Commelinaceae
Commelinaceae Mirb. is an accepted family in the order Commelinales 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 40–42 genera and 700–750 species, distributed mainly in tropical and subtropical regions of the world. Molecular phylogenetic studies have confirmed the monophyly of the family and clarified relationships among major genera, particularly Commelina, Tradescantia, Murdannia, and Aneilema. Members are characterized by succulent herbaceous stems, closed leaf sheaths, ephemeral flowers, and capsular fruits.
Key characteristics
- Annual or perennial succulent herbs
- Stems often creeping and rooting at the nodes
- Leaves alternate with closed sheathing bases
- Parallel venation
- Flowers with three sepals and three petals
- Stamens six, often with staminodes
- Superior ovary
- Fruit a loculicidal capsule
Distribution
Commelinaceae is distributed throughout the tropical and subtropical regions of Africa, Asia, Australia, and the Americas, with a few species extending into warm temperate areas. Members commonly occur in forests, wetlands, grasslands, riverbanks, agricultural fields, forest margins, and disturbed habitats. Many species thrive in moist, shaded environments, while others are adapted to seasonally dry habitats. Commelinaceae occurs throughout Pakistan, particularly in the Upper and Plains, Lower Indus Plain, Himalayan foothills, Potohar Plateau, riverine forests, wetlands, and moist valleys of. Several species are common weeds in cultivated fields, gardens, orchards, irrigation channels, and roadsides, while ornamental taxa are widely cultivated in urban landscapes and botanical gardens.