16 REPORT OF SUPERINTENDENT OF GARDENS AND GROUNDS. 
REPORT OF THE SUPERINTENDENT OF GARDENS 
AND GROUNDS. 
Sm: I have the honor to submit the following report on the progress 
of operations in the gardens and grounds of the Department : 
The planting of the arboretum has been prosecuted so far as the ap- 
propriations for the purpose would admit, in view of the difficulties 
attendant upon making so thorough and complete a collection as con- 
templated in the plan. The work of procuring plants for the special 
collections proposed for the green-houses has necessarily occupied much 
time and attention, and the comparatively slow progress of making these 
selections is readily accounted for, inasmuch as but few of the required 
plants are to be found in commerce, and have to be procured from their 
native habitats, or by exchange from collections attached to scientific 
institutions and botanic gardens in foreign countries. Valuable addi- 
tions are constantly being received, and the collection is already of great 
variety and interest. 
The accompanying plan of the grounds represents the position of the 
various genera of plants, and other details, which are indicated by figures 
and letters corresponding with the following 
REFERENCES TO PLAN. 
Betulacee.—1, Betula; 2, Alnus. 
Salicacee.—3, Populus; 4, Salix. 
Platanacee.—5, Platanus. 
Juglandacee.—6, Juglans; 7, Carya; 8, Pterocarya. 
Eleagnacee.—9, Eleagnus, Shepherdia, Hippophaé. 
Cupilifere-—10, Quercus; 11, Castanea; 12, Fagus; 13, Carpinus; 14, 
Corylus; 15, Ostrya. 
Tiliacee.—16, Tilia. 
Magnoliacee.—i7, Magnolia, Liriodendroh, Kadsura, Schizandra. 
Hypericacew.—18, Hypericum, Androsemum. 
Saxifragacee.—19, Philadelphus ; 26, Deutzia; 27, Hydrangea, Decu- 
maria; 28, Ribes, Itea. . 
Celastracee.—20, Kuonymus, Celastrus. 
Rosacew.—21, Rubus; 22, Spirea; 23, Kerria; 24, Schizonotus; 25, 
Potentilla; 49, Cydonia; 50, Cotoneaster, Amelanchier; 56, Pyrus; 87, 
Crategus; 88, Prunus; 89, Amygdalus, Amygdalopis. 
Iythracee.—29, Punica, Lagerstroemia. 
_ Menispermacee.—30, Cocculus, Menispermum, Calycocarpum. 
Lardizabalacee.—31, Akebia, Stauntonia. 
Hamamelacew.—32, Hamamelis, Fothergilla, Liquidambar. 
Anonacew.—33, Asimena. 
Styracacew.—34, Styrax, Halesia, Symplocos. 
Bricacee.—35, Gaylussacia, Vaccinium, Chicgenes, Arctostaphylos, 
Epigea, Arbutus, Leucothoé, Cassandra, Cassiope, Andromeda, Oxyden- 
dron, Clethra, Phyllodoce, Pernettya, Kalmia, Daboecia, Menziesia, 
Azalea, Rhododendron, Rhodora, Ledum,,Loiseleuria, Leiophyllum. 
Berberidacee.—36, Mahonia; 37, Berberis. 
Caprifoliacee.—38, Diervilla; 39, Symphoricarpus; 40, Lonicera; 41, 
Leycesteria; 42, Viburnum; 43, Sambucus. 
Rubiacee.—44, Cephalanthus, Gelsemium. 
Calycanthacee.—45, Calycanthus, Chimonanthus. 
