L. H Bailey
Hortus: A concise dictionary of gardening, general horticulture and cultivated plants in North America
How plants get their names
Plant-breeding;
The nursery-manual;
Gardener's handbook, successor to The gardener;
Harvest of the year to the tiller of the soil
Hortus
Manual Of Cultivated Plants
Manual of cultivated plants most commonly grown in the continental United States and Canada,