516 



Aspidium tanacetifolium. Rupr. I. c. III, p. 37> IV, p. 93. 

 Lastrea spinulosa. Presl Pteridogr. p. 76. 

 Lastrea dilatata. Presl /. c. p. 77. 



Thelypteris minor pinnulis argute denticulatis et molliter spinosis. Amman in 

 Comment. Acad. petropol. X, p. 301, t. 23 (verosimillime). 



Hab. in Rossia arctica [Lapponia! (Schrenk pl. exs. , Baer, Rupr.) , terra 

 Samojedarum in peninsula Kanin et pr. Mesen (Rupr.)] , septentrionali 

 [Fennia (Schrenk t» litl.)] , media [Petropoli (Amman , Weinm. , Rupr.), 

 insula Hochland (Schrknk e Rupr.) , Livonia! (Ledeb.) , Curonia! (Lindem.), 

 Lithuania (Eichw.), Warsawia (Rupr.), Volhynia (Bess.), Mosqua (Mart., M. 

 a Bieb. e Rupr.) , Wiatka (C. A. Meykr)] et australi [Podolia (Eichw.), 

 Ucrania (Rupr.)], provinciis caucasicis [Radscha et Mingrelia (C. Koch 

 in lilt.)~\ , Sibiria uralcnsi (Rupr.) , in m. Taganai (Meinshausen e 

 Rupr.), pr. Slatoust (Nesteroffsky e Rupr.) , a 1 t a i ca pr. Krasnojarsk 

 (Turcz , in litt.) et baikalcnsi! (Turcz.) , Davuria (Turcz.) et Kamt- 

 schatka (Chamiss.), inque insulis Unalaschka ! (Eschsch. pl. exs.) , Sitcha ! 

 (Bong., Eschsch. pl. exs. , Mertens e Rupr.) et Kodjak (Mert. e Rupr.). 4. 



Varietates, quae a variis auctoribus enuraerantur, formis inter- 

 mediis tam arcte subnectuntur, ut iimites inter illas frustra quaesiverim 5 

 imo non contradiceram , si species No. 4 —7 in unam speciem con- 

 jungerentur. 



8. P. rigidum*. (Dec. Fl. frunc. II, p. 560) frondibus ambitu 

 oblongo-lanceolatis subtus glandulosis bipinnatis , pinnis secundariis 

 lanceolatis pinnatipartitis , pinnulis ovatis oblongisve apice dentatis, 

 dentibus acutis mucronulatis , soris in pinnis secundariis biserialibus, 

 stipite cum rachi et costa pinnarum subtus paleaceis. 



P. rigidum. Koch Syn. ed. 2, p. 979. 



P. strigosum. Roth Fl. germ. III, p. 86. 



Polypodium rigidum. Hoffm. Deutschl. Crypl. II, p. 6. 



Polypodium fiagrans. Virx. Delph. III, p. 843. 



Polypodium Villarsii. Bellakd. App. ud Fl. pedem. p. 49. 



Aspidium rigidum. Swartz Syn. Fil. p. 53. — Willd. Spec. pl. V, p. 265. — 



Fries Summa Veget. Scandin. p. 82. — Ledeb. Fl. all. IV, p. 329? — 



Rupr. in Beitr. z. Pflanxenk. d. Russ. It. III, p. 38. 

 Lastrea rigida. Presl Pteridogr. p. 77. 

 Hab. in Sibiria altaica? (Fl. ait.). 2|. 



113,0. Cystopteris. Bernhardi 



in Schrad. n. Journ. I, 2, p. 26. — Endlicher gen. p. 62. — Meisn. gen. p. 433. 

 — Comment. p. 334. — Presl Pteridogr. p. 92. 



Sori subrotundi, sparsi v. subseriati. Indusium membranaceum, 

 subrotundum v. ovatum, puncto marginis affixum, demum corrugatum 

 et evanescens. 



1. C. fragilis (Bernh. /. c.) frondibus bipinnatis ambitu oblongis 

 lanceolatisve , pinnarum pari infimo quam proxime sequentes breviore, 

 pinnuiis inferioribus lobuiato-pinnatifidis v. basi pinnatipartitis, lobulis 

 obovatis ovatisve vel obiongo-ovatis denticulatis dentatisve , dentibus 

 acutiusculis. 



C. fragilis. Koch Syn" ed. 2, p. 980. - Presl Pleridogr. p. 93. — Fries Summa 

 Veget. Scandin. p. 82. — Besser Enum. p. 39, No. 1286. — Hook. et Arn. 

 in Beechey's Voyage p. 119. 132. — Rupr. in Beitr. %. Pflanssenk. d. Russ. 

 R. III, p. 39. — C. A. Meyer ib. V, No. 14. 



Polypodium fragile. L. Spec. 1553. — Pall. It. III, p. 293. — Georgi It. I, 



