Four Plant Divisions

Thallophyta are a primary taxonomic division of organisms which are plant-like, but not true plants, including all one-celled and cell aggregates which do not clearly show roots, stem, and leaf; including algae, fungi, and lichens.

Bryophytes are all embryophytes that are non-vascular. They have tissues and enclosed reproductive systems, but they lack vascular tissue that circulates liquids. They neither have flowers noir produce seeds, reproducing via spores; including mosses, liverworts, and hornworts.

Pteridophytesare vascular plants that neither flower nor produce seeds, hence they are called vascular cryptogams. Instead, they reproduce and disperse only via spores; including lycophytes, horsetails, and ferns.

Spermatophytes comprise these plants that produce seeds. They are a subset of the embryophytes; including conifers.