April 9, 2021
Plant Talk 3 Pages 4 – 13 in Botany in a Day (5th ed) Pages 5 – 14 in Botany in a Day (6th ed)
Greetings plant enthusiasts!
Things, i have noticed blooming recently include Barrenwort (Epimedium spp.), Bear Corn (Conopholis americana), Bridal Veil Spiraea (Spiraea prunifolia var “Plena”), Celadine Poppy (Stylophorum diphyllum), Cowslip (Primula veris), Deutzia gracilis var. “Nikko”, Dwarf Crested Iris (Iris cristata), Fleabane (Erigeron spp.), Honesty (Lunaria spp.), Garlic Mustard (Alliaria petiolata), Lily of the Valley (Convallaria sp.), Little Brown Jugs (Hexastylis spp.), Mazus reptans, Periwinkle (Vinca sp.), Mexican Anise tree (Illicium mexicanum), Pinkshell Azalea (Rhododendron vaseyi), Sassafras albidum, Trailing arbutus (Epigaea repens), Trillium spp., Trout Lily (Erythronium sp.), Tulipa spp.,Virginia Bluebells (Mertensia virginica), Wild Ginger (Asarum canadense), and Wisteria sp.
How about you? How many of these plants above do you recognize? How many do you know the family of? Take some time to look one up in Botany in a Day and learn something new this way!
What’s ready to eat
Brassicaceae members Garlic Mustard and Honesty from the list above are invasive and edible. Native favorite foods Ramps (Allium tricoccum) are up and Morels (Morchella spp.) are out. Ramps in particular often lead me to think about ethical foraging. i just came across a great article that addresses this concern. It is important to realize both Ramps and Morels have potentially poisonous lookalikes.
The greens abound currently! Other great foods from the Brassicaceae are available including Armoracia, Barbarea verna, Cardamine spp., and Lepidium spp. Chickweeds (Stellaria spp. and Cerastium spp.) are still around but on their way out. Violets (Viola spp.) are in full effect and i continue to eat Wild Onions (Allium vineale) often! A favorite cooked green of the Cherokee, Sochane (Rudbeckia laciniata) is starting to emerge. Hostas are also emerging which are considered edible according to a number of sources. They are eaten traditionally regarding some wild species in Japan (Calavan, 1972; Carter, 2012; Fern, 2008; Hollis, 2011; Hosking & Samuels, 2015; Kelley, 2014). What’s your take, knowledge, experience with eating Hostas? Important to realize that when emerging they greatly resemble the potentially deadly but mostly found in the wild False Hellebore (Veratrum spp).
Botany in a Day Pages 4-13
The evolution of plants covered in the next few pages can verge from fascinating to overwhelming. Can anybody really conceive of what 300 million years looks like? Yet we are burning in 300 years petrochemical products that were generated millions of years ago by the deposition of ancient huge Horsetails (Equisetum spp.), Ferns, and Wolfpaws (Lycopodium spp.). 300 million and 300 share the same denomination yet the order of magnitude difference is almost beyond human comprehension.
One potentially important lesson is that some plant groups have significantly more history, tenacity and adaptive ability on this earth than others. We are in the midst of the 6th great extinction that has been witnessed by the earth. Some people term it the Anthropocene because of the vast influences of humans on the earth’s biochemical systems. Elizabeth Kolbert (2014) has written a fascinating book regarding this concept. The vast majority of everything that has ever lived has already perished. The last great extinction happened 65 million years ago when a giant asteroid hit the Yucatan peninsula. We have a lot to learn from some of the ancient beings that have survived so much.
After the botany overview in the text most people tend to skip over the single celled plants, lichens, ancient non-vascular spore plants (Mosses, Hornworts and Liverworts) and vascular spore plants (Horsetails, Club Mosses and Ferns).
Some sources especially ones regarding ethnobotany treat the ferns and their allies along with lichens all together (Abbe, 1985; May, 1978; Mickel, 1979; Phillips, Grant, & Rix, 1980; Rogers, 2014; Vitt, Marsh, Bovey, & more, 2007).
Lichens have their own special literature as well (Bolton, 1972; Brodo, Sharnoff, & Sharnoff, 2001; K. D. Casselman, 1994, 2001; K. L. Casselman, 2001; Gordon, 1980; Kappelle & Sipman, 1992; Lindsay, 1855; Lücking, Chaves, Sipman, Umaña, & Aptroot, 2008; McClure, 1992, 1992; McCune, 2009, 2009; McGrath, 1977; Nunez-Zapata, 2015; Pope, 2005; Purvis, 2000; Sérusiaux, 1996; Umaña & Sipman, 2002; Walewski, 2007).
i am less familiar with the moss, liverwort, hornwort literature (Churchill, Griffin, & Muñoz, 2000; Kimmerer, 2003; Martin, 2015; McKnight, Rohrer, Ward, Perdrizet, & more, 2013; Munch, 2006; Oshima & Kimura, 2017; Pope, 2016; Schenk, 1997; Söderström, Hagborg, von Konrat, & Renner, 2008; Welch & Crum, 1959).
Paleobotany is a fascinating science that looks into the lineage of these plants and the evolution of others (Armstrong, 2015; Cleal & Thomas, 2009; Graham, 1996; Niklas, 2016; Stevens, Montiel, & Raven, 2014; Stewart & Rothwell, 2010; Stinchcomb, 2013; Taylor, Taylor, & Krings, 2009; Willis & McElwain, 2014; Xiang, Soltis, Soltis, Manchester, & Crawford, 2000).
Ferns tend to intimidate folks for some reason. Relatively few ferns live in any given area of the temperate world. Only 36 genera live in North America total (Cook, 2007). Some species such as Bracken fern (Pteridium aquilinum) live all over the world. A couple small pocket references can unlock most of the ferns of the east (Evans, 2005; Hallowell, 2001). A couple other references will allow a more complete conception of Fern diversity in general (Cobb, Farnsworth, & Lowe, 2005; Olsen & Steffen, 2015; Vitt et al., 2007; Walewski, 2016; Wherry, 1995). i have found quite a few good resources for Costa Rican/Panamanian and by extension Central American ferns as well in my research (Barrington, 1993, 2012; Grayum & Churchill, 1987; Kluge, 2006; Lellinger, 1977, 1989a, 1989b, 2003; Rojas, 1999).
i have collected a few for Jamaica in particular and the Caribbean more broadly as well (Kelly, 1985; Newton & Healey, 1989; Proctor, 1953, 1961, 1984).
Florida also has a number of guides to the ferns (Long & Lakela, 1971; Nelson, 2000; Small, 1931) as does Hawaii (Bohm, 2009; Palmer, 2008; Valier, 1995).
Fern taxonomy like several other botanical categories has undergone quite a reformation in recent years (Kato, 1993; Lellinger, 2002; Schuettpelz & Pryer, 2007; A. R. Smith et al., 2006).
Due to their aesthetic beauty and growth in the shade ferns are a popular subject for cultivation (Dunk, 1983, 1994; Hoshizaki, 1975; Hoshizaki & Moran, 2001; Mickel, 2003; Olsen, 2007; Olsen & Steffen, 2015).
Only a few ferns in general are proven safe for consumption and traditionally eaten and even some of those are in question. Ostrich ferns (Matteuccia struthiopteris) which only naturally grow in the Northeast, Midwest and Canada/Alaska regarding North America, seem to be the most prime. Bracken fern mentioned above has been eaten all over the world but has been known for decades to potentially cause cancer (Fenwick, 1989; Pamukcu, Yalçiner, Hatcher, & Bryan, 1980; B. L. Smith et al., 1994). This effect may even extend to the consumption of milk from cows that have grazed on Brackens. However, there is some question if part of this effect is immunosuppression versus the pure carcinogenic nature or various compounds (Latorre et al., 2009). Ferns also have an enzyme called thiaminase that breaks down vitamin B12 and therefore should always be cooked in order to deactivate this anti-nutrient. Many ferns are rare and after quite a bit of research i can find little information attesting to safety of other species one way or another. Therefore random crozier/fiddlehead harvesting is discouraged!
According to a conversation i had with Frank Cook, he took note of much fern eating by people in New Zealand in particular. Fern eating is popular in Japan as well. i have found a little information on the ethnobotany of ferns including in New Zealand, the Andes and Japan (Abbe, 1985; Franquemont, 2012; Lellinger, 2002; May, 1978; Rogers, 2014; Shawcross, 1967; Tryon, 1959).
Conifers represent a very accessible group to approach. Only around 630 total species have been described in the whole world (Groombridge & Jenkins, 2002, p. 236). However, breeders have developed many varieties with dramatic results in increased diversity. Most bioregions in the temperate world have less than ten species of native conifers. Landscape varieties are often easy to identify to genus, though to species can be difficult. A number of great references exist to help with teasing apart the many conifer types (Eckenwalder, 2009; Farjon, 2008, 2010). Conifers are much older than flowering plants. Their range has also been much diminished from a former wider distribution. They tend to live in harsher conditions than the flowering trees as well. Only a few families represent the majority of conifer diversity including the Cupressaceae, Pinaceae, Podocarpaceae, Taxaceae, and interestingly the monotypic Gingkoaceae. The first two have the lion’s share of the species. A few other more southern and Asian families also fall in the conifer group including the Araucariaceae, Cephalotaxaceae, Cycadaceae, Ephedraceae, Sciadopityaceae and the Zamiaceae.
The flowering plants are relatively young compared to the other plant groups. Yet as can be seen on page 13/14 of Botany in a Day they contain the vast majority of species now growing on the planet (Elpel, 2004/2013). Therefore, they will be the main focus of our studies this year. We will revisit the conifers more in depth during the class about woody plants as well.
Elpel points out a couple other very useful resources for this exploration of the plant world Wildflowers of North America by Frank Venning (1984) and Plant Identification Terminology by James G. Harris (2001). Consider purchasing these books as well if you are able. Learning terminology is an incremental process. Flash cards help some. A number of good online resources exist with card sets already made and the ability to generate others. Quizlet is a favorite i have explored so far and mentioned last class as well http://quizlet.com/subject/botany/. Ultimately, some form of repetition will be necessary to cement certain words into your vocabulary. One bonus is that by learning many of these words you may better understand the roots of romance languages. You can thereby learn Catalan, French, Italian, Portuguese and Spanish easier and may do better on the GRE as well if that is of interest. See the resources section for a list of other electronic resources that may be available for further study.
On page 12/13 one can see a way to conceptualize how plants fit into the greater classification of other biological organisms. The use of domains has overtaken kingdoms as the ultimate level of classification. The main point of this for me is how humbling it is to be a small part of one domain while seeing that organisms we commonly lump together as microbes have two whole domains to themselves.
For the next class we will cover the pages 14-24(5th ed) 15-22(6th ed.) which describe the two major classes of flowering plants and patterns of seven major plant families of the world. It will be posted around 4/24
Below are items to think about/comment on. Please write me directly at firstname.lastname@example.org or leave information in the commentary under this class.
Take a notebook with you and record what distinguishes the blooming plants you see from each other.
Take the quiz on page 24 (5th ed.) This is omitted in the 6th ed.
Check out one of the websites i mentioned in the introduction to this class and pick up an interesting fact or two. Share them with us!
Most people in the world get the vast majority of their food from around 30 plants. An indigenous culture may easily make use of over 150 species of plants for food throughout the year. How many different plants do you consume annually?
Please let me know your thoughts in general and anyway i can help this class serve you best.
Praises to all that have donated to the cause. i encourage everyone to donate as they are able. Your contributions greatly help me continue this crucial work of ethnobotanical research and education.
Abbe, E. M. (1985). The Fern Herbal: Including the Ferns, the Horsetails, and the Club Mosses. Ithaca: Cornell Univ Press.
Armstrong, J. E. (2015). How the Earth Turned Green: A Brief 3.8-Billion-Year History of Plants. Chicago ; London: University Of Chicago Press.
Barrington, D. S. (1993). Ecological and Historical Factors in Fern Biogeography. Journal of Biogeography, 20(3), 275–279. https://doi.org/10.2307/2845635
Barrington, D. S. (2012). The Fern Genus Polystichum (Dryopteridaceae) in Costa Rica 1. Mobt Annals of the Missouri Botanical Garden, 98(4), 431–446.
Bohm, B. A. (2009). Hawaii’s Native Plants (2nd ed.). Honolulu: Mutual Pub Co.
Bolton, E. M. (1972). Lichens for vegetable dyeing. London; McMinnville, OR: Studio Vista Publishers ; Robin & Russ Handweavers.
Brodo, I. M., Sharnoff, M. S. D., & Sharnoff, S. (2001). Lichens of North America (First Printing edition). New Haven: Yale University Press.
Calavan, M. M. (1972). Cultural, environmental, and socioeconomic factors in food use: the Sansai case. New York: Southeast Asia Development Advisory Group of the Asia Society.
Carter, A. (2012, May 7). Eating hostas. Retrieved April 10, 2016, from Of Plums and Pignuts website: https://scottishforestgarden.wordpress.com/2012/05/07/hostas/
Casselman, K. D. (1994). Historical and Modern Lichen Dyes: Some Ethical Considerations. Halifax: Nova Scotia Museum of Natural History.
Casselman, K. D. (2001). Lichen Dyes and Dyeing a Critical Bibliography of the European and North American Literature in a Culturally Marginalized Field. Ottawa: Library and Archives Canada.
Casselman, K. L. (2001). Lichen Dyes: The New Source Book. Mineola, NY: Dover.
Churchill, S. P., Griffin, D., & Muñoz, J. (2000). A Checklist of the Mosses of the Tropical Andean Countries. Editorial CSIC - CSIC Press.
Cleal, C. J., & Thomas, B. A. (2009). An Introduction to Plant Fossils (1 edition). Cambridge, UK ; New York: Cambridge University Press.
Cobb, B., Farnsworth, E., & Lowe, C. (2005). A Field Guide to Ferns and Their Related Families: Northeastern and Central North America (2nd ed.). Boston: Houghton Mifflin Co.
Dunk, G. (1983). Ferns for the Home and Garden. North Ryde, NSW: HarperCollins Publishers Ltd.
Dunk, G. (1994). Ferns: A Comprehensive Guide to Growing Ferns for the Home Gardener. Sydney, N.S.W., Australia; Auckland, N.Z.: Harpercollins.
Eckenwalder, J. E. (2009). Conifers of the world: the complete reference. Portland: Timber Press.
Evans, A. M. (2005). Ferns & Fern Allies of the Smokies. Gatlinburg, Tenn: Great Smoky Mountains Association.
Farjon, A. (2008). A natural history of conifers. Portland, Or.: Timber Press.
Farjon, A. (2010). A handbook of the world’s conifers. Leiden; Boston: Brill.
Fenwick, G. R. (1989). Bracken (Pteridium aquilinum)—toxic effects and toxic constituents. Journal of the Science of Food and Agriculture, 46(2), 147–173. https://doi.org/10.1002/jsfa.2740460204
Fern, K. (2008). Plants for a future - 7300 useful plants database. Retrieved April 23, 2009, from Plants For a Future website: http://www.pfaf.org/index.php
Franquemont, C. (2012). The Ethnobotany of Chinchero, an Andean Community in Southern Peru. Forgotten Books.
Gordon, F. A. (1980). Dyeing with Sticta Coronata, New Zealand’s King of the Dye Lichens (First edition). Naturally.
Graham, A. (1996). Paleobotany of Puerto Rico: From Arthur Hollick’s (1928) Scientific Survey Paper to the Presentation to the New York Academy of Sciences. NYAS Annals of the New York Academy of Sciences, 776(1), 103–114.
Grayum, M. H., & Churchill, H. W. (1987). An Introduction to the Pteridophyte Flora of Finca La Selva, Costa Rica. American Fern Journal, 77(3), 73–89. https://doi.org/10.2307/1547496
Hallowell, A. C. (2001). Fern Finder: A Guide to Native Ferns of Central and Northeastern United States and Eastern Canada (2nd ed.). Rochester, NY: Nature Study Guild Publihers.
Hollis, J. (2011, April). Mountain Gardens / Home. Retrieved October 15, 2011, from http://www.mountaingardensherbs.com/
Hoshizaki, B. J. (1975). Fern growers manual. New York: Knopf.
Hoshizaki, B. J., & Moran, R. C. (2001). Fern Grower’s Manual: Revised and Expanded Edition (2nd ed.). Portland, OR: Timber Press, Incorporated.
Hosking, R., & Samuels, D. (2015). A Dictionary of Japanese Food: Ingredients and Culture. Tokoyo; Rutland, VT: Tuttle Publishing.
Kappelle, M., & Sipman, H. J. M. (1992). Foliose and fruticose lichens of Talamanca Montane Quercus forests, Costa Rica.
Kato, M. (1993). Biogeography of Ferns: Dispersal and Vicariance. Journal of Biogeography, 20(3), 265–274.
Kelley, P. (2014, June 24). Raw Edible Plants: Hosta species. Retrieved April 10, 2016, from Raw Edible Plants website: http://rawedibleplants.blogspot.com/2014/06/hosta-species.html
Kelly, D. L. (1985). Epiphytes and Climbers of a Jamaican Rain Forest: Vertical Distribution, Life Forms and Life Histories. Journal of Biogeography, 12(3), 223–241. https://doi.org/10.2307/2844997
Kimmerer, R. W. (2003). Gathering Moss: A Natural and Cultural History of Mosses. Corvallis, OR: Oregon State University Press.
Kluge, J. (2006). Fern endemism and its correlates: contribution from an elevational transect in Costa Rica. Diversity and Distributions, 12(5), 535–545.
Latorre, A. O., Furlan, M. S., Sakai, M., Fukumasu, H., Hueza, I. M., Haraguchi, M., & Górniak, S. L. (2009). Immunomodulatory effects of Pteridium aquilinum on natural killer cell activity and select aspects of the cellular immune response of mice. Journal of Immunotoxicology, 6(2), 104–114. https://doi.org/10.1080/15476910902972465
Lellinger, D. B. (1977). Nomenclatural Notes on Some Ferns of Costa Rica, Panama, and Colombia. American Fern Journal, 67(2), 58–60. https://doi.org/10.2307/1545968
Lellinger, D. B. (1989a). The Ferns and Fern-Allies of Costa Rica, Panama, and the Chocó: Psilotaceae through Dicksoniaceae. Washington, D.C.: American Fern Society.
Lellinger, D. B. (1989b). The Ferns and Fern-Allies of Costa Rica, Panama, and the Choco: Psilotaceae through Dicksoniaceae. Washington, D.C: American Fern Society.
Lellinger, D. B. (2002). A Modern Multilingual Glossary for Taxonomic Pteridology. Washington, D.C.: American Fern Society.
Lellinger, D. B. (2003). Nomenclatural and Taxonomic Notes on the Pteridophytes of Costa Rica, Panama, and Colombia, III. American Fern Journal, 93(3), 146–151.
Lindsay, W. L. (1855). Experiments on the dyeing properties of lichens. Printed by Neill and Co.
Long, R. W., & Lakela, O. (1971). A Flora of Tropical Florida: A Manual of the Seed Plants and Ferns of Southern Peninsular Florida. Coral Gables, FL: University of Miami Press.
Lücking, R., Chaves, J. L., Sipman, H. J. M., Umaña, L., & Aptroot, A. (2008). A First Assessment of the Ticolichen Biodiversity Inventory in Costa Rica: The Genus Graphis , with Notes on the Genus Hemithecium (Ascomycota: Ostropales: Graphidaceae). Fbot Fieldiana Botany, 1–126.
Martin, A. (2015). The Magical World of Moss Gardening. Timber Press.
May, L. (1978). The Economic Uses and Associated Folklore of Ferns and Fern Allies. The Botanical Review, 44(4), 491–528. https://doi.org/10.1007/BF02860848
McClure, S. E. (1992). A natural dyer’s guide to Rocky Mountain lichens. Aspen Angora Publications.
McCune, B. (2009). Macrolichens of the Pacific Northwest (2nd ed.). Corvallis: Oregon State University Press.
McGrath, J. W. (1977). Dyes from lichens & plants. Toronto; New York: Van Nostrand Reinhold.
McKnight, K. B., Rohrer, J. R., Ward, K. M., Perdrizet, W. J., & more, & 1. (2013). Common Mosses of the Northeast and Appalachians. Princeton: Princeton University Press.
Mickel, J. T. (1979). How to Know the Ferns and Fern Allies (J. Bamrick, E. T. Cawley, & W. G. Jaques, Eds.). Dubuque, Iowa: Wm. C. Brown.
Mickel, J. T. (2003). Ferns for American Gardens. Portland, Or: Timber Press, Incorporated.
Munch, S. (2006). Outstanding Mosses & Liverworts of Pennsylvania & Nearby States (1st edition). New Kingston, PA: Sunbury Press, Inc.
Nelson, G. (2000). The ferns of Florida: a reference and field guide. Sarasota, FL: Pineapple Press.
Newton, A. C., & Healey, J. R. (1989). Establishment of Clethra occidentalis on Stems of the Tree-Fern Cyathea pubescens in a Jamaican Montane Rain Forest. Journal of Tropical Ecology, 5(4), 441–445.
Niklas, K. J. (2016). Plant Evolution: An Introduction to the History of Life. Chicago ; London: University Of Chicago Press.
Nunez-Zapata, J. (2015). New lichen biota records from Santuario Histórico de Machu Picchu, Peru. Revista Peruana de Biología, 22(3), 323–328.
Olsen, S. (2007). Encyclopedia of Garden Ferns. Portland, OR: Timber Press, Incorporated.
Olsen, S., & Steffen, R. (2015). The Plant Lover’s Guide to Ferns. Portland, OR: Timber Press.
Oshima, M., & Kimura, H. (2017). Miniature Moss Gardens: Create Your Own Japanese Container Gardens (Bilingual ed. edition). Tuttle Publishing.
Palmer, D. D. (2008). Hawai’i’s Ferns and Fern Allies. Univ of Hawaii Press.
Pamukcu, A. M., Yalçiner, Ş., Hatcher, J. F., & Bryan, G. T. (1980). Quercetin, a Rat Intestinal and Bladder Carcinogen Present in Bracken Fern (Pteridium aquilinum). Cancer Research, 40(10), 3468–3472.
Phillips, R., Grant, S., & Rix, M. (1980). Grasses, ferns, mosses & lichens of Great Britain and Ireland. London: Pan Books.
Pope, R. (2005). Lichens above Treeline: A Hiker’s Guide to Alpine Zone Lichens of the Northeastern United States. Hanover: UPNE.
Pope, R. (2016). Mosses, Liverworts, and Hornworts: A Field Guide to Common Bryophytes of the Northeast (1 edition). Ithaca: Comstock Publishing Associates.
Proctor, G. R. (1953). A preliminary checklist of Jamaican pteridophytes. Institute of Jamaica.
Proctor, G. R. (1961). Notes on Lesser Antillean Ferns. Rhodora, 63(746), 31–35.
Proctor, G. R. (1984). Ferns of Jamaica: Guide to the Pteridophytes. London: Natural History Museum Publications.
Purvis, W. (2000). Lichens. Washington, D.C: Smithsonian Books.
Rogers, R. D. (2014). Ancient medicinal remedies: horsetails, ferns, lichens and more.
Rojas, A. (1999). Helechos arborescentes de Costa Rica = Costa Rica arborescent ferns. Santo Domingo, Heredia, Costa Rica: Instituto Nacional de Biodiversidad.
Schenk, G. (1997). Moss Gardening: Including Lichens, Liverworts, and Other Miniatures. Portland, OR: Timber Press.
Schuettpelz, E., & Pryer, K. M. (2007). Fern phylogeny inferred from 400 leptosporangiate species and three plastid genes. Taxon, 56(4), 21.
Sérusiaux, E. (1996). Foliicolous Lichens From Madeira, with the Description of a New Genus and two New species and a World-Wide key of Foliicolous Lichens. The Lichenologist, 28(3), 197–227. https://doi.org/10.1006/lich.1996.0019
Shawcross, K. (1967). Fern-Root, and the Total Scheme of the 18th Century Maori Food Production in Agricultural Areas. The Journal of the Polynesian Society, 76(3), 330–352.
Small, J. K. (1931). Ferns of Florida; being descriptions of and notes on the fern-plants growing naturally in Florida. New York: Science Press.
Smith, A. R., Pryer, K. M., Schuettpelz, E., Korall, P., Schneider, H., & Wolf, P. G. (2006). A Classification for Extant Ferns. Taxon, 55(3), 705. https://doi.org/10.2307/25065646
Smith, B. L., Seawright, A. A., Ng, J. C., Hertle, A. T., Thomson, J. A., & Bostock, P. D. (1994). Concentration of ptaquiloside, a major carcinogen in bracken fern (Pteridium spp.), from eastern australia and from a cultivated worldwide collection held in Sydney, Australia. Natural Toxins, 2(6), 347–353. https://doi.org/10.1002/nt.2620020602
Söderström, L., Hagborg, A., von Konrat, M., & Renner, M. (2008). Chapter Ten: Early Land Plants Today: Liverwort Checklist of Checklists. FIELDIANA: BOTANY Fieldiana Botany, 105–130.
Stevens, W. D., Montiel, O. M., & Raven, P. (Eds.). (2014). Paleobotany and Biogeography. St. Louis: Missouri Botanical Garden Press.
Stewart, W. N., & Rothwell, G. W. (2010). Paleobotany and the Evolution of Plants (2nd ed.). Cambridge University Press.
Stinchcomb, B. L. (2013). Paleozoic Fossil Plants. Atglen, PA: Schiffer Publishing, Ltd.
Taylor, T. N., Taylor, E. L., & Krings, M. (2009). Paleobotany: the biology and evolution of fossil plants. Amsterdam; Boston: Academic Press.
Tryon, A. F. (1959). Ferns of the Incas. American Fern Journal, 49(1), 10–24. https://doi.org/10.2307/1545106
Umaña, L., & Sipman, H. (2002). Líquenes de Costa Rica / Costa Rica Lichens. Editorial INBio.
Valier, K. (1995). Ferns of Hawai’i. Honolulu: University of Hawaii Press.
Vitt, D. H., Marsh, J. E., Bovey, R. B., & more, & 0. (2007). Mosses Lichens & Ferns of Northwest North America (Reprint). Edmonton, Alberta.; Seattle, WA: Lone Pine Publishing.
Walewski, J. (2007). Lichens of the North Woods: A Field Guide to 111 Lichens. Duluth, MN; Cambridge, MN: Kollath-Stensaas Publishing.
Walewski, J. (2016). Ferns & Allies of the North Woods: A Handy Field Reference to All 86 of Our Ferns and Allies. Kollath-Stensaas Publishing.
Welch, W. H., & Crum, H. (1959). A Contribution to the Jamaican Moss Flora. The Bryologist, 62(3), 165–179. https://doi.org/10.2307/3240178
Wherry, E. T. (1995). The Fern Guide: Northeastern and Midland United States and Adjacent Canada. New York: Dover Publications.
Willis, K., & McElwain, J. (2014). The Evolution of Plants (2nd ed.). Oxford, United Kingdom ; New York: Oxford University Press.
Xiang, Q.-Y., Soltis, D. E., Soltis, P. S., Manchester, S. R., & Crawford, D. J. (2000). Timing the Eastern Asian-Eastern North American Floristic Disjunction: Molecular Clock Corroborates Paleontological Estimates. Molecular Phylogenetics and Evolution, 15(3), 462–472. https://doi.org/10.1006/mpev.2000.0766