236 THE CANADIAN NATURALIST. [May 



native of the far-west, introduced from Europe into Maine ; 

 Senecio pseudo-arnica, Less., a plant of Anticosti and northward, 

 detected on Grand Manan Island, off the coast of Maine ; Pole- 

 mon'ium ceeruleum Linn., and Corispermwm hyssopifolium Linn., 

 both western plants, the latter apparently extending eastward ; 

 Rumex patientia Linn., a stray introduction into both countries 

 from Europe, and Sagittaria calycina Engl., also a recent 

 addition to our flora from Grand Manitoulin Island, where it has 

 been collected by Dr. John Bell. 



A hasty enumeration of the number of genera and species 

 shows that, numerically, considerable additions have been made. 

 Of Exogenous plants there are 627 genera and 1842 species, and 

 of Endogenous plants 174 genera and 716 species. The increase 

 has chiefly taken place in the orders Leguminosae, Composite, 

 Naidacege, Cyperaceae, and Graminae. 



Six lithographic plates, illustrative of the genera of the Cyper- 

 aceae, have been added to the fourteen illustrating the Graining 

 and Filices. These will prove useful aids to the young botanist. 



A. T. D. 



Mr. Eaton's elaboration of the ferns is painstaking, able and 

 thorough. Four sub-orders are represented within the limits, 

 Polypodiacese, Schizaeaceas, Osmundaeese and Ophioglossacese. 

 The second of these contains the genera Schizaea and Lygodium 

 which have not yet been detected in Canada. Some changes have 

 been made in the arrangement of the genera composing the 

 Polypodiacese. Phegopteris has been seperated from Polypodium 

 and put next to Aspidium, its proper place, as was long ago 

 indicated by Roth (who included it in his genus Polystichum, 

 the equivalent of Swartz's Aspidium) and by Fee, who founded 

 the genus. Struthiopteris has been removed from Pterideae to 

 Aspidieae and placed next to Onoclea, but not included in that 

 genus, chiefly because of its different venation. Pelkea has been' 

 seperated from Allosorus, the only species which retains the latter 

 name being Alio, acrostichoidcs, an inapt section, inasmuch as 

 Bernhardi's name is not appropriate to any other genus than 

 Cheilanthes of Swartz, and moreover, Robert Brown's well named 

 and well defined genus, Oyptogaunne, was constituted expressly 

 for this species. Sir William Hooker held (probably correctly) 

 that our North American plant was identical with the European 

 C. crispus ; Mr. Eaton appears to consider them distinct. Mr. 



