In a frond which is pinnate (feather-shaped), each leafy segment of the blade is called a pinna (plural pinnae), the stalk bearing the pinna is termed a petiolule, and the main vein or mid-rib of the pinna is referred to as a costa (plural costae).
Q. What is the function of the pinna in Ferns?
Frond, Leaf, or Blade: This is the part of the frond which bears leaflets or pinnae. This part of the plant is responsible for performing photosynthesis.
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Q. What is the pinna of a fern?
Pinna: – The primary division of a compound fern frond (Plural – pinnae). A distinct subdivision of the blade, when the blade segments are fully divided to the rachis.
Q. What structure does a fern have?
The structure of a fern. Ferns have 3 major parts – the rhizome, the fronds and the reproductive structures called sporangia. The characteristics of each of these 3 parts of the fern plant are used for classification and identification. The rhizome is the stem of the fern plant.
Q. What is the rarest plants on earth?
5 of the World’s Rarest and Most Endangered Plants
- Western Underground Orchid. This is truly a weird one: a plant that spends its entire life living underground.
- Pitcher plant. If you’ve never seen a pitcher plant before, you might be a little shocked by its appearance.
- Jellyfish tree.
- Corpse flower.
- Wood’s cycad.
Q. Does my fern need sunlight?
Ferns Need Plenty of Indirect Light Don’t expect them to grow in complete darkness though; without enough light, their leaves can turn yellow and the plant won’t grow. If your ferns can’t get enough natural light in your home, try using a grow light on them for a few hours a day to supplement.
Q. What is the rarest herb on earth?
Encephalartos Woodii One of the rarest plants in the world is the Encephalartos Woodii which is now conserved and restricted to the botanical garden only where it was transported from Zululand. This plant is found in South Africa and is considered being extinct in the wild with all specimens being clones of the type.
