தாவரம்: திருத்தங்களுக்கு இடையிலான வேறுபாடு

| align="right" | 3,800 <ref>Van den Hoek, C., D. G. Mann, & H. M. Jahns, 1995. ''Algae: An Introduction to Phycology''. pages 343, 350, 392, 413, 425, 439, & 448 (Cambridge: Cambridge University Press). {{ISBN |0-521-30419-9}}</ref>

| align="right" | 4,000 - 6,000 <ref>Van den Hoek, C., D. G. Mann, & H. M. Jahns, 1995. ''Algae: An Introduction to Phycology''. pages 457, 463, & 476. (Cambridge: Cambridge University Press). {{ISBN |0-521-30419-9}}</ref>

| align="right" | 6,000 - 8,000 <ref>Crandall-Stotler, Barbara. & Stotler, Raymond E., 2000. "Morphology and classification of the Marchantiophyta". page 21 ''in'' A. Jonathan Shaw & Bernard Goffinet (Eds.), ''Bryophyte Biology''. (Cambridge: Cambridge University Press). {{ISBN |0-521-66097-1}}</ref>

| align="right" | 100 - 200 <ref>Schuster, Rudolf M., ''The Hepaticae and Anthocerotae of North America'', volume VI, pages 712-713. (Chicago: Field Museum of Natural History, 1992). {{ISBN |0-914868-21-7}}.</ref>

| align="right" | 1,200 <ref name="Raven 2005">Raven, Peter H., Ray F. Evert, & Susan E. Eichhorn, 2005. ''Biology of Plants'', 7th edition. (New York: W. H. Freeman and Company). {{ISBN |0-7167-1007-2}}.</ref>

| align="right" | 160 <ref>Gifford, Ernest M. & Adriance S. Foster, 1988. ''Morphology and Evolution of Vascular Plants'', 3rd edition, page 358. (New York: W. H. Freeman and Company). {{ISBN |0-7167-1946-0}}.</ref>

| align="right" | 1 <ref>Taylor, Thomas N. & Edith L. Taylor, 1993. ''The Biology and Evolution of Fossil Plants'', page 636. (New Jersey: Prentice-Hall). {{ISBN |0-13-651589-4}}.</ref>