Ask the Chatbot Games & Quizzes ProCon History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture Money Videos
Psilotopsida
Directory
References
Discover
The Cheshire Cat is a fictional cat from Lewis Carroll's Alice's Adventures in Wonderland. (Alice in Wonderland)
11 Banned Books Through Time
Santa Claus flying in his sleigh, christmas, reindeer
Was Santa Claus a Real Person?
Iraqi Army Soldiers from the 9th Mechanized Division learning to operate and maintain M1A1 Abrams Main Battle Tanks at Besmaya Combat Training Center, Baghdad, Iraq, 2011. Military training. Iraq war. U.S. Army
8 Deadliest Wars of the 21st Century
Baseball laying in the grass. Homepage blog 2010, arts and entertainment, history and society, sports and games athletics
10 Greatest Baseball Players of All Time
Woman tied to a ducking stool, a method of punishment by means of humiliation, beating, or death. (cucking stool)
8 Unusual Punishments Inflicted on Women Throughout History
Thumbnail for flags that look alike quiz Russia, Slovenia, Iceland, Norway
Flags That Look Alike
Los Angeles Police Department wanted flyer on Elizabeth Short, aka the "Black Dahlia," who was brutally murdered in January 1947. The FBI supported the Los Angeles Police Department in the case, including by identifying Short through her fingerprints that
America’s 5 Most Notorious Cold Cases (Including One You May Have Thought Was Already Solved)

Psilotopsida

fern taxon
Also known as: Ophioglossidae, Psilotophyta, psilotophyte, whisk fern

Learn about this topic in these articles:

major reference

    annotated classification

    • weeping willow tree
      In plant: Annotated classification

      Class Psilotopsida (whisk ferns) Vascular plants; sporophyte lacking roots and often leaves; stems with small enations, dichotomously branched; vascular tissue forming a central core in stem (protostelic); sporangia fused into synangiate structure, apparently terminal on short stem; homosporous; gametophytes subterranean, with motile sperm; representative genus, Psilotum

      Read More
    • tree fern
      In fern: Annotated classification

      Ophioglossidae Order Ophioglossales Family Ophioglossaceae (adder’s tongue, grape ferns, moonworts) Plants usually with somewhat fleshy stems and roots; leaves divided into sterile and fertile segments, these variously entire to highly divided, not developing through

      Read More