Fifteen-ball, fifteenball, 15 ball, or 15-ball may refer to:
- 15 ball, the pool (pocket billiards) ball numbered "15", and traditionally colored with a brown or maroon stripe, but a tan stripe in some ball sets
- Fifteen-ball pool, a pocket billiards game covered in the Billiard Congress of America rulebook
- Rotation (pool), sometimes called fifteen-ball, a pocket billiards game (different from the above), played with fifteen object balls that are shot at in numerical order, and of which the 15 ball is the game-winning ball
- 15-ball, a fifteen-dimensional n-ball in mathematics
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