EOBINSON. — STUDIES IN THE EUPATORIEAE. 27 



attenuatis 5-angulatis fere glabris ; pappi setis aequalibus crassiusculis 

 haud barbatis salmoneis vel roseis attenuatis subpatentibus. — Bale, in 

 Mart. Fl. Bras. vi. pt. 2, 187 (1876). Pachychaeta eupatorioides Sch. 

 Bip. mss. fide Bak. 1. c. — Brasilia : in planitiebus Pro v. Minas Geraes, 

 Lund ; Claussen (hb. Kew.) ; Riedel, n. 421 ; Rio Janeiro, Glaziou, n. 

 14,018 (hb. Kew., hb. Berol.), n. 14,019 (hb. Kew.). 



Species reducendae vel exdudendae. 



0. Burchellii Bak. in Mart. Fl. Bras. vi. pt. 2, 187 (1876) est forma 

 Eupatorii tetranthii Sch. Bip. quod videtur solum forma oppositifolia 

 JE. dentati Gardn. 



0. Chilca (HBK.) Hieron. in Engl. Bot. Jahrb. xxii. 706 (1897) ob 

 antheris distincte appendiculatis certe ex Ophryosporo excludendus est 

 E. Chilca HBK. 



Mandonii (Sch. Bip.) Benth. et Hook, f ex Hook. f. et Jacks. Ind. 

 Kew. ii. 354 (1895) est 0. piquerioides (DC.) Benth. 



0. ovatifoUus (DC.) Benth. et Hook, f ex Hemsl. Biol. Cent. -Am. 

 Bot. ii. 79 (1881), ob antheris obscure appendiculatis et ob affinitate 

 indubia cum aliis speciebus Eupatorii melius nunc ad hoc genus re- 

 ferendus, est vere ab E. polybotryo DC. Prod. v. 174 (1836) nullo modo 

 distinctus. 



0. soUdaginoides (HBK.) Hieron. in Engl. Bot. Jahrb. xxix. 4 (1900) 

 est eisdem rationibus E. soUdaginoides HBK. 



0. solldagiiioides, var. Bonplandianus (Sch. Bip.) Hieron. 1. c. = 

 Eupatorlmn soUdaginoides, var. Bonplandianum (Sch. Bip.), n. comb. 



HI. The Genus Helogyne and its Synonyms. 



Since its publication by Nuttall in 1841 the genus Helogyne has 

 remained an obscure monotype known only from a single fragmentary 

 specimen, collected in Peru and now preserved in the herbarium of the 

 British Museum. The genus has been referred to the Piquerinae by 

 all recent authors who have had occasion to classify it, but Bentham 

 and Hooker, who first expressed this view as to its affinities, particu- 

 larly state that they did not examine the anthers, which alone furnish 

 the crucial character of the subtribe. 



While at the herbarium of the British Museum, the author was 

 kindly permitted to remove one of the very few flowers from a head 

 and make a dissection. The anthers were found to be each supplied 

 with a well-developed terminal appendage, showing clearly that the 

 genus belongs not to the Piquerinae but to the Ageratinae. When 

 transferred to the latter tribe, Helogyne is found to occupy the same 



