86 EIGHTEENTH REPORT. 



BoTRYCHiuM DissECTUM vai". OBLiQuuM (Muhl.), N. Coinb. 



Botrydiium ohiiqmim Muhl. ox Willd., Sp. PI., 5, 63, 1810. 



Bofri/chitim lunarioidcs var. ohliqwum A. Gr.. ^laii. Bot., 635, 

 1S18. 



The ultimate divisions are crenulate-serrulate. In fields and 

 more frequent than the type. No. 872, October 15, 1895, at Detroit. 



BoTRYCHiuM DISSECTUM var. ELONGATUM (Gilbert <& Harberer), 

 N. Comb. 



Botrychdum o'bliquum var. elougatnm Gilbert & Harberer, Fern 

 Bui., 11, 89, July, 1903. 



Ultimate segments lanceolate, elongated, crenulate-serrulate. 

 Osscasional, No. 35521/2, October 12, 1913, in sandy fields at Algo- 

 nac. 



Botrychium multifidum (Gmel.) Eupr. 



Osmunda multifida Gmel., Nov. Comm. Ac. Petr., 12, 517, t. 11, 

 f.l, 1768. 



Osmunda Matricariae Schrank, Bair. Flora, 2, 419, 1780. 



Botrychium Riitaefolium A, Br. ex. Doll, Khein. Flora, 24, 1843. 



Botrychium ternatmn A Europaeum Milde, Fil. Europ., 199, 1867. 



Botrychium teiiiatiim var. Riitaefolium D. C. E., Fer. N. Amer., 

 1, 149, 1879. 



This species is similar to the last preceding but it is usually 

 larger, more compound in most of its forms, with the ultimate seg- 

 ments ovate or obovate and obtuse. The type is rather a small 

 plant with few, broad ovate, obtuse segments, the lowest sublunate. 

 No. 627, .July 31, 1888, Keweenaw Co., in moist, sandy places; No. 

 2715, June 16, 1912, near Algonac. 



BoTRYCFiiuM MULTIFIDUM var. ONEiDENSE (Gilbert), N. Comb. 



Botrychium obliquum var. Oneidense (Gilbert) Waters in Gray's 

 New Manual, 49, 1908. 



The broadly oblong, obtuse, sub-cordate segments of this variety 

 seem to place it with this species rather than with the preceding. 

 Keweenaw Co., No. 854, July 5, 1895, in moist meadows. 



Botrychium multifidum var. australe (D. C. E.), N. Comb. 



Botrychium tcrnatum var. australe D. C. E.. Ferns N. Amer., 1, 

 149, Plate XX a (largest plant), 1879. 



Botrychium silaifolium Pr., Bel. naeiik, 1, 76, 1825. 



Botrychium occidentale Und., Bui. Torr. Bot. CI., 25, 538, 1898. 



Botrychium obliquum var. Harhereri Gilbert. 



This is the largest form of the species and many individuals carry 

 the sterile lamina of the preceding year well along into the sum- 

 mer so that it may be gathered in good condition with two sterile 



