Cyperus articulatus, also known as Piri-Piri, Priprioca, or jointed flatsedge, is a plant species from the sedge family (Cyperaceae). It is widespread across tropical and subtropical regions worldwide, typically growing in moist areas, along riverbanks, or in swamps, often in dense, grass-like clumps. Its slender, round, distinctly jointed stems — from which its scientific epithet "articulatus" (Latin for "jointed") derives — are its most characteristic feature. The aromatic, dark rhizome holds particular significance for fragrance and incense use: in the Brazilian Amazon, known as priprioca, it has become one of the region's best-known and most valued native fragrance plants, the basis of numerous perfumes and cosmetics marketed for their earthy, woody character. The plant forms dense, grass-like clumps at damp sites along riverbanks and in the wetlands of the Amazon basin, recognisable by its characteristically knotted, aromatic rhizomes, from which the Brazilian name "priprioca" derives. Dried and crushed, the rhizome develops an earthy, woody scent with a faint, almost sweet undertone.

The plant, particularly its rhizomes, has a long tradition in the folk medicine of various cultures, especially in South America and Africa, where fever-reducing, digestive-aiding, and calming properties are attributed to it. In shamanic contexts, particularly in the Amazon region, Piri-Piri is used to deepen the connection to nature, plant spirits, or the spiritual world, and to promote grounding; the root is often burned alongside ayahuasca ceremonies. In some traditions it is also used for love spells or to strengthen relationships, often in combination with other plants — a reputation that has also made priprioca a sought-after "sensual" fragrance note in the Brazilian perfume industry. In Brazil's perfume industry, priprioca has become, over recent decades, a valued domestic alternative to imported fixatives such as vetiver, and increasingly appears in internationally marketed fragrance compositions. In Indigenous communities of the Amazon, the root is also traditionally used in love charms and amulets, in the belief that it draws affection and goodwill.

For incense purposes, the dried rhizomes are what matter most, often traded as "Piri-Piri roots." When burned, they release an earthy, woody, slightly spicy, and sometimes faintly sweet fragrance, often perceived as calming and centering — distantly related in character to vetiver or patchouli, though brighter and less heavy. Traditionally, Piri-Piri is used for energetic cleansing rituals to free spaces or people of negative energy, said to build a protective aura and support concentration during meditation and ritual. Its deep, earthy scent is often compared to vetiver or patchouli, though it carries its own, somewhat sweeter and less rugged nuance.