Additional
Information: The Anthocerotophyta or Anthocerophyta are more commonly known as the hornworts. These are thought to be one of the oldest extant groups of land plants.
Hornworts consist of a flattened thallus with the gametangia produced along the midline
Thallus Thallus: A photograph of hornwort thallus. (Anthocerotophyta) http://botit.botany.wisc.edu/images/130/Bryophytes/Anthocerophyta/Thallus_MC.html
Stoma Stoma: A microscopic image. (Anthocerotophyta) http://botit.botany.wisc.edu/images/130/Bryophytes/Anthocerophyta/Stoma_MC.html
Hornworts Hornworts: A cladogram based on Hasegawa (1994). (Anthocerotophyta) http://www.is.kochi-u.ac.jp/Bio/mosses/cladogram4.html
Classification of hornworts Classification of hornworts: Four classification systems of the Anthocerotophyta. (Anthocerotophyta) http://www.wzip.uakron.edu/biology/hornworts/classification.html
Thallus cells Thallus cells: A microscopic image. (Anthocerotophyta) http://botit.botany.wisc.edu/images/130/Bryophytes/Anthocerophyta/Thallus_400x_MC.html
Hornwort Hornwort: A photograph of a hornwort with sporophytes. (Anthocerotophyta) http://botit.botany.wisc.edu/images/130/Bryophytes/Anthocerophyta/Hornwort_w_sporophytes_DH.html
Anthocerophyta Anthocerophyta: Gallery of images from the University of Wisconsin Botany Department. (Anthocerotophyta) http://botit.botany.wisc.edu/images/130/Bryophytes/Anthocerophyta/
Anthocerotophyta Anthocerotophyta: The classification of the hornworts based on Hyvonen & Piippo (1993), with references for taxonomic papers. (Anthocerotophyta) http://ucjeps.berkeley.edu/bryolab/tree/anthocerotophyta.html
Sporophyte Foot Sporophyte Foot: A microscopic image of a cross-section through the foot of a sporophyte. (Anthocerotophyta) http://botit.botany.wisc.edu/images/130/Bryophytes/Anthocerophyta/Sporophyte_foot_MC.html
Additional
Information: The Anthocerotophyta or Anthocerophyta are more commonly known as the hornworts. These are thought to be one of the oldest extant groups of land plants.
Hornworts consist of a flattened thallus with the gametangia produced along the midline
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