Plantopedia : the definitive guide to house plants

National Audubon Society wildflowers of North America : the complete identification reference to wildflowers--with full-color photographs; updates range maps; common names; and authorative notes on flowering, season, usages, scent, habitat, and conservation status

National Audubon Society mushrooms of North America : the complete identification reference to mushrooms--with full-color photographs; detailed descriptions of cup, stem, flesh, and spore print; and authorative notes on growth characteristics habitat, and conservation status