8 LEAFLETS. 
Meanwhile Mr. Small, in his Flora of the Southeastern States, 
has seconded my restoration of Conoclinium and also admitted 
Osmia. It is therefore opportune to present suggestions of the 
excellent titles to generic rank held by other assemblages of 
species of so-called Hupatorium. 
KYRSTENIA (Neck. Elem. i. 81) has for its most historic and 
representative species two herbaceous plants known well in 
pre-Linnean days, one of which Linneus called Eupatorium 
aromaticum and the other Ageratum altissimum better known to 
us as Eupatorium ageratoides, a name assigned it by the younger 
Linnæus. 
These two plants, and with them a host of their congeners, 
are so unlike true Eupatorium and at the same time so like 
Ageratum in foliage, inflorescence, uniserial involucre, and even 
as to flowers and fruits, that nothing but the fine-bristly rather 
than paleaceous pappus could have kept them apart from the 
genus last named, where, as already noted, Linnzus did actually 
place the first species. They differ from Eupatorium by a set of ` 
characters exactly corresponding to those by which Z7igeron is 
held separate from Aster. 
One must needs assume the Atlantic North American species 
just mentioned to be the proper type of KYRSTENIA. They are 
herbaceous perennials with opposite leaves and a corymbose 
inflorescence; their thin almost uniserial involucral bracts 
notably pointed. 
I subjoin a list of representative species, all belonging to the 
flora of the United States, using the specific names at present in 
vogue for each under Eupatorium, saye only in the case of Æ. 
ageratoides which alone has a specific name older than that in 
common use; and I give in parenthesis the place of publication 
of each as an Eupatorium. 
KYRSTENIA AROMATICA (unn Sp. 839),VIBURNIFOLIA (Greene, 
Pitt. iv. 276), ANGUSTATA (Greene, l. c. 277), NEMORALIS 
(Greene, 1. c. 278), Tracy (Greene, 1. c.), ABORIGINUM (Greene, 
l. c. 277), BOREALIS (Greene, Rhodora, iii. 83), CEANOTHIFOLIA 
(Muhl, in Willd, Sp. iii. 1755), ALTISSIMA (Linn. Sp. 839 under 
Ageratum; Eup. ageratoides, Linn. f. Suppl. 355), INCARNATA 
(Walt. Carol. 200), sucuNDA (Greene, Pitt. iii. 180), MELIS- 
