How many black lotuses exist?

Could you please clarify the context in which you're asking about the number of black lotuses? Are you referring to a specific ecosystem, a botanical garden, or perhaps a metaphorical concept? If we're discussing a real-world scenario, the answer would largely depend on the location and environment in question. Black lotuses, also known as Nelumbo nucifera 'Black Temple', are a rare variety of lotus flower that may not be present in every ecosystem. If you're referring to a specific collection or display, the answer would require direct information about that particular setting. Without more details, it's difficult to provide an accurate count of how many black lotuses exist. Could you elaborate on your inquiry?