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A genus of the plants known as liverworts. The body is a simple flat thallus and produces a slender spore-case.

Anthoceros Showing Thallus with Two Capsules

A genus of the plants known as liverworts. The body is a simple flat thallus and produces a slender…

A genus of the plants known as liverworts. The body is a simple flat thallus and produces a slender spore-case.

Anthoceros, Mature Capsule Splitting

A genus of the plants known as liverworts. The body is a simple flat thallus and produces a slender…

"1. Shields of Variolaria amara; 2, a portion of the thallus of the same plant." -Lindley, 1853

Lichen

"1. Shields of Variolaria amara; 2, a portion of the thallus of the same plant." -Lindley, 1853

"5. shield of Opegrapha scripta; 6. thallus of the same." -Lindley, 1853

Lichen

"5. shield of Opegrapha scripta; 6. thallus of the same." -Lindley, 1853

"Life-history of Liverwort (Marchantia polymorpha): 1 and 2, developing thallus; 2 shows the cup with gemmae; 3, section across thallus, showing chimney-shaped stoma and green cells under, and mucilage cell on left; 4, male hats; 5, development of antheridia; 6, antheridium nearly ripe; 7, antherozoid; 8, female hat; 9, 10, archegonia before fertilization; 11, 12, 13, fertilized egg dividing; 14, immature sporogonium, containing spores and elaters." -Hazeltine, 1894

Liverwort Life Cycle

"Life-history of Liverwort (Marchantia polymorpha): 1 and 2, developing thallus; 2 shows the cup with…

"3. a piece of the thallus of Sticta pulmonacea, with lacunae and soredia; 4. thallus of the same, bearing shields." -Lindley, 1853

Tree Lungwort

"3. a piece of the thallus of Sticta pulmonacea, with lacunae and soredia; 4. thallus of the same, bearing…

This illustration shows the structure of the thallus of Ricciocarpus: A, section of the thallus, showing the apical cell, x, forming cells that by further division develop into plates of cells separated by air spaces, j. At the left the plates thus formed are seen curving over the apical cell. B, an olderp ortion of the upper part of the thallus. The air spaces, j, are greatly enlarged and the upper cells of the vertical plates have divided, arching over the air spaces but leaving small openings which permit the entrance of air for photosynthesis.

Ricciocarpus

This illustration shows the structure of the thallus of Ricciocarpus: A, section of the thallus, showing…

"Section of Stratified Thallus of Ricasolia herbacea. a, cortical stratum; b, gonidial stratum; c, medullary stratum." —The Encyclopedia Britannica, 1910

Thallus

"Section of Stratified Thallus of Ricasolia herbacea. a, cortical stratum; b, gonidial stratum; c, medullary…

"Section of Unstratified Thallus of Collema conglomeratum, with Moniliform Gonimia scattered amongst the Hyphal Filaments." —The Encyclopedia Britannica, 1910

Thallus

"Section of Unstratified Thallus of Collema conglomeratum, with Moniliform Gonimia scattered amongst…