310 



that it was there shown that the oldest name is Cliftonia nitida, 

 Gaertn. fil. (J 805), but if he had read a Hne further he could 

 hardly have failed to note what Dr. Watson actually did show, that it 

 is Ptelea monophylla. Lam. (1791) ! Rhammis crocca, Nutt, finds 

 a place among the trees, and R, insiilaris, Greene, is reduced to 

 a variety of it. R, arboreus, Greene, is reduced to a variety of 

 R. velutiniis, Dough; all are acknowledged as arboreous. jEs- 

 cuius octandra, Marsh. (1785), replaces ^,flava, Ait. (1789). It 

 is made clear that the sugar maple is to be called A. saccharum, 

 Marsh, while the silver maple becomes A. saccharinum, L. Prof. 

 Sargent fears that this will make '* hopeless confusion," but we 

 think differently, as they are clearly two different words. Ne- 

 gmido Californicum is reduced to a variety of N. aceroides, 

 Rhus integrifolia. Brewer & Wats., of Southern California, is ad- 

 mitted as a tree. Cladrastis thictoria, Raf., becomes C^ lutea 

 (Michx. f) Koch, having been described by the younger Michaux 

 as Virgilia lutea. Cercidium is kept up as a genus, and Parkin- 

 sonia Torreyana, Wats, transferred to it ; C, floridiim, Benth., 

 becomes a tree in the valley of the lower Rio Grande. Acacia 

 Farnesiana, Willd., and A, flexicaulis, Benth., are both admitted, 

 as is Pithecolobium brevifolium, Benth. Vatiquelinia Torreyi, 



Calift 



Crat^^us rivii- 



laris, Nutt., is reduced to a variety of C. Douglasii, CratcEgus 

 viridis, L., replaces C. arborescens, Ell. and C. coccinca is given 

 three varieties ; C. ptuictata is maintained as a species ; C, cor- 

 data. Ait, (1789) must be retained for C. populifolia, (178S), for 

 Walt., the species was first published by Miller as Mespilus cordata 

 (1760); C. berberidifolia, T. and G., is reduced to a variety of 

 C Crus-Galli,znd C, fava, Ait^htcomcs C, Jlexispina (Mcench), 

 Sargent. This critical work on an extremely difficult genus is 

 especially welcome. Terviiiialia Buceras has been detected by 

 Mr. Curtiss on Elliott's Key, Fla. Aralia spinosa has been found 

 in tree-hke dimensions by Professor Sargent in the Big Smoky 

 Mts. Nyssa Ogeche, Marsh. (1785), replaces N. capitata, Walt 

 (1788). Doubt is expressed concerning the correct reference by 

 Prof. Gray of the Arizona Arbutus to A. Xalapensis, H.B.K. 

 Fraxinns aispidata, Torr., is admitted. Nectandra Willdcnoviivia 

 Kees. is referred to N. Catcihvn^.r, ir r,,.^... r„.,.,.T..,^-„r, Mirhx.), 



