NOTES ON THE MICHIGAN FLORA. II. 



OLI\'KR ATKIKS FAIIWEIX. 



Ill tlu> Mi(liij,':iii Floiii' tlie t'lmiiu'ratioii iK^jjiiis with tho » )i»lii();;lussaci>ii(', 

 prosuuiably iiiidor the supposition that this family is the most i)riniitive <»f 

 tlie Filicnles. In these notes tlic order of genera is that of (iray's Manual, ed. 7. 



POrAI'ODIACEAE. 



PheijopteivH Jiubcrtiuna (Hoftm. ) A. Br. is to be looketi for in MirhigaB 

 as its range crosses the state. 



Allosorus and Cheilantlies were itublislied in the .same year, the former 

 appearing first. It was based on the "Adianta spuria" of Swartz, some nine 

 species, eigiit of which were included in Cheilanthes by Swartz, who referred 

 Allosorus as a synonym to his Cehilanthes. Since Allosorus was based not on 

 one species but on all the "Adianta spuria" (nine species) of Swartz, the name 

 must therefore he retained for that group containing the larger nimdier of 

 species which are congeneric. Also according to the Vienna Code, Article 45, 

 "If .... one of the parts detached contains a great many more sj^ecies 

 than the others, the name is reserved for that part of it." Of the nine species 

 on which Bernhardi founded Allosorus, Swartz referred eight to his Cheilan- 

 thes, creating a new genus, Mohria, for the other. Tlie majority of the species 

 on wliich Bernhardi founded Allosorus are unquestionaly congeneric with those 

 species on which Swartz foimded his Cheilanthes and the two generic names 

 are synonymous. Art. 46, "When two or more groups of tlte same nature are 

 united, the nauio of the oldest is retained." As Allosorus is older than Cheil- 

 anthes the latter must give way to the former. This may be deplorable, but 

 no other conclusion can be arrived at under the Vienna Rules. 



Allosorus lanosa (Mx.) n. comb. {Nephrod4um lanosum Mx. Fl. Bor. 

 Am., 270, 1803). The range of this species crosses Michigan; it should be 

 looked for in the rocky sections of the Upper Peninsula. 



I have been informed by Dr. H. T. Darlington of the Michigan Agricul- 

 tural College that the specimens of Pellaea atropiirpiirea (L.) Link from 

 Michigan have a glabrous rhachis and racliiola which proves our plant to 

 be P. glahella Mett. 



iRi-nl, W. .T., MicliiKiiii Kloni. A list of tln> FtTiis anil SimmI I'lants (irowiiig with- 

 <iut cultivatiiiii. ( Kcprintcd from Fil'th Ut'iw)rt of thfi Mk-higuii Acadciiiy of Science, 

 1!)04.) Laii.siiiK'. I'.tO-l. 



^lii llic rcu'iiiii of (iniy's Mininiil tln-rt; arc three other Kpccies of the genus. These 

 are Allosorus AliihiiinctiHis (Hiickley) O. K. ; AUonorun tomcvtitsun (Tiiiik) ii. coiiih. 

 {t'hi ilinithis tomi ntosd Link, Ihtrt. Berol. 2, 42, IK.'-!.".) ; AUoHorun (jrncilia (ifee) n. 

 eoml). (M\irioptiiif< yrariUs Fee, (ieii. Fil. 1 .">(», 1S.^>02). The earlier A. f/riiriliB of 

 I'resl. is n synonym of Cr;/lito(jnimma Stdhri (IJniel.) rranll. and cannot interfere with 

 the use o'f the name ""gracilis" tav this species. 



21st Mich. Aca4. Bel. Kept., 1010. 



