Fink; Hermann Edward Hasse 
245 
ments in letters to the present writer. How many of these still 
remain imdescribed, could only be determined by a comparison of 
Doctor Flasse’s correspondence with the three lichenists named 
with the lists of new species published as a result of his many 
years of collecting. 
Doctor Hasse’s work grew constantly in interest and impor- 
tance from 1895, when his first contribution appeared until the 
time when his largest contribution appeared in 1913. The genus 
Hassea and several species were dedicated to him. The total 
number of new species resulting from. his collecting in southern 
California in twenty-five years is not far from 75. “The lichen 
flora of Southern California,” published in 1913 by the Smith- 
sonian Institution, a manual of 145 pages, containing descriptions 
of about 400 species of lichens, with good keys, is a fitting monu- 
ment to his industry and his knowledge of the lichen flora of the 
region covered. As will be noted in the list of titles to follow, a 
number of additions to the flora of the region were made after 
the appearance of this work. 
In 1906, Mr. John I. Kane presented to the New York Botan- 
ical Garden about 3,000 species and many duplicates from Doctor 
Hasse’s herbarium. After the death of Doctor Hasse, a large 
collection of lichens was purchased for the Cryptogamic Her- 
barium of Harvard University from Mrs. Hasse. The collection 
now at Harvard must be the one used by Doctor Hasse in his 
final work on the lichen flora of Southern California. 
List of Papers by Doctor Hasse 
Lichens of the vicinity of Los Angeles. I. Erythea 3: 41-44. 1895. 
A list of 90 lichens with habitats. Rinodina angelica and Verrucaria 
plumbaria were named by Doctor Stizenberger. 
Lichens of the vicinity of Los Angeles. II. Erythea 4; 96—98. 1896. 
A list of 29 lichens with habitats, determined by Doctor Stizenberger. 
Lichens of the vicinity of Los Angeles. III. Erythea 4: 106-108. 1896. 
A list of 56 lichens with habitats. Lecanora redimita and Biatora 
phaeophora were named by Doctor Stizenberger. 
Lichens of the vicinity of Los Angeles. IV. Erythea 4: 150, 151. 1896. 
A list of 17 lichens, mostly determined by Doctor Farlow. 
New species of lichens from Southern California as determined by Dr^ W. 
Nylander and the late Dr. Stizenberger. Bull. Torr. Bot. Club 24; 445— 
449. 1897 - 
Descriptions of 19 new lichens as follows: Parmelia subolivacea Nyl., 
