The Royal Society read part of Letter 51 of 1686-06-10 about how the leaves, root, and stem are wrapped up with the seeds

Date: 
July 10, 1686
Document: 

Birch, History, vol IV, p. 492, 30 June 1686 (O.S.) in London:

Part of a letter of Mr. LEEWENHOECK was read, containing his microscopical observations upon the seeds of several Indian plants, shewing how the leaves and the part designed for the root and stem are wrapped up within the said seeds.

Sources