COLOMBIAN FATPATORIUMS. 267 



arborescent species, of which th(> typical form is confined to the Lesser 

 Antilles, while a i)crccj)til)!y dilfcrciit puhcsccnco-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. articulatwn extending from Colombia both into Venezuela 

 and southward into Peru; E. scahrum, a species often erroneously 

 interpreted in the past, said by Baker to reach Guiana and Peru; 

 E. inulaefolium; E. pundulatum, a species first collected presumably 

 in eastern Brazil but said by Baker to occur also in Colombia ; finally 

 two species of WTedlike character and belonging to the little Sect. 

 Pra.vdis, namely E. pauciflonun , which ranges from Colombia to 

 Brazil, and E. kleinioides, which extends from Colombia to Brazil 

 and also in somew^hat varying form to Peru. 



When the Colombian Eupatoriums are thus analyzed, the following 

 generalizations become possible. 



a). The 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 

 no 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 w'hich are abundant and widely distributed. All of 

 them but one are identical with those common to Colombia and the 

 Mexicano-Central-American region. 



c). 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. corymhoswn) has been stated by 

 Aublet to occur in French Guiana. 



d). The element common to Venezuela (21 species when all are 



