When did Heinrich Schrader - botanist die?

There doesn't appear to be a well-known botanist named "Heinrich Schrader". It's possible there's a misspelling or a less common name.

To help you find the information you need, please provide:

* Full name of the botanist: Including middle name if available.

* Possible dates of birth/life: Even a rough estimate can be helpful.

* Any other details about their work or life: Where they worked, what plants they studied, etc.

With this information, I can try to find the date of their death.