Re: Some petiolaris complex plants
Drosera have two types of glands on their traps. The first are the ones that you see with the large globs of dew on them. These are for trapping the insect. The tentacles that these are on are 'mobile'. This means that they can move. This is what causes the leaf of some species to move and roll around prey. They respond to the movement of the prey. When prey begins to struggle the adjacent tentacles move towards the stimulus to help 'hold' the prey. This helps ensure that the trap holds prey and also increases the surface area that is in contact with the prey. This helps in digetion as the glands responsible for digestion are held closer to the leaf and these are not mobile. Therefore if the tentacles that are able to move increase the amount of leaf agaoinst the prey the easier it is to digest the prey as more digeative glans are in contact. Hope this makes sense. Let me kn ow if anything isn't too clear and I will try and clarify. Cheers.
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