Field Guide

Mosses, Liverworts, and Lichens

Showing 1 - 10 of 18 results
Common powderhorn lichen (Cladonia coniocraea) at Painted Rock CA
Common Powderhorn
Cladonia coniocraea
Common powderhorn’s slender, gray-green, hornlike fruiting structures emerge from a carpet of gray-green, scalelike squamules. This lichen usually grows on old, damp wood, often on tree bases, in shady areas.
Carolina phaeoceros hornwort, Phaeoceros carolinianus
Hornworts
4 species in Missouri
With their flattened, green forms, hornworts resemble liverworts, but their spore-bearing structures are elongated and horn-shaped. As with liverworts and mosses, hornworts make forest floors, streamsides, and spring openings beautiful.
Closeup of thallus lobe of snakeskin liverwort
Liverworts
About 112 species in Missouri
Liverworts, along with mosses, make forest floors, streamsides, and spring openings beautiful. They’re fascinating but overlooked.
Snakeskin liverwort growing on a rock
Snakeskin Liverwort
Conocephalum salebrosum (formerly C. conicum)
Snakeskin liverwort looks like large, flattened, irregular, overlapping straps. The surface is covered with polygon-shaped air pores, giving it a bubbly appearance similar to snakeskin. Look for it along streams, springs, and the moist bases of bluffs.
Colony of umbrella liverwort with maturing archegonia
Umbrella Liverwort
Marchantia polymorpha
Umbrella liverwort is the most famous liverwort in the world. It grows in green ribbons and is very common on the soil of potted plants. It typically forms cuplike gemmae on its upper surface. Its palm-tree-shaped archegona are distinctive, too.
Wall scalewort, Porella species, growing on sandstone at Painted Rock CA
Porella Liverworts (Wall Scaleworts)
Porella spp.
Porella liverworts are fairly common in Missouri, but few people recognize them when they see one. These scaleworts are some of our many species of leafy liverworts — small, mosslike plants that form traceries on rocks or trees.
Fern moss, Thuidium species
Fern Mosses (Thuidium Mosses)
Thuidium spp.
Easy to identify, fern mosses look like tiny ferns. Just like many fern fronds, the branches lie on one plane and become shorter toward the tips. They even lean over like fern fronds.
Climacium moss, or tree moss, closeup showing treelike growth form
Tree Mosses (Climacium Mosses)
Climacium americanum and Climacium kindbergii
Tree mosses in genus Climacium look like miniature trees, complete with tiny upright trunks and long, slender branches clustered at the top. They form dense, thick mats in moist, shady places.
Dog tooth lichen showing thallus undersides and upraised, white lobe tips
Dog Tooth Lichen
Peltigera canina
Dog tooth lichen, Peltigera canina, is a foliose lichen that usually grows on soil. It’s common and easy to identify. The spore-bearing structures are rusty brown and rolled, standing upright at the lobe tips.
A variety of foliose lichens nearly covering the trunk of a small redbud tree, with redbud flowers in upper right
Lichens
About 436 species in Missouri
A lichen is a composite organism formed by certain fungus species that join with certain algae species. Lichens can be many colors and can be crusty, leaflike, flaky, branching, or mossy. They grow on rocks, trees, or other surfaces.
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About Mosses, Liverworts, and Lichens in Missouri

Mosses, liverworts, hornworts, and lichens seem rather similar, but these organisms are in very different groups. Mosses, liverworts, and hornworts are small, low plants usually found in damp habitats. Unlike more familiar plants, they lack veinlike structures and do not produce flowers or seeds — instead, they produce spores. Meanwhile, lichens are not plants at all: they are a collection of different fungi that have photosynthetic algae living within their tissues.