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Morphology and Life Cycle
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Descriptions and microscopic images of strucutres of the mosses, liverworts and hornworts.
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Home Page The form of the gametophyte is varied, yet vegetative features common to many bryophyte gametophytes include: gemmae and rhizoids Reproductive features common among bryophyte gametophytes include: antheridia and archegonia. Vegetative Features Common to Many Bryophytes Gemmae in Bryophytes Gemmae are...A description of the male reproductive structure and a microscopic image.
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Mosses and Liverworts in Wales: Antheridia Antheridia are the male sexual organs of the gametophyte generation of mosses and liverworts. They consist of simple sacs with a wall usually only one or two cells thick, and with a short stalk. They may be enclosed by specialised...A description of the female reproductive structure and a microscopic image.
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Mosses and Liverworts in Wales: Archegonia Archegonia are the female organs of the gametophyte generation of a moss or liverwort. They consist of flask-like structures with an elongated neck, and at their base an egg cell. Above the egg cell run a line of canal cells,...Descriptions of the anatomical features of bryophytes.
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Mosses Although they can occur in deserts or be submerged in water, most mosses occupy moist, shaded habitats. Moss gametophytes are either erect or extensively branched prostrate plants that consist of an axis (commonly called a stem) bearing spirally arranged leaf-like...Their morphology & life cycles.
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Introduction to the Plant Kingdom ...A description of the main characteristics of mosses, liverworts and hornworts.
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Bryophyta Sporophyte has no direct connection with the ground, but is parasitic on the gametophyte. B. Gametophytes are always small rarely over a few inches, and are photosynthetic. C. Although bryophytes are land plants, they are still dependent upon water for...The structure of capsules and methods of spore dispersal.
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Spore dispersal in Bryophytes The sporophyte generation is short-lived. It comprises a capsule which produces spores by meiosis and a stalk which holds this aloft the gametophyte. The spores once released are dispersed by air currents and, once they settle somewhere moist, germinate. This...A longitudinal cross-section of a capsule.
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Capsula di Muschio in sezione longitudinale Capsula in sezione longitudinale in cui visibile l'opercolo, la columella e la massa delle spore. Pagina inizialeIndice Bryophyta...A description of the various methods of reproduction of bryophytes.
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Mosses and liverworts, simple plants? Parmentierwith photographs by the author Mosses (Bryophyta) are quite interesting, simple green land plants with leaves and a stem and always without roots. In many mosses, the leaves are only one cell thick, except for the midribs, which are sometimes...Image of the initial stage of protonemal development.
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Young protonema MC Image: Young protonema MC Young protonema MCPhotographer: Michael Clayton Up one directory. Main Page Suggestions? Comments? Last updated on: Thursday, September 30, 2004, 13:44:46. Page rendered: Thursday, September 30, 2004, 13:44:47. Time to render: 0.005 seconds. Server Statistics Web Server...A cross-section through an antheridia
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Antheridial head MC Click on the picture to zoom in on that part of the picture. Click here for high resolution image.Antheridial head MCPhotographer: Michael Clayton Up one directory. Main Page Suggestions? Comments? Last updated on: Thursday, September 30, 2004, 13:44:40. Page rendered:...An image of the male reproductive structure.
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Antheridium MC Click on the picture to zoom in on that part of the picture. Click here for high resolution image.Antheridium MCPhotographer: Michael Clayton Up one directory. Main Page Suggestions? Comments? Last updated on: Thursday, September 30, 2004, 13:44:41. Page rendered: Thursday,...A microscopic image of a cross-section through an antheridia at high magnification.
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Antheridia MC Click on the picture to zoom in on that part of the picture. Click here for high resolution image.Antheridia MCPhotographer: Michael Clayton Up one directory. Main Page Suggestions? Comments? Last updated on: Thursday, September 30, 2004, 13:44:39. Page rendered: Thursday,...A description of the characteristics and life cycle of mosses, liverworts and hornworts.
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Bryophytes They are found throughout the world. Although more prevalent in moist and shady areas, Bryophytes can be found in alpine regions, where they are subjected to freezing, and some in deserts, where they are desiccated most of the time. Many...Their life cycle and evolution.
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Mosses and Liverworts Evidence from the chloroplast genome Evidence from the mitochondrial genome Mosses and Liverworts (Bryophyta) Mosses and liverworts are traditionally classified together in the Division Bryophyta on the basis of their sharing: a similar life cycle (alternation of generations) similar reproductive...A description of the characteristics of the division.
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Characteristics of the Division Bryophyta All groups show clear alternation of generations. The gametophyte generation is dominant, conspicuous and independent. It may be thalloid or organized into leaf-like structures (phyllids which are not true leaves; lack cuticle and stomata. The sporophyte generation consists of a...The life cycle.
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Life Cycle of Mosses Generalized Life Cycle of Mosses A. c.s. of moss capsule, 10x. B. protonema with a gametophyte initial, 10x. C. c.s. of seta (sporophyte) 10x. Return to Main Menu Division Bryophyta...
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http://www.eou.edu/~kantell/img1030.jpg
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An image of a cross-section.
http://www.eou.edu/~kantell/img1029.jpg
A JPEG image.
http://www.eou.edu/~kantell/img1027.jpg
Images of gametophytes, sporophytes and protonema.
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Bryophytes After viewing an image click back to return to this page. Moss plants x2. The green leafy structures are gametophytes. The brown structures are sporophyte stalks and spore capsules. Moss protonema x100. Moss spores germinate into these fillamentous plants that...