Fern Stalk Cross Section Spore-producing plants belonging to the division Filicophyta are commonly referred to as ferns. The primitive vascular plants are extremely diverse and have been present on Earth for over 300 million years.
Subtractive Color- mixed with pigments. Primaries are RED, BLUE, and YELLOW. When pigments are mixed, each color SUBTRACTS from the total light rays, and the combination color is DARKER in value. All hues combined equal BLACK.