666 UNDERWOOD: FERNS OF THE PHILIPPINES 
founder left it. A few ferns were collected by Vidal and included 
in his Revision (1886), and his Catdélogo (1892) both printed at 
Manila, but these works contained no additions to the fern flora 
and their determinations are to say the least of doubtful value. 
More important were the collections of Professor J. B. Steere, 
of Michigan University, who visited the islands between 1870 and 
1875. The ferns of the Steere collection were worked over at 
Kew by M. W. Harrington,* who described a few species as new 
and made numerous additions to the known flora. The originals 
of the Steere collection are at Michigan University and a fair series 
of duplicates is at Kew. 
A still more important collection of Philippine ferns was made 
in the years 1890-97 by A. Loher, a Bavarian traveler, which 
was almost as extensive as the earlier one of Cuming. Dr. H. 
Christ,t of Basel, studied Loher’s collection, and his enumeration 
comprises 271 species, including many additions to the known 
flora and a number of new species. 
Finally Herr O, Warburg, who has for years made a special 
study of the flora of the monsoon region, traveled in Luzon and 
the southern portion of Mindanao and made extensive collections. 
His ferns were studied by Dr. Christ and are listed in the first 
volume of Monsunia,t where Dr. Warburg has also given an €x- 
ended revision of the species of Se/aginella of the entire Indo- 
Pacific region from Japan to Australia. Many species were thus 
added to the Philippine flora, including quite a number of new 
species, especially in Se/aginella. 
The fern flora of the Philippines as known to-day embraces 
Over 600 species, and it may be said that collection has only com- 
menced. It is probable that when the area is fully explored the 
extensive archipelago so lately come into our possession will yield 
at least half as many more species. In order to furnish our 
botanical residents and travelers in the Philippines a means of un- 
* Harrington, M. W. The Tropical Ferns collected by Professor Steere in the 
years 1870-75. Jour. Linn. Soc. 16: 25-37. 1877. 
+ Christ, H.  Filices Insularum Philippinarum. Bull. Herb. Boiss. 6: 127-154 
189-211, p/. 2-4. 1898. 
¢ Warburg, O. Monsunia, Vol. 1, 1900. Filicinae, by H. Christ, pp. 54-94 
p/. 2; Rhizocarpaceae, Equisetaceae, Lycopodiaceae and Selaginellaceae, by O. War- 
burg, pp. 95-136. f/. 3, 4. 
Sarat aaa tg ae 
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