Introduction – link

Bryophytes include three lineages:

• Phylum Bryophyta – Mosses
  (approximately 12,800 species worldwide, 720 species in B.C.)
• Phylum Marchantiophyta – Liverworts
  (approximately 6,000 species worldwide, 435 species in B.C.)
• Phylum Anthocerotophyta – Hornworts
  (approximately 150 species worldwide, 3 species in B.C.)