Only a few plants in a population have seed available for collection. Can I take all of the seed from a single plant or should I only collect 10% of the seed from that plant?
To my knowledge the best practice is to be very cautious and take no more than 10% of the seed to allow for in situ regeneration. It would be best to collect a little seed from each fruiting individual rather than all your seed from one plant.
It may also depend what you specified in your permit. Ideally take no more than 10% from an individual plant. But if this is a very rare plant (less than 50 individuals in population) with imminent extirpation it may be appropriate to collect as much seed as possible as “emergency rescue.”