What details about the mulberry tree does the speaker describe in “Mulberry on the lowland”?

By this statement, Robert Putnam meant that the informal social ties promote more efficient bureaucracy than the formal sectors.

Explanation:

In this analogy given by Robert Putnam, he represented the informal social ties with the choral societies and the formal social tie with the health sector.

There is always delay in  processes and activities due to an inefficient bureaucracy in these formal settings. The informal social ties handle bureaucracy  more efficiently than the formal setting