Piper (plant)

Lore & Background

Most Piper species are herbaceous or vines, with some growing as shrubs or small trees. They belong to the magnoliids, neither monocots nor eudicots, and are most closely related to the lizardtail family (Saururaceae). The earliest fossil, †Piper margaritae from the Late Cretaceous of Colombia, indicates extensive diversification during the Cretaceous, coinciding with the final breakup of Gondwana. An earlier potential record, †Piper arcuatile from the Cenomanian to Santonian of Yukon, is less reliable.

The largest number of species are found in the Americas (about 700), with about 300 from Southern Asia, 40 from the South Pacific, and 15 from Africa. The American, Asian, and South Pacific groups appear monophyletic; the affinity of African species is unclear. Some species are sometimes segregated into genera such as Pothomorphe, Macropiper, and Ottonia, but other sources keep them in Piper.

Piper species have a pantropical distribution, often dominant in lowland tropical forest understories. Some live in mutualism with ants, and fruits (peppercorns) are dispersed mainly by birds and small fruit-eating mammals. Despite chemical defenses, some herbivores like the sematurine moth Homidiana subpicta and flea beetles of the genus Lanka have evolved resistance.

Reader's Guide

Piper is significant for its wide range of human uses, most notably as a source of black pepper (P. nigrum), which has been a major spice in international trade since classical antiquity. By the late Roman Empire, black pepper was used more frequently than salt or sugar in some contexts. In the Middle Ages, traders were nicknamed 'Pfeffersäcke' (pepper-sacks) in German Hanseatic towns, and later wars were fought over control of spice supplies. Other species like long pepper (P. longum), cubeb (P. cubeba), and West African pepper (P. guineense) are also important spices. Leaves of species such as hoja santa (P. auritum), lolot (P. lolot), and wild betel (P. sarmentosum) are used in cooking. Medicinally, cubeb has been used in folk medicine, black pepper essential oil in herbalism, and long pepper in Ayurveda. Betel (P. betle) leaves are used as a stimulant, while kava (P. methysticum) is used for its depressant and euphoriant effects, though kava pills have shown hepatotoxicity. Ecologically, many Piper species are threatened by unsustainable logging, while others like spiked pepper (P. aduncum) have become invasive. The genus also provides ornamentals for gardens and indoor pots.

Did You Know?

• The earliest reliable fossil of Piper is †Piper margaritae from the Late Cretaceous of Colombia.
• The largest number of Piper species (about 700) are found in the Americas.
• Some Piper species, such as Piper cenocladum, live in mutualism with ants.
• Kava (Piper methysticum) is used in the Pacific region to produce a calming drink, but pills containing whole plant parts have shown hepatotoxic effects.