The apex (point away from its attachment) of the spur is generally pointed, round, obtuse, or rarely truncated. However, few orchid flowers produce spurs with its apex bilobed (also referred to as 2-lobed).
The reasons that make the apex of the spur unique is a topic least researched. However, it has to be believed that this characteristic is related to certain pollinator behaviour.
Post 19 – 15/October/2020