Plant
- Species and cultivars vary
- Annual
Stem
- Sprawling, vine-like with alternate leaves or bush types with leaves crowded near base
Leaf
- Broadly triangular to nearly circular to heart-shaped
- Shallow-toothed edges, sometimes lobed
Flower
- Separate male and female flowers on same plant
- Yellow
- Female has what appears to be small fruit below petals
Fruit
- Size, shape, color vary by cultivar
- Two general types: winter (left), summer (right)
- Winter-harvested when rind and seeds mature
- Summer-harvested while immature with soft skin and seeds