Theobroma cacao or five years old. A mature tree may have 6,000 flowers in a year, yet only about 20 pods. About 1,200 seeds (40 pods) are required to produce 1 kg (2.2 lb) of cocoa paste. Historically, chocolate makers have recognized three main cultivar groups of cacao beans used to make cocoa and chocolate: Forastero, Criollo and Trinitario. The most prized, rare, and expensive is the Criollo group, the cocoa bean used by the Maya. Only 10% of chocolate is made from Criollo, which is arguably less bitter and more aromatic than any other bean. In November 2000, the cacao beans
Orto Botanico di Parma umbellatus", "Caltha palustris", "Cyperus papyrus", "Eichhornia crassipes", "Elodea canadensis", "Iris pseudacorus", "Lemna minor", "Nymphaea alba", "Pistia stratiotes", and "Sagittaria sagittaefolia", as well as mature trees including ginkgo, magnolia, "Pinus nigra subsp. laricio", and "Ulmus campestris". Its glass houses contain a tropical section with "Dracaena fragrans", "Ficus elastica", "F. benjamina", "Monstera deliciosa", "Tamarindus indica", "Theobroma cacao", etc., as well as epiphytes, orchids, and tropical fruits; and a desert house containing a variety of cacti and succulents. Orto Botanico di Parma The Orto Botanico di Parma, also known as the Orto Botanico dell'Università di Parma, is a botanical garden maintained by the