COLOMBIAN EUPATORIUMS. * 267 
arborescent species, of which the typical form is confined to the Lesser 
Antilles, while a perceptibly different pubescence-variety is found in 
Colombia. : 
6). Finally a few species, reaching their northwestern limit in 
Colombia, are somewhat widely distributed in tropical South America 
without passing north of the Isthmus of Panama or occurring (with 
the exception of E. inulaefolium) on any of the West Indian Islands. 
These are E. articulatum extending from Colombia both into Venezuela 
and southward into Peru; E. scabrum, a species often erroneously 
interpreted in the past, said by Baker to reach Guiana and Peru; 
E. inulaefolium; E. punctulatum, a species first collected presumably 
in eastern Brazil but said by Baker to occur also in Colombia; finally 
two species of weedlike character and belonging to the little Sect. 
Praxelis, namely E. pauciflorum, which ranges from Colombia to 
Brazil, and E. kleinioides, which extends from Colombia to Brazil 
and also in somewhat varying form to Peru 
When the Colombian Eupatoriums are thus analyzed, the following 
generalizations become possible. 
e€ common element between the species of Colombia (93 in 
number) and those of the Mexicano-Central-American region (esti- 
mated at about 250) is surprisingly slight, amounting to only 12 spe- 
cies, that is to say about 13 per cent of the Colombian and only 4.8 
per cent of the Mexicano-Central-American representation of the 
genus. Furthermore, these 12 species are all common and abundant 
plants also in other regions. All of them have been known for some 
decades and most of them from the earliest period in the botanical 
exploration of tropical America. It is also worthy of mention that 
70 one of these species which extend into Colombia from north of the 
Isthmus finds its limit in Colombia. All pass entirely through the 
Country and are found at least in Venezuela or Ecuador, and most of 
them in’ Brazil, Peru, and Bolivia as well. 
b). The common element between Colombia and the Greater 
Antilles is considerably less, amounting only to 5 species. These 
also are plants which are abundant and widely distributed. All of 
- them but one are identical with those common to Colombia and the 
Mexicano-Central-American region. 
,): The common element between Colombia and the Lesser An- 
tilles amounts to only 5 species. Of these, four are more or less 
abundant in coastal South America from the Isthmus to the mouth 
of the Orinoco, and the fifth (E. corymbosum) has been stated by 
Aublet to occur in French Guiana. 
The element common to Venezuela (21 species when all are 
