2 Rhodora [JANUARY 
extend the records of the species. We are also indebted to Mr. C. E. 
Faxon for his detailed drawings, and to Mr. F. Schuyler Mathews for 
the skillful retouching by which the photographs have been prepared 
for half-toning. 
NOTES ON ARCEUTHOBIUM PUSILLUM. 
HERMANN VON SCHRENK. 
(Plate 12.) 
In the latter part of the year 1871, Mrs. Lucy A. Millington found 
a small mistletoe on the black spruce, Picea Mariana, B.S.P. (P. nigra, 
Ait.) at Warrensburg, Warren County, New York and about the same 
time Prof. C. H. Peck discovered the same plant at Sandlake, Rens- 
selaer County, New York. Specimens were sent to Dr. Engel- 
mann who recognized in the plant an Arceuthobium which he called 
Arceuthobium minutum. Much astonishment was expressed at the 
time that this curious plant had not been found before, and we 
find numerous accounts of it in the periodical literature of that day.? 
Collectors searched for new stations with great zeal and a number of 
these were found in New York (notably in Sullivan County), in 
Pennsylvania, and in New Hampshire. ‘The mistletoe in all these 
localities was confined to the black spruce, growing in cold sphagnum 
bogs. Peck described the plant in 1872, as Arceuthobium pusillum.s 
For many years nothing more was heard of the plant. A number 
of species, many of which had extended ranges, were found on various 
Coniferae in the far west. Recently the interest in this, the smallest 
of the mistletoes, revived and several observers report finding it in 
localities not known before, from Vermont, Massachusetts, and Maine. 
During the past summer a group of white spruces on Monhegan 
Island (near Boothbay Harbor), Maine, was found covered with the 
Arceuthobium. The trees were much stunted, some of them were 
dead, and the living ones formed a striking contrast to their healthy 
neighbors, because of their short yellow leaves. It was thought rather 
1 Bull, Torr. Bot. Club 2: 43, 1871. Proc. Acad, Sci. St. Louis 3: LXXXIII, 
1873 (presented May 20, 1872). 
2 Bull. Torr. Bot. Club 2: 42, 47, 48, 1871; 3: 24, 55, 1872; 4: 15, 44, 1873. 
Proc. Acad. Sci. St. Louis 3: LXXXIII, 1873. American Naturalist 6: 166, 406, 
1872. 
3 Peck, C. H., 25 Ann. Report State Botanist, N. Y., p. 69, 1873. 
