Complex sentence: In 1874 H.C. Weinkauff proposed a system of seventeen genera for the 352 then known species of cones, which was adopted and followed by G. W. Tryon in 1884.
Split into simpler sentences: In 1874 H.C. Weinkauff proposed a system of seventeen genera for the 352 then-known species of cones. This system of classification was adopted by G. W. Tryon in 1884.