42 ROBINSON. 



II. A RECENSION OF THE EITATORIUMS OF PERU. 



The literature of the Peruvian Eupatoriums is not extensive, the 

 more important records on the subject being as follows: In 1786, 

 Lamarck (Encycl. ii.) described as from Peru four species of Eupa- 

 torium, but of these one has since proved a Stevia and the others, collected 

 by Joseph de Jussieu, came presumably from what is now Ecuador. 

 Kunth in 1820, ha\ing worked over the collection of Humboldt & 

 Bonpland, published (HBK. Nov. Gen. et Spec, iv.) descriptions of six 

 species of Etqmtoritim from Peru, all being new to science. In 1836 

 the eldest DeCandolle (Prod, v.) indicated the Peruvian occurrence of 

 twenty-one species of the genus, but several of these have subsequently 

 dropped into synonymy or passed to other genera such as Opliryosporus 

 and Hdogyne. Poeppig in 1845 (Nov. Gen. ac Spec, iii.) added to the 

 group five Peruvian species. Of these, however, at least two have since 

 fallen into synonymy. In 1857, Weddell (Chlor. And. ii.) ascribed six 

 species of Eupatorium to Peru, of which four were described as new, two 

 of them being his own and the other two being species proposed but 

 never characterized by Schultz-Bipontinus. In 1876, Baker (in treating 

 the genus Enpaiorhim for von Martius's Flora Brasiliensis vi. pt. 2) 

 incidentally mentions eleven species as extending into Peru. In 1883, 

 OliA'er (in Hook. Ic. xv. t. 1462) added an interesting species secured 

 by John Ball. Klatt (Abh. Nat. Gesellsch. Halle, xv. and Ann. Nat. 

 Hofmus., Vienna, ix.) described two new Eupatoriums from Peruvian 

 material. Finally Hieron^Tiuis (in Engl. Bot. Jahrb. xxix., xxxvi., xl., 

 and Verh. Bot. Ver. Brandenburg, xhiii.), after working over collections 

 chiefly of von Jelski and of Weberbauer, mentions or discusses some 

 twenty-eight species and varieties of Peru\'ian Eupatoriums, nineteen 

 of these being characterized as new. 



At no time has any effort been made to catalogue the Peru\-ian mem- 

 bers of this group as such or to synopsize or key them. The present 

 paper is put forth to assemble data previously scattered and to place 

 on published record several species found in material recently worked. 

 It is hoped that the treatment, while representing merely a stage in the 

 course of work still in progress, will furnish what has certainly never 

 before existed, namely, a means of speedy and accurate identification 

 of the Peru^'ian Eupatoriums, besides adding some new elements to 

 the group. 



To save space, references are made where possible to the sectional, 



