Plant Lore of Shakespear

Towne, Rosa [Illustrator]

The Chocolate Tree: A Natural History of Cacao

Young, Allen M.

Field Guide to the Orchids of Costa Rica and Panama

Dressler, Robert L.

100 Butterflies and Moths: Portraits From the Tropical Forests of Costa Rica

Miller, Jeffery C.; Daniel H. Janzen; Winifred Hallwachs

Myxomycetes-A Handbook of Slime Mold

Stephenson, Seven L.; Henry Stempen

Kakteen an ihren Standorten

Rauh, Werner

Free-Living Freshwater Protozoa- A Colour Guide

Patterson, D.J.; S. Hedley

Bulbs-[Revised Edition]

Bryan, John E.; F.I. Hort

Clivias

Koopowitz, Harold

The World of Hoyas: A Book of Pictures

Kloppenburg, Dale; Ann Wayman

An Encyclopedia of Cultivated Palms

Riffle, Robert Lee & Paul Craft

The Various Contrivances by Which Orchids Are Fertilized by Insects

Darwin, Charles