21. Bermuda maidenhair fern is sometimes grown in gardens; however, it is not hardy and does better indoors. 22. Ferns grow between the rocks such as Wall-rue, Maidenhair Spleenwort and Hart's-tongue. 23. A good example of this is the currently designated species " Asplenium trichomanes " ( Maidenhair Spleenwort ). 24. A . That gardener knows that of the 300 species of Adiantum, maidenhair fern, a few are quite hardy. 25. This feature easily distinguishes this species from the very similar-looking maidenhair spleenwort, " Asplenium trichomanes ". 26. This subfamily includes the previous families Adiantaceae ( adiantoids or maidenhair ferns ) and Vittariaceae ( vittarioids or shoestring ferns ). 27. A trip to Havasu Creek gives hikers a chance to cool down in turquoise-colored pools, lush with Maidenhair ferns. 28. Ginkgophyta was once a widespread diverse group of which the only survivor is the maidenhair tree " Ginkgo biloba ". 29. Only a few of the plant drawings can be identified with reasonable certainty, such as a wild pansy and the maidenhair fern. 30. Species native to North America include " A . jordanii " ( California Maidenhair ) is native to the west coast.