Estrella Mountain Community College
Online Biology Book: Biodiversity: Nonvascular & Nonseed Vascular Plants
Photographs, informative tables, and illustrated diagrams help explain the diversity of the plant kingdom in this college-level textbook.
Biology 4 kids
Biology4 Kids: Ferns and Horsetails First Plants With Pipes
Brief informational text highlighting the first vascular plants on earth, the ferns and horsetails.
CK-12 Foundation
Ck 12: Life Science: 7.6 Vascular Plants
Learn the structure and function of vascular plants.