Some Spirit Plants could be harvested just by gently pulling them from the roots while others require a more complicated procedure
As for the Bellmond Flower, as it is a common Spirit Plant, it is something that could be easily harvested as long as one was gentle enough and didn't damage any part of it
The Bellmond Flowers contained five pointy purple petals and since only the flowers are needed, Rezen used a bit of mana to cleanly slice the flowers from the stems
Since these flowers are common, they won't net Rezen a lot of money and after harvesting several of them, he gathered mana at his feet to head deeper into the valley
While his physique is not comparable to Body Mages, he could still do the things that they usually do such as using the mana on their feet to increase their speed
This area is still close to the entrance and there might be hidden mages that could see what he was doing. If they saw him trying to smuggle the resources, that would be bad