MICHIGAN ACADEMY OF SCIENCE. 85 



specific name to it, it was tliroiigh a misidentification and resulted 

 in a niisa]»])lication of the name. The American ])hint can not be 

 considered as s])ecifically different from that of Europe. The 

 sterile frond is extremely variable as to the degree of dissection 

 and tliis fact lias led to the description and naming of several varie- 

 ties or species based on the degree of division of the sterih^ lamina. 

 It is a very common fern in Keweenaw Co., delighting mostly in a 

 rich humus, consisting of moulding and decaying leaves, under- 

 neath deciduous shrubs and trees but not disdaining to come out 

 into the open where it may be found in grassy ]»atches when it is 

 almost completely hidden from view. I have seen large colonies 

 of it and almost every form immaginable is to be found in such a 

 colony: this fact alone proves that the various forms are of one 

 and the same species. The typical form has the sterile blade ob- 

 long or ovate, simply pinnate with the more or less distant ])innae 

 lobed or pinnatifld, the lowest pair somewhat longer than the 

 others. No. 1612a, August 25, 1898, Keweenaw Co. 



BOTRYCHIUM MATRICARIAEFOLIUM A. Br. var. RHOMBEUM (Aug- 



strom), X. Comb. 

 Botnjcliium Lunariu var. rhonideuni Angstrom, Bot. Not., 70, 



Botrychium 3Iatricariaefolii(iii var. suhintegnnu Milde, Mon. der 

 deutchs. Ophiof/los. 14, 185G. 



Boti-f/chium ramosnm var. neglectittn (Wood) Farwell, Mich. 

 Acad. Sci., 6, 200, 1901. 



This is a sim})le form of the sterile frond which is 1 or 2 inches 

 long, simply pinnate Avith 3-9 nearly equal, rounded, oval, or ob- 

 long, obtuse, pinnae, more or less toothed or incised. No. 018. July 

 26, 1888, in moist shady woods in Keweenaw Co. No. 2714, June 

 ItJ, 1012. in oi)en, moist, sandy fields, near Algonac. 



Botrychium Matricariaefolium var. compositum Milde. 



This variety has the lowest pair of ])innae much elongated and 

 pinnate so that the whole frond a])pears to consist of three sub- 

 equal and similar divisions. No. 1612, August 22, 1898, in maple 

 and oak woods in Keweenaw Co. 



Botrychium dissectum Spreng., Anle;t., 3, 172, 1804. 



Botrychium lunarioides var. dissectum. A. Gr., Man. Bot., 635, 

 1848. 



Dissectvni is the earliest specific name for that group of forms 

 that has been passing as Botrychium obliquum and hence Spren- 

 gel's name should be restored. The ultimate divisions are ovate 

 or oblonglanceolate, incisely toothed. In moist thickets <Tnd fields, 

 Detroit, rare. No. 1975, June 18, 1906. 



