Plants are the same, laden with double-meanings. Roses are desire. One rose held would be desire controlled. Being surrounded by an abundant field of roses would mean the fool is in a place where desire grows naturally and unchecked. A garden of roses would be desire cultivated to a pleasing and tame thing for the mind to enjoy.
Trees speak of growth and earthly strengths.
Almost every man the fool will meet has a wooden staff of some sort. It may be carved, gilded, or actually growing leaves as a living branch would do, and each tells the traveler something about the thinking part of the brain by showing what it leans on in its current state of development, as shown in that card. The belief systems of astrology and the Kabbalah make appearances. The numbers involved in the cards are important. The repeating message throughout the cards is wisdom through balance, so two and four will show up frequently.