Phyllanthaceae
Phyllanthaceae Martinov is an accepted family in the order Malpighiales according to the Angiosperm Phylogeny Group IV (APG IV) and is recognized by Plants of the World Online (POWO) and World Flora Online (WFO). The family comprises approximately 55–60 genera and 2,000–2,200 species, distributed mainly in tropical and subtropical regions worldwide. Historically treated as part of Euphorbiaceae, molecular phylogenetic studies demonstrated that these taxa represent a distinct evolutionary lineage, leading to the recognition of Phyllanthaceae as an independent family. Members are characterized by simple alternate leaves, small unisexual flowers, superior ovaries, and capsular or fleshy fruits.
Key characteristics
- Herbs, shrubs, or trees
- Leaves alternate, simple, usually distichous
- Phyllanthoid branching common
- Flowers small and unisexual
- Plants monoecious or dioecious
- Superior ovary
- Fruit a capsule, berry, or drupe
- Latex absent (unlike many Euphorbiaceae)
Distribution
Phyllanthaceae has a pantropical distribution, extending into warm temperate regions. The greatest diversity occurs in Southeast Asia, tropical Africa, South America, and Australia. Members inhabit tropical rainforests, dry forests, savannas, scrublands, riverbanks, agricultural fields, and disturbed habitats. In Pakistan, Phyllanthaceae occurs throughout, and the lower Himalayan foothills. Species are commonly found in cultivated fields, roadsides, gardens, wastelands, riverbanks, scrub vegetation, and moist disturbed habitats. The medicinal herb Phyllanthus amarus and the tree Phyllanthus emblica (Indian gooseberry, Amla) are among the best-known representatives.