176 PROCEEDINGS OP THE AMERICAN ACADEMY 



A. PEREGRiNus. Solander's species in herb. Banks., near to A. 

 salsitginosus, Richardson, if not a pubescent form of it. 



A. sTRicTus (not of Poiret). A reduced and boreal form of A. 

 radula, Ait.; same as A. bijlorus, Michx. 



XI. Species of the Atlantic United States originating in De Candolle, Prodi: 



V. 1836. 



A. PATEXTissiMus, Lindlcy, in DC, is a form of A. patens, Ait., 

 with long branches. 



A. AURiTUS, Lindley, in DC, is A. patens, var. phlogifolius. 



A. UROPHYLLUS. ) Also of Lindlcy ; may both be referred to A. 



A. HIRTELLUS. J sagittifoUus, Willd. 



A. Drummondii, Lindley. A recognized heterophyllous species 

 of the Mississippi Valley, but ambiguous between A. sagittifoUus and 

 A. undulatus. 



A. ciLiOLATDS, Lindley. A reduced form of A. paniculatus, Ait., 

 that is A. Lindley anus f Torr. and Gray. 



A. C-iERULESCENS. Spccies to be admitted, yet has seemed to pass 

 into A. salicif alius, Ait. 



A. MULTiCEPS, Lindley. Only the A. oblongifolius, Nutt., from 

 St. Louis. 



A. SUBASPER, Lindley. A. salicifolius, Ait., var. subasper. 



A. HEBECLADUS. "| Texau forms of the polymorphous A. multi- 



A. SCOPARIUS. i florus^ Ait. 



A. HiRSUTiCAULis, Lindley. A narrow-leaved and hairy variety 

 of A. diffusus, Ait. 



A. STENOPHYLLUS, Lindley. Narrow-leaved form of A. salicifo- 

 lius. Ait. ; or the specimen sent to Nees may be the nearly related 

 A. paniculatus, Lam. 



A. BiFRONS, Lindley. A. diffusus, Ait., var. bifrons. 



A. MiCROPHYLLUS, Torr. in Lindley, adn. This is A. cdnalus, 

 Nutt., earlier published. 



A. AZUREUS, Lindley. A well-recognized heterophyllous species. 



A. RETROFLEXUS, Lindley. Apparently same as A. thyrsijlorus, 

 Hoffm. 



A. TDRBiNELLUs, Lindley. A well-recognized and very distinct 

 species. 



The species of the high northern and of the western portions of 

 North America, of which several originate in De CandoUe's Prodromus, 

 are not here considered. 



