Wakan Sansai Zue
The author of "Kyōwa Zakki" considered this to be similar to the kakuen from the "Bencao Gangmu", and since its characteristics are pretty much the same as in the "Wakan Sansai Zue", it can be seen that "Kyōwa Zakki" could have been written while referring to the "Wakan Sansai Zue". However, as previously stated, since the "Wakan Sansai Zue" didn't write any more than "this is probably a type of yamako," it has also been pointed out that it cannot conclusively be stated that the kuronbō and the kakuen are the same.