3H means tritium.
3H or 3-H may also refer to:
- 3H, or British Rail Class 205
- 3H Movement, a liberal Turkish youth organization
- 3H Biomedical, a Swedish biotechnology company
- Mu-3H, a model of Mu (rocket family)
- Yuri 3H, a Broadcasting Satellite (Japanese)
- SSH 3H (WA), alternate designation for Washington State Route 27
- Old Natchez Trace (230-3H); see Old Natchez Trace segments listed on the National Register of Historic Places
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction