FOSSIL PLANTS. 



Lesquereux, Report Geol. Survey of Illinois, vol. iv. p. 410. 

 Sauveur, Veg6t. Foss. cle la Belgique, pi. xix. fig. 2, and pi. xxi. 

 Un^er, Synop. Plant. Foss. p. 63 (in part). 

 Genera et Species, p. 116 (in part). 

 Pseudopecopteris trifoliolata. 



Lesquereux, Coal Flora in Pennsyl. p. 217. 



Sphenopteris laiifolia, 



Lindley and Button, Foss. Flora, vol. ii. pi. clvi., vol. 111. pi. clxxvui. 



Pecopteris, sp. (= Sphenopteris irregidaris.} 

 Crepin, Bull. Soc. Koy. Botan. Belgique, vol. xx. part 11., pp. 24 and 2.x 



? Sphenopteris botryoides. 



Ettingshausen, Steinkf. v. Radnitz. p. 38. 



Schimper, Traite" d. Paleont. Ve"get. vol. i. p. 373. 



Sternberg, Vers. ii. p. 63. 



Stur, Jahrbuch d. k. k. Geol. Reichsanst. vol. xii. p. 143. 



Unger, Synop. Plant. Foss. p. 64. 

 Genera et Species, p. 117. 

 ? Cheilanthites botryoides. 



Goppert, Syst. Fil. Foss. p. 247. 

 ? Diplothmema botryoides. 



Stur, Culm Flora, heft 2, p. 230. 



Sternberg, Vers. i. fasc. iv. p. 19, pi. xxvi. fig. 1. 



Remarks. Crepin,* who has carefully examined Sphenopteris nummularia, 

 Gutbier, S. convexiloba, Schimper, S. (Pecopteris) neuropteroides, Boulay, and 

 S. trifoliolata, Artis, sp., thinks that these may be found eventually to be all 

 varieties of S. irregularis Sternb., which last- mentioned species has been shown 

 by Zeillerf to be identical with S. obtusiloba, Brongt. 



Gutbier J gives as a synonym to his Sphenopteris nummularia, the plant 

 figured by Lindley and Hutton as S. latifolia, Brongt., but Lindley and 

 Button's plant is now generally recognised as S. obtusiloba, Brongt. ( = S. 

 irregularis, Sternb.). Gutbier also further states on p. 75 of the same work 

 that he is strongly inclined to regard S. irregularis, Sternb., as only a variety 

 of S. nummularia with somewhat irregular pinnules. 



GemitzH accepts this view, and unites S. nummularia, Gutbier, with 

 S. irregularis, Sternb. I have, however, kept separate from S. obtusiloba, 

 Brongt., S. nummularia, Gutbier, but followed ZeillerlT in uniting with the 

 last-mentioned fern S. convexiloba, Schimper. 



Subsequent investigations may show S. nummularia, S. convexiloba, S. neurop- 

 teroides, and S. trifoliolata to be* only forms of S. obtusiloba ; but from what is 

 at present known, I think we must regard as distinct species, S. obtusiloba, 

 S. nummularia, and S. neuropteroides. 



In the references I have excluded S. obtusiloba, mentioned by Goppert in 

 his Foss. Flora d. Silur. Devon, u. Unter Kohlenformation (p. 487), as it is 

 probable that a specimen of S. foliolata, Stur, or S. distans, Sternb., has been 

 in this case mistaken for S. obtusiloba, Brongt. 



^ S. distans has already been identified in error by Ettingshausen** as 

 S. obtusiloba, and as imperfect specimens of S. foliolata and S. distans 



* Bull. Soc. Roy. de Botan. de Belgique, vol. xx. part ii p. 31. 



t Veget. Foss. du Terr. Houil. de la France, p. 40. 



t Vers. d. Zwick. Schwarzkohl. p. 43. 



Foss. Flora, pi. clvi. 



|| Bull. Soc. G6ol. France, 3 e ser. rol. xii. p. 192. 



IT Vers. d. Steinkf. in Sachsen, p. 14. 



** Foss. Flora d. Miihr-Schlesischen Dacbsch. p. 22, fig 6 



