The life of a hornwort starts from a haploid spore. In most species, there is a single cell inside the spore, and a slender extension of this cell called the germ tube germinates from the proximal side of the spore. The tip of the germ tube divides to form an octant of cells, and the first rhizoid grows as an extension of the original germ cell. The tip continues to divide new cells, which produces a thalloid protonema. By contrast, species of the family Dendrocerotaceae may begin dividing within the spore, becoming multicellular and even photosynthetic before the spore germinates. In either case, the protonema is a tran ...

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Hornwort, Hornwort - Description, Hornwort - Life cycle, Hornwort - Classification of Hornworts

Read more here: » Hornwort: Encyclopedia II - Hornwort - Life cycle

See also:

Hornwort, Hornwort - Description, Hornwort - Life cycle, Hornwort - Classification of Hornworts

Read more here: » Hornwort: Encyclopedia II - Hornwort - Classification of Hornworts

The plant body of a hornwort is a haploid gametophyte stage. This stage usually grows as a thin rosette or ribbon-like thallus between one and five centimeters in diameter. Each cell of the thallus usually contains just one chloroplast per cell. In most species, this chloroplast is fused with other organelles to form a large pyrenoid that both manufactures and stores food. This particular feature is very unusual in ...

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Hornwort, Hornwort - Description, Hornwort - Life cycle, Hornwort - Classification of Hornworts

Read more here: » Hornwort: Encyclopedia II - Hornwort - Description

Mosses were traditionally grouped with the liverworts and hornworts in the Division Bryophyta (bryophytes), within which the mosses made up the class Musci. This group, however, is paraphyletic and now tends to be split up. In such system, the Division Bryophyta refers specifically to mosses. They appear to be the closest living relatives of the vascular plants. The mosses are grouped as a single class, now named Bryopsida, and divided into seven subclasses: Andreaeidae Sphagnidae Tetraphidae Polytrichidae Buxbaumi ...

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Moss, Moss - Overview, Moss - Life cycle, Moss - Classification of mosses, Moss - Habitat, Moss - Cultivation, Moss - Mossery, Moss - Commercial use of Mosses

Read more here: » Moss: Encyclopedia II - Moss - Classification of mosses

Botanically, mosses are bryophytes, or non-vascular plants. They can be distinguished from the apparently similar liverworts (Marchantiophyta or Hepaticae) by their multi-cellular rhizoids. Other differences are not universal for all mosses and all liverworts, but the presence of clearly differentiated stem and leaves, the lack of deeply lobed or segmented leaves, and the absence of leaves arranged in three ranks, all point to the plant being a moss. The division Bryophyta formerly included not only mosses, but also liverworts and hornworts. These other two groups of bryophytes now are oft ...

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Moss, Moss - Overview, Moss - Life cycle, Moss - Classification of mosses, Moss - Habitat, Moss - Cultivation, Moss - Mossery, Moss - Commercial use of Mosses

Read more here: » Moss: Encyclopedia II - Moss - Overview

Botanically, mosses are bryophytes, or non-vascular plants. They can be distinguished from the apparently similar liverworts (Marchantiophyta or Hepaticae) by their multi-cellular rhizoids. Other differences are not universal for all mosses and all liverworts, but the presence of clearly differentiated "stem" and "leaves", the lack of deeply lobed or segmented leaves, and the absence of leaves arranged in three ranks, all point to the plant being a moss. The division Bryophyta formerly included not only mosses, but also liverworts and hornworts. These other two groups of bryophytes now are oft ...

See also:

Moss, Moss - Overview, Moss - Life cycle, Moss - Classification of mosses, Moss - Habitat, Moss - Cultivation, Moss - Mossery, Moss - Commercial use of Mosses

Read more here: » Moss: Encyclopedia II - Moss - Overview