
Silibus. vel, brevipedicellatis.. -2 s.. 32. =: 4. var. ramea 
a. Folia series inferioris amplitudinem modicam 
neque petioos tam longos praebentia, magis 
minusve relmota. 
b. Inflorescentia racemus multicapitatus, 
elongatus, capitula bracteis late spatu- 
latis-vel: oblongis)-subsessilia -.~ 2.22 45-2 5 var. porrecta 
b. Inflorescentia racemus brevis, paucicapi- 
tatus, capitula bracteis anguste spatulatis 
VelulimeanDUSsc mated seers ert 22. var. Novae-Angliae. 
a. Folia series inferioris amplitudinem modicam 
neque petiolos tam longos praebentia, lan- 
ceolata vel auguste lanceolata, nec non 
