EUPATORIACEZ. 13 
original one, to take names as follows: all having been named 
under Æupatorium by the authors indicated: T. COMPOSITI- 
FOLIA (Walt. Carol. 199), PINNATIFIDA (Ell. Sk. ii. 295), LEP- 
TOPHYLLA (DC. Prodr. v. 176), EUGENEI and PECTINATA (Small. 
Fl. 1165). 
By far the greater proportion of the United States Eupatoria 
belong to a group of herbaceous perennials with opposite leaves, 
and white flowers in sessile terminal compound corymbs; the 
involucral bracts quite as few as in Ayrstenia, even fewer, but 
in two or more very unequal series, the individual bracts of firm 
texture, not ribbed or obviously nerved, obtuse or acute, often 
white-maryined or even scarious-tipped. The corollas are 
small, consisting of a short tube and equally short, narrow fun- 
nelform throat or limb, the color always white; style-branches 
not short, notably clavellate. Both involucres and achenes apt 
to be strongly gland-dotted; the fine white pappus-bristles 
from scabrous to barbellulate. 
Of this assemblage I take Æ. perfoliatum, Linn., to be about 
the oldest type, and name the genus UNCASIA, transferring to 
it by name the following: U. PERFOLIATA (Linn. Sp. 838), 
TRUNCATA (Muhl. in Willd., Sp. iii, 1751), CUNEATA (Engelm. 
in Torr. & Gray, ii, 88), SESSILIFOLIA (Linn. Sp. 837), ALTISSI- 
va (Linn. Sp. 837), ROTUNDIFOLIA (Linn. Sp. 837), scABRIDA 
Ell, Sk. ii, 298), pUBEscENS (Muhl. in Willd. Sp. iii, 1755), 
SEMISERRATA (DC. Prodr. v. 177), cUNEIFOLIA Willd. Le 
1753), HYSSOPIFOLIA (Linn. Sp. 836), ToRTIFOLIA (Chapm. 
Bot. Gaz. iii, 5), LINEARIFOLIA (Walt. Carol. 199), LECHEÆ- 
FOLIA (Greene, Pitt. iii, 177), ToRREYANA (Short, Supplem. 5), 
LEUCOLEPIS (Torr. & Gray, FI. ii, 84), ALBA (Linn. Mant. 111), 
PETALOIDEA (Britt. Bull. Torr. Club, xxiv, 492), VERBEN FOLIA 
(Michx. F1. ii, 98), ANOMALA (Nash, Bull. Torr. Club, xxiii, 106), 
Mopp (Greene, contr. U. S. Herb. vi, 762), RESINosA (Torr., 
DC. Prodr. v. 176), MIKANIOIDES (Chapm. FI. 195), 
With the exception of U. serotina, which ranges southward 
into Mexico, I have not seen any Mexican Eupatoria that are of 
this genus; but in South America there seem to be a number 
of species; U. GLOMERATA and PALLESCENS (DC. Prodr. v. 
154) for mere examples, and, for one that in aspect recalls 
U. perfoliata, U. ALVIA (Colla). 
