protoxylem

As nouns the difference between protoxylem and protophloem

is that protoxylem is the first xylem to form in a plant while protophloem is the form of phloem that is initially formed, composed of narrow, thin-walled cells.

As nouns the difference between taxonomy and protoxylem

is that taxonomy is the science or the technique used to make a classification while protoxylem is the first xylem to form in a plant.

Melaxylem is likely misspelled.

Melaxylem has no English definition.

As a noun protoxylem

is the first xylem to form in a plant.

As nouns the difference between plant and protoxylem

is that plant is an organism that is not an animal, especially an organism capable of photosynthesis typically a small or herbaceous organism of this kind, rather than a tree while protoxylem is the first xylem to form in a plant.

As a verb plant

is to place (a seed or plant) in soil or other substrate in order that it may live and grow.