46 
example of a real Japanese garden, planned, constructed, and (in 
part) maintained by Japanese, in a public park in America, with 
the exception of the one in Golden Gate Park, San Francisco. 
The cost of the improvements was met this year (as for several 
years past) by a gift of $500 by a donor who wishes to remain 
anonymous. 
The Iris Collection, extending for about 600 feet on either side 
of the brook, has been replanted, primarily for the purpose of se- 
curing better cultural conditions for the forms of Japanese Iris. 
Lhe Systematic Section has been enriched and revised in various 
orders and families, and other work done as noted in the appended 
report of the curator of plants. 
Ecological Section—In addition to fe genetic investigations, 
Doctor White, curator of plant breeding, has continued in charge 
of the Ecological Section on the grounds, where the effect of 
various environmental factors in modifying the hereditary ex- 
pression of various plants is demonstrated by living individuals. 
For the first time in the Garden the relation between the forming 
of seed in the Yucca, or Spanish bayonet plant, and the moth, 
Pronuba, could be easily demonstrated, owing to the large number 
of the moths. The rapidity of multiplication of the water fern, 
Alcolla, in this section created enough interest to reach many news- 
papers outside of New York, as this plant, escaping from the 
swamp, filled all the pools in the brook below the swamp by 
autumn. Two other demonstrations were str iking, both relating 
to parasitisnm—the dodder (Cuscuta) as a parasite on many dif- 
ferent plants, particularly striking on the sunflower and Jerusalem 
artichoke, and the broom-rapes (Orebanche sp.) that live on the 
roots of hemp, English ivy, and other plants. In Southeastern 
Europe, species of these broom-rapes are a serious pest on culti- 
vated crops such as potatoes. The species we are growing, how- 
ever, are not dangerous in this country. 
Lhe Horticultural planting has included about 50,000 bulbs, 
“naturalized” in the lawns (about 40,000), or planted in the 
Rock Garden, and in beds, as noted more in detail in the dpnuaty; 
1924 issue of the Recorn, 
Lhe Collections of Living Plants have increased by gift and 
exchange, and by purchase solely from private funds for which 
