The first edition of Exotic Plants has the letters ABCD on page 160. Copyright © 1971 by Western Publishing Company, Inc. Published by Golden Press, New York, N.Y. Cover price is $1.25. The number on the spine is 24416. Part of the Golden Nature Guide series.
The only cover change to Exotic Plants is shown next. Copyright © 1977, 1971 by Western Publishing Company, Inc. Cover price is $1.95. The number on the back cover has a full ISBN number: 0-307-24416-4. Third printing; CD on page 160. The illustrations changed on the back cover. The interesting thing about this version is the title change. Now titled Exotic Plants For House And Garden. Listed as a Golden Guide on the cover and inside front cover. (image #2)
A German version of Exotic Plants exists, titled Tropische Blumen. © 1971, 1977 by Western Publishing Co., Inc. Published by Delphin Verlag, Stuttgart und Zürich, 1977. Printed in Italy by New Interlitho, Trezzano. ISBN 3-7735-2729-2. The cover is about the same as the Golden Press version. The 1977 date refers to this edition being reprinted from the retitled Golden Guide. The contents are the same in all versions. (last image)
The French version is titled Plantes Exotiques. © 1971 by Western Publishing Company, Inc. Publié par les Editions des Deux Coqs d'Or, Paris, 1973.
Image #1 also exists in a large (5 ¼ by 7 ¾ inch) hardcover. The number on the back cover is 64343.
No revised edition exists. Out of print.