Pteridophytes

Megaspores

are produced by meiosis and develop into a gametophyte that produces egg cells

Indusium

umbrella-like covering of sporangium/sorus

Cohesion

the tendency of water molecules to adhere to one another

Xylem

the vascular tissue that transports water

Adhesion

the tendency of water molecules to adhere to a given substrate

Evapotranspiration

the process by which plants procure water from the environment

Phloem

the vascular tissue that transports sugars

Stomata

the openings in the epidermis of leaves that allow for gas exchange

Euphyllophytes and Lycophytes

the two groups of tracheophytes

Sporangia

a structure where spores are produced

Strobilus

an aggregate of sporangia

Megaphyll

a leaf with multiple veins

Sorus

a cluster of sporangia found on the underside of leaves

Microphyll

a leaf with a single vein

Megasporophyll

a leaf that subtends a female sporangium (megasporangium)

Microsporophyll

a leaf that subtends a male sporangium (microsporangium)

Megagametophyte

female gametophyte

Microgametophyte

male gametophyte

Microspores

are a structure that develops into a gametophyte that produces sperm cells

Pteridophyta

the phylum of seedless vascular plants with the most species

Equisetales

the phylum of seedless vascular plants with the least amount of species