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much to stimulate an interest in plants and in gardening, and 
are often a source of valuable suggestions to owners and land- 
scape gardeners as to the effective use of shrubs and other plants 
in the treatment of private places and small parks. 
(d) Ivris—The brook and lake, and grounds adjacent thereto, 
afford an ideal condition for a collection of iris. Only a few 
botanical species are at present planted. Scores of species and 
hundreds of varieties could be grown. 
(e) Rhododendrons and Azaleas—An area with north-facing 
slope, near the Malbone St. gate, and adjacent to the terminal 
pool of the brook has been reserved for the azaleas. Provision 
has been made around the lake for the rhododendrons. 
(f) Water-lilies—There are about 40 species, and a large 
number of varieties and hybrids. Many of them are hardy in 
this climate. About fourteen species are now (1917) growing in 
the Garden lake 
(g) Spiraeas—About one half of the 50 or more species are 
hardy in Brooklyn. Several species are already represented in 
our collection. Many valuable horticultural varieties would be 
a useful collection for landscape architects and gardeners to study. 
(h) Hawthorns.—Specialists differ widely in the number oi 
species assigned to this difficult genus (Crataegus). In addition 
to the indefinite number of botanical species there are a large 
number of very beautiful horticultural froms of foreign and 
American species. These shrubs and trees, like the spiraeas, are 
specially valuable from the point of view of landscape gardening. 
(1) Tulips—Of the scores of horticultural forms only very 
few, used in formal bedding, are familiar to the general public. 
Both tender and hardy forms are desired. 
(j) Dahlias—Between 2,000 and 3,000 names of varieties 
have been published in trade catalogs. The Botanic Garden has 
not yet taken any steps toward a dahlia collection. 
(k) Conifers—vValuable for their landscape effect as well 
as for botanical interest. 
4. Books for the Library.—FEspecially desired are complete 
sets of botanical periodicals. Such sets become more rare and 
more expensive each year. 
5. Specimens for the Herbarium—To properly name the col- 
