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Introduction to the Psilotales - http://www.ucmp.berkeley.edu/plants/pterophyta/psilotales.html
Includes descriptions of morphology and life history. |
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Division Psilotophyta - http://www.esu.edu/~milewski/intro_biol_two/lab_2_moss_ferns/Psilophyta.html
Description with links to images of Psilotum nudum and Tmesipteris tannensis. |
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Psilotaceae - http://www.botany.hawaii.edu/faculty/carr/psilot.htm
Division/family description and thumbnail links to images of two species of Psilotum from Hawaii. |
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Psilophyta - http://www.botany.hawaii.edu/faculty/webb/BOT201/PSILOTUM/Psilophyta-1.htm
Profusely illustrated description focussed on morphology and evolution. |
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Psilotaceae - http://www.botany.hawaii.edu/faculty/webb/BOT201/PSILOTUM/psilotum2.htm
Description and illustration of anatomical structure of species in Hawaii |