Ophioglossum
Ophioglossum pendulum always interested me, since it grows in association with some of the platycerium species.
I grow three distinct types of Ophioglossum pendulum. The one above has narrow, flat fronds. This type is somewhat more difficult for most of us, and for some unknown reason, it does not adapt to basket culture. It seems to require mounting.
The form above is the most common, and the easiest to grow. It has slightly wavy fronds.
The broad form has been very uncommon, but is easily the most decorative type.
A comparison of the three types of Ophioglossum pendulum.
Often found growing with Asplenium sp. (birdnest ferns), or Platycerium coronarium, Ophioglossum pendulum can be grown without a host, once well established.
Ophioglossum pendulum fern likes to stay wet. Surprisingly, it seems to respond well to fertilizer.