Whisk ferns

Definition

Whisk ferns are a type of seedless vascular plant characterized by their simple structure, lacking true leaves and roots. They reproduce via spores and have branched stems that perform photosynthesis.

5 Must Know Facts For Your Next Test

1. Whisk ferns belong to the genus Psilotum within the division Pteridophyta.
2. They have a unique morphology with no true leaves or roots, instead having rhizomes and enations.
3. The stems of whisk ferns contain vascular tissue, specifically xylem and phloem.
4. Reproduction occurs through homosporous spores produced in synangia located on the branches.
5. Whisk ferns are considered living fossils, showing primitive traits similar to early land plants.

Review Questions

• What type of reproductive structures do whisk ferns use?
• How do whisk ferns differ from other seedless vascular plants in terms of morphology?
• In which division are whisk ferns classified?

Related terms

Bryophytes: Non-vascular plants including mosses, liverworts, and hornworts that reproduce through spores.

Ferns: Seedless vascular plants with fronds and underground rhizomes that also reproduce via spores.

Lycophytes: A group of seedless vascular plants that includes club mosses, characterized by microphylls (small leaves).