OF ARTS AND SCIENCES: MAY 13, 1873. 



573 



P. diversifolia ; P. dissecta ; P. Plat- 

 tensis. 



P. Dnnnmondii=F. dissecta. 



P. Egedii — Y. Anserina, var. 



P. fastigiata ; P. gracilis. 



P.ferruginea = P. arguta. 



P. Jissa = P. glandulosa. 



P. flabellifolia = P. gelida. 



P. flabdliformis = P. gracilis, var. 



P.floribunda = P. fruticosa. 



P. frigida = ~P. emarginata. 



P. glaucophylla = 'P. dissecta, var. 



P. glutinosa = P. glandulosa. 



P. gossypina = P. effusa. 



P. Gra?nlandica='P. emarginata. 



P. grossa = P. Norvegica. 



P. hirsuta ; P. nivea ; P. Norvegica. 



P. holosericea = P. Pennsylvania, var. 



P. Jamesoniana='P. nivea, var. 



P. Keilhavii = P. pulchella. 



P. Labradorica — P. Norvegica. 



P. leucochroa = P. fragiformis, var. 



P. leucophyUa^'P. Hippiana. 



P. lucida = P. fragiformis, var. 



P. milkgrana; P. Norvegica; P. ri- 

 val is. 



P. minima ; P. frigida. 



P. Missourica — P. Pennsylvania. 



P. Monspeliensis = P. Norvegica. 



P. Morisoni = P. Norvegica. 



P. multijuga = Horkelia California, 

 var. 



P. nana = P. emarginata. 



P. Newberryi = Ivesia gracilis. 



P. nivalis, Torr. = Geum Rossii. 



P. nivea; P. emarginata ; P. gracilis. 



P. NuUaUii—¥. gracilis, var. 



P. olopetala='P. gracilis, var. 



P. opaca ; P. maculata. 



P. Oregana — Y. glandulosa. 



P. jmradoxa = P. supina. 



P. pectinata = P. Pennsylvania, var. 



P. Pennsylvania ; P. arguta ; P. Hip- 

 piana. 



P. pentandra = P. rivalis, var. 



P. procumbens ; P. nemoralis. 



P. prostrata ; P. nivea. 



P. pulc/iella ; P. humifusa. 



P. pulcherrima = P. gracilis, var. 



P. pumila = P. Canadensis. 



P. reel a ; P. gracilis. 



P. retusa = P. tridentata. 



P. rigida ; P. gracilis, var. 



P. Robbinsiana = P. frigida. 



P. rubricaulis ; P. dissecta ; P. Hippi- 

 ana ; P. Pennsylvania. 



P. rupestris — 'P. glandulosa. 



P. Salisburgensis = P. maculata. 



P. sarmentosa = P. Canadensis. 



P. sericea ; P. Pennsylvanica ; P. Plat- 

 tensis ; P. pulchella. 



P. simplex — P. Canadensis, var. 



P. Tormentilla = P.- nemoralis. 



P. Valdiana — P. nivea, var. 

 P. verna ; P. emarginata. 

 P. villosa = P. fragiformis, var. 

 P. Wrangelliana = P. glandulosa. 



Revision of the extra-tropical North American Species of the 

 Genus Oenothera. — By Sereno Watson. 



The limits of this genus are retained as defined in Torrey & Gray's 

 Flora, and by Bentham & Hooker, though Godetia and Boisduvalia 

 might be removed from it with apparent safety. These sections are 

 more nearly allied to Clarkia and Eucharidion, and are characterized 

 by a similar attachment of the anthers to the filament by a broad 

 and somewhat cordate base, by the same purple or lilac color of the 

 petals, which in some species become strongly lobed, and (in Godetia) 

 by the unusually uniform shape of the seeds, which resemble those of 



