Asplenium

The genus Asplenium, or Spleenworts, is one of the largest and most diverse of the fern genera with around 650-700 living species which are found mostly in the tropics. It has a worldwide distribution, consisting of both terrestrial and epiphytic plants, which range in size from small species of a few centimeters to species with fronds of a meter or more in length. The largest species are to be found in tropical to subtropical habitats.

There are five Asplenium species endemic to California: Asplenium septentrionale, Asplenium trichomanes, Asplenium trichomanes-ramosum, Asplenium vespertinum, and Asplenium viride.

Click here for a distribution map for Asplenium in the United States and Canada (U.S. Department of Agriculture’s Natural Resources Conservation Service).

Click here for Adiantum in the the Encyclopedia of Life.

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