ADDITIONS TO THE FLORA OF GUAM 
By E. D. Merrill 
Botanist, Bureau of Science 
In 1914 I published an enumeration of the plants of Guam 1 
in which about five hundred fifty species are included. Since 
that paper was published some additional collections have been 
made in Guam by Mr. Peter Nelson, of the Guam Experiment 
Station, and in the early part of 1918 a grant of 50 dollars was 
made to him from the income of the Robinson Memorial Fund 
of the New York Botanical Garden for the purpose of assisting 
him in the prosecution of field work in Guam. The arrangements 
under which this grant was made were that the material collected 
should be submitted to me for identification; one set to be re- 
tained for the herbarium of the Bureau of Science; one set to 
be returned to the Guam Experiment Station ; and the remaining 
duplicate material to be transmitted to the New York Botanical 
Garden for distribution by that institution. 
Shortly after the field work was commenced by Mr. Nelson, 
Guam was visited by an unusually severe typhoon, July 6, 1918, 
resulting in considerable damage to the equipment of the Ag- 
ricultural Experiment Station there and in the destruction of 
the field outfit that had been provided for Mr. Nelson’s botanical 
work, and a considerable amount of prepared botanical material. 
The field work was consequently delayed as several months 
elapsed before it was possible to replace the destroyed equip- 
ment. The collections already made have yielded several spe- 
cies and representatives of a few genera, new to Guam, as well 
as at least two undescribed species. These data have been in- 
corporated in the present paper, together with a few changes 
in nomenclature. 
SCHIZAEACEAE 
SCHI2AEA Smith 
SCHI2AEA DICHOTOMA (Linn.) Sm. in Mem. Acad. Turin 5 (1793) 
422, t. 9, f. 9. 
Guam, Nelson 221, on tree trunks at Cotot, associated with 
Psilotum nudum Griseb. A widely distributed species in the 
Old World Tropics, the genus new to Guam. 
1 Philip. Joum. Sci. 9 (1914) Bot. 17-155. 
539 
