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Spore Shedding Vascular Plants

Spore Shedding Vascular Plants. Psilotum Lycopodium Equisetum. Huperzia a forest wetlands dwelling lycophyte These plants are the diploid sporophyte. Huperzia lucidula a wetlands-dwelling lycophyte. http://www.duke.edu/~jspippen/plants/lycopodium-lucidulum060727-3857bchmtnz.jpg.

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Spore Shedding Vascular Plants

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  1. Spore Shedding Vascular Plants Psilotum Lycopodium Equisetum

  2. Huperzia a forest wetlands dwelling lycophyte These plants are the diploid sporophyte

  3. Huperzia lucidula a wetlands-dwelling lycophyte http://www.duke.edu/~jspippen/plants/lycopodium-lucidulum060727-3857bchmtnz.jpg

  4. Huperzia root cross-section epidermis cortex protoxylem xylem metaxylem phloem plectostele exarch amphiphloic

  5. Protosteles: haplosteles actinostele plectostele cortexphloemxylem Siphonosteles: siphonostele solenostele dictyostele cortexphloemxylem pith leaf gap leaf trace eustele atactostele dicot stem monocot stem

  6. microphyll stem sporophyll sporangium spores gemma http://home.manhattan.edu/~frances.cardillo/plants/vascular/lucidum6.jpg last year’s sporophylls

  7. Huperzia root cross-section with branch root cross sections

  8. Huperzia microphyll cross section mesophyll cutinized epidermis vascular bundle stoma

  9. Lycopodium obscurum a forest-dwelling lycophyte The sporophylls are organized into a terminal strobilus. http://www.twofrog.com/images/groundpine58.jpg

  10. Lycopodium obscurum sporophytes demonstrate dichotomous branching. Microphylls are spirally arranged with some flattening of the branch system. Lycopodium obscurum strobili are not interrupted by microphylls. Sporophylls are not photo-synthetic.

  11. Strobilus Longisection sporophyll sterile jacket spores (1N) sporangium stalk All the spores are the same small size, so Lycopodium is homosporous. The spores are shed into the wind.

  12. Lycopodium gametophytes may be photosynthetic http://www.cas.vanderbilt.edu/bioimages/l/wlyal5-gamicro16920.JPG

  13. The sperm is flagellated and chemotactic http://www.botany.hawaii.edu/faculty/webb/bot311/bot311-00/LycoRepro/Lycopodium_sperm.jpg

  14. Diphasiastrum complanatum a forest-dwelling lycophyte http://www.duke.edu/~jspippen/plants/lycopodium-digitatum060709-8672alamancez.jpg

  15. Lycopodiella alopecuroides a grassland dwelling lycophyte http://128.253.177.181/users/robbin/9_7_05/upload90/Lycopodiella_X_gilmanii_ME48.JPG

  16. Lycopodium innundatum a bog-dwelling lycophyte http://farm2.static.flickr.com/1270/1048564007_47acf0621a.jpg?v=0

  17. Rhynia was a Psilotum-like swamp dwelling organism living with Protolepidodendron, the herbaceous ancestor of woody Lepidodendron in swamps during the Devonian period.

  18. Lepidodendron was a large lycophyte tree living in marshes. Dead plants and spores built up in the peat of the marshes, were later overrun with sediments, and by heat and pressure were converted to coal.

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