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SUGGESTED ITINERARY 
Horticultural Section 
Entering at the Eastern Parkway Gate (number 1),? the visitor 
finds himself at once in the Horticultural Section, comprising 
chiefly horticultural varieties of trees, shrubs, and herbaceous 
plants derived by plant breeding from wild species. 
This section occupies what is known to the Garden authorities 
as the “ North Addition,” since it was not in the original tract set 
aside by the City for botanic garden purposes. It is still (1929) 
in its early developmental stage, its development having been de- 
layed (now for several years) for lack of funds. 
What are Horticultural Varieties? 
It may be noted here that the particular kinds of wild plants 
are called species. Under cultivation new forms often arise not 
found growing wild; they may arise from wild species or from 
other cultivated forms. These are called “garden forms” or 
“horticultural varieties,’ and may arise in at least three ways: 
I. Seed variation; 2. Bud variation; 3. Crossing or hybridizing. 
1. Seed variation: One of the best known horticultural varieties resulting 
from seed variation is the famous original Concord Grape, which was pr 
duced by a seed of the wild grape (Vitis Labrusca) planted at Concord, 
Mass., in the fall of 1843 by Ephraim W. Bull. This plant fruited for the 
first time in 1849, and all other Concord Grape vines in the world have been 
derived, either directly or indirectly, from this ‘one by propagation from 
cuttings. The famous “Golden Glow” was derived by seed variation, as 
was also the Burbank potato. 
2. Bud variation: Occasionally one or more of the buds on a plant will 
wae uce branches differing characteristically from the typical branches. 
This is called bud sporting. It is believed to have been the origin of the 
Washington or California Navel Orange. One of the most famous bud 
sports among flowering plants is the Moss Rose. Some Sec va- 
rieties of potato arose by bud sporting, the process being called by farmers, 
“mixing in the hill”’ Among houseplants the Boston Fern (and other 
varieties of Nephrolepis exaltata) arose by bud sporting. 
3. Crossing or hybridizing: Plants are crossed by transferring pollen from 
the flowers of one to the stigmas of the flowers of another. In this man- 
ner have arisen numerous varieties of apples, pears, and other fruits, and 
innumerable varieties of such plants as Iris, Orchid, Peony, Tulip, many 
Roses (e.g., Hybrid Teas, Hybrid Perpetuals), the Lilac, and others. 
1 By consulting the folded map, it will be found easy to begin the walk 
at any entrance and follow the suggested itinerary from that point. 
