A CHRISTENSEN BIBLIOGRAPHY 11 
*Ueber einige Farne in O. Swartz’ Herbarium.—Arkiv fér Bot. 
Su: 1-46, 18 f., t. 1-5. 1910. 
*On some species of ferns collected by -Dr. Carl Skottsberg in 
temperate South Ameriea.-Arkay fér Bot. 10751-3832; 4 £.. 1+ 
1910. 
*Four new ferns.—Fedde: Repertorium sp. nov. 9: 370-372. 
911. 
Pteridophyta in insula Quelpaert a cl. P. ope anno 1910 lecta. 
—Bull. Géogr. Bot. Mans 1911: 69-72. 1911 
On the genus Dryopteris—Amer. Fern Journ. 1: 33-37. 1911. 
The Pteridophyta of arctic regions Amer. Fern Journ. 1: 65- 
70. 1911 
The Gonronl American species of rca ae subgenus Eudryop- 
teris—AMER. FERN JourRN. 1: 93-97. 1911. 
*Two new bipinnatifid species of Alsophila.—Fedde: Reper- 
torium sp. nov. 10: 213-214. 1911. 
*On a natural classification of the species of Dryopteris.—Biolog. 
Arbejder tilegn. Eug. Warming: 73-85. 1911. 
Pteridophyta (excl. Selaginella) in H. Ross: Contributions 4 la 
flore du Mexique—Soc. Sci. “Antonio Alzate.’’ Mémoires 32: 
175-199, 1 t. Mexico. 1912. 
*On the ferns of the Seychelles and the Aldabra Group.—Trans. 
Linn. Soc. London II. Bot. 7: 409-425, pl. 45. 1912 
Polypodium Speluncae L. A question of nomenclature. —AMER. 
1. 
*Filices Esquirolianae 1910-1911.—Bull. Acad. int. Géogr. 
Bot. Mans 22 Année: 137-143. 1913. 
*A monograph of the genus Dryopteris. Part I. The tropical 
American Me tifid species. Vid. Selsk. Skr. VII. 
10: 53-282, 46 f. 1 
*Filices neta t. Gazette 55: 331-338. 1913. 
n p 
traetter af danske Botanikere. Kbhvn. 8°. (XXII+ 279). 1913. 
Index Filicum. Supplementum 1906-1912. —Hafniae. 8° (4+ 
132). 13. 
Some Sorcha species of Dryopteris—AMeER. FERN JouRN. 
4: 77-83. 
ie hae Dansk Skoleflora. Sjette endrede Udgavered. 
Kbhvn. 8° (130, 128 f.). 1914 
*New ferns from Madasaavar. —Arkiv for Bot. 14%: 1-8, 2 t. 
191 a 
axonia, a new genus of tropical ferns —Smithsonian Misc. 
PSs 669: 1-4. 1916. 
