DRYOPTERIS 281 
(D) opposita (Vahl) Urban, Symb. Ant. 4. 14. 1903 — Amer. trop. 
Polypodium Vahl, Ecl. Amer. 3. 53. 1807; Aspidium Sw. 1829, Chr. 252 
(non Klf. 1827); Nephrodium Diels 1899. NPfl. 172 (non 177). Aspidium 
conterminum Willd. sp. 5. 249. 1810. Mett. n. 186; Nephrodium Desv. 
1827. HB. 268 (pt); Polystichum Gaud. 1827; Lastrea Pr.1836; Dryo- 
pteris O, Ktze. 1891. (Oochlamys Fée 1850-52) — Polypodium rivulorum 
Raddi 1825; Aspidium Link 1833. Mett. n. 193; Lastrea Pr. 1836. 
opposita O.Ktze. Rev. Gen. PI. 2. 813. 1891 — D. mascarenarum. 
(G) oppositifolia (Hk.) C. Chr. Ind. 281. 1905 — Ins. S. Thomé (Guinea). 
Polypodium Hk. sp. 5. 8, 1863. HB. 316; Phegopteris Kuhn 1868; 
Goniopteris J. Sm. 1875. 
(C?) orbieularis C. Chr. Ind. 281. 1905 — :Malesia«. — Aspidium nephrodioides 
Hk. sp. 4. 42 t. 235. 1862 (non Kl. 1847); Dryopteris O.Ktze. 1891; 
Aspidium Hookeri Bak. 1867. HB. 257 (non Wall. 1829 nec Kl. 1847 . 
(D) oregana C. Chr. Ind. 281. 1905 — California. Oregon. 
Aspidium nevadense Eat. Ferns N. Am. 1. 73 t. 10. 1878 (non Boiss. 
1838); Nephrodium Bak. 1891; Dryopteris Und. 1893. 
(D) oreopteris (Ehrh.) Maxon, Proc. U.S. Nat. Mus. 28. 638. 1901 — Europa. 
Madeira. Japonia. Amer. bor. pacif. (Alaska-Washington). 
Polypodium Ehrh.; Willd. Prod. 292. 1787; Ehrh. Beitr. 4. 44. 1789; 
Aspidium Sw. 1801. Mett. n. 266. Chr. 253; Polystichum Bernh. 1799; 
Lastrea Bory 1826; Nephrodium Desv. 1827; Phegopteris Fée 1850-52; 
Hemestheum Parm. 1899; Polypodium montanu;a Vogler, Dissert. 1781 
(non Lam. 1778); Polystichum Roth 1799; Hemestheum Newm. 1851; 
Lastrea Moore 1857; Aspidium Aschers. 1859; Nephrodium Bak. 1867. 
HB. 271. NPfl. 173; Dryopteris O.Ktze. 1891. 
(D) orientalis (Gmel.) C. Chr. Ind. 281. 1905 — Africa trop. Ins. Mascarenae. 
Amboina. Fiji — Polypodium Gmel. Syst. Nat. 9?. 1312. 1791; P. pecti- 
natum Forsk. Fl. Aeg.-Arab. 185. 1775 (non L. 1753); Arthropteris 
Kuhn 1889; Aspidium Christ 1897. 250; Nephrodium Hier. 1899. 
Aspidium albopunctatum Bory; Willd. 1810. Mett. n. 123; Nephrodium 
Desv. 1827. HB. 264: Lastrea Pr. 1836; Arthropteris J. Sm. 1857; 
Dryopteris O. Ktze. 1891. Aspidium leucosticton Kze. 1850. 
— Nephrodium subbiauritum Hk. 1862. HB. 261; Arthropteris J. Sm. 
1875; Dryopteris O. Ktze. 1891. 
— Nephrodium punctulatum Bak. 1867. HB. 261 ; Dryopteris O. Ktze, 1891. 
— Lastrea articulata Brack. 1854. — Fiji. 
(D) orizabae (Fée) C. Chr. Ind. 281. 1905 — Mexico. 
Aspidium Fée, 8 mém. 104. 1857; Lastrea Moore 1858, 
(P) ornata (Wall) C.Chr. Ind. 281. 1905 — China austr. India bor.-Malesia- 
Australia bor.-Polynesia. — Polypodium Wall. 1828 (nomen); Bedd. Ferns 
S. Ind. t. 171. 1863-65; Phegopteris Fée 1850-52. Chr. 277; Nephrodium 
Christ 1895. NPfl. 177; Aspidium Christ 1897; Nephrodium tenericaule 
Hk. 1862 (sp. 4. t. 269 non pag. 142); N. setigerum pt. HB. 284 — 
Polypodium pallidum Brack. 1854. 
(C) oshimensis (Christ) C. Chr. Ind. 281. 1905 — Liu Kiu. 
Aspidium Christ, Bull, Boiss. II. 1. 1018. 1901. 
(C) otaria (Kze. O.Ktze. Rev. Gen. PI. 9. 813. 1891 — Assam. India austr. 
Ceylon. Ins. Philipp. —  Aspidium Kze.; Mett. Pheg. u. Asp. 34. n. 73. 
1858. Chr. 249; Nephrodium Bak. 1867. HB. 288. NPfÍl. 178. Aniso- 
