434 PKOCEEDINGS OF THE AMERICAN ACADEMY. 



Pringle, the writer finds tliat the anther-bases in Mallinoa are cordate 

 rather than sagittate, the basal auricles being decidely rounded. In 

 Eupatorluiu hcUidifolium fiu'therniore the anther-bases are also retuse, 

 the condition l)eing \ery similar and the difference merely a trifling 

 one of degree and in no sense one of kind. The degree of difference is 

 closely comparable to that shown between fig. 2 and fig. 3 on plate 9 

 of Bentham's classical "Notes" (Jour. Linn. Soc. xiii.). It will be 

 noticed that Bentham, whose experience and judgment upon these 

 matters have probably ne^'er been surpassed, admits the occurrence 

 of anthers of both these types in the Eupatorium tribe (1. c. 360). If 

 admitted to the Eupatoriuvi tribe at all, Mallinoa cannot l)e kept out 

 of the genus Eupatoriuvi as at present delimited. 



Regarding the transfer of Apodocrphala Bak. to the J'crnonicar, see 

 Proc. Am. x\cad. xlii. 32 (1906), and of Lrpidrsmia Klatt to the Heli- 

 antheae, see Proc. Am. Acad, xlvii. 210 (1911). 



Further study, especially of the larger genera, may well reveal 

 profitable generic segregations not as yet clear. This is especially 

 likely to l)e the case among the numerous and as yet very imperfectly 

 known South American members of the tribe. It is also by no means 

 improbable that when these are more satisfactorily represented in 

 herbaria some nc^w and more convincingly natural re-adjustment of 

 generic lines will become possible. Furthermore, it is to l)e remem- 

 bered by users of the following key that disconcerting exceptions and 

 anomalies occur here as elsewhere among the Compositac, as for 

 instance four-, six-, or even seven-angled achenes among the normally 

 5-angled ones in the Ayrratinar, or occasionally calvous achenes in 

 certain heads of the normally pappus-bearing genera Trichogonia and 

 Ageratum. 



Subtr. I. PiQUERiNAE. Antlierac apice omnino exappendiculatae 

 vel a connectivo sursum leviter incrassato et supra loculos plus minusve 

 lateraliter expanso truncate vel retuso terminatae. Achaenia non 

 glandulari-papillifera. 



a. Pappus nullus vel rarissime brcvissime obsoleteque setosus. . 1. PLqueria 

 a. Pappus setosus h. 



h. Pappi setae laeves vel modice scabratae c. 



c. Pappi setae saepissime 10 sursum clavellatae. Folia pleraque alterna 

 3-lobata vel non lobata. Capitula parva numerosa subsessilia 



paniculata 2. Decachaeta. 



c. Pappi setae tenues non clavellatae. Folia opposita dissecta. Capi- 

 tula axillaria longe pedunculata 3. Podophania. 



b. Pappi setae plumosae , , 4. Ophryosporus. 



