A naturally occurring subgroup within a species with distinct characteristics.

A strand of xylem and phloem tissues that conduct water, nutrients, and food in plants.

A structural unit in plant stems and leaves containing conducting tissues.

Plants that have specialized conducting tissues—xylem and phloem—for transporting water, nutrients, and food.

Relating to plant tissues that conduct fluids, such as xylem and phloem.

Pertaining to the network of vessels in plants responsible for transport.

Having one row or layer of cells or organs.

Arranged or occurring in a single line or layer.

Having either stamens or carpels, but not both; male or female.

Not hermaphroditic; with reproductive structures of one sex only.