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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 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
Huperzia root cross-section epidermis cortex protoxylem xylem metaxylem phloem plectostele exarch amphiphloic
Protosteles: haplosteles actinostele plectostele cortexphloemxylem Siphonosteles: siphonostele solenostele dictyostele cortexphloemxylem pith leaf gap leaf trace eustele atactostele dicot stem monocot stem
microphyll stem sporophyll sporangium spores gemma http://home.manhattan.edu/~frances.cardillo/plants/vascular/lucidum6.jpg last year’s sporophylls
Huperzia microphyll cross section mesophyll cutinized epidermis vascular bundle stoma
Lycopodium obscurum a forest-dwelling lycophyte The sporophylls are organized into a terminal strobilus. http://www.twofrog.com/images/groundpine58.jpg
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.
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.
Lycopodium gametophytes may be photosynthetic http://www.cas.vanderbilt.edu/bioimages/l/wlyal5-gamicro16920.JPG
The sperm is flagellated and chemotactic http://www.botany.hawaii.edu/faculty/webb/bot311/bot311-00/LycoRepro/Lycopodium_sperm.jpg
Diphasiastrum complanatum a forest-dwelling lycophyte http://www.duke.edu/~jspippen/plants/lycopodium-digitatum060709-8672alamancez.jpg
Lycopodiella alopecuroides a grassland dwelling lycophyte http://128.253.177.181/users/robbin/9_7_05/upload90/Lycopodiella_X_gilmanii_ME48.JPG
Lycopodium innundatum a bog-dwelling lycophyte http://farm2.static.flickr.com/1270/1048564007_47acf0621a.jpg?v=0
Rhynia was a Psilotum-like swamp dwelling organism living with Protolepidodendron, the herbaceous ancestor of woody Lepidodendron in swamps during the Devonian period.
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.