And, on a different direction, I recommend Lynn Margulis as a prime leader
for her development of concepts embedded in "Gaia".
Another mover and shaker was Metasuche Brown for her work in cotton
Beryl Simpson in systematics is another prime candidate.
And, Katherine Esau is the leader of plant anatomy for the first half of
this century, and still stands tall.
That's at least a start off the top of my head. Good luck.
R. H. (Dick) Richardson Office: 512-471-4128
Zoology Dept. Home: 512-476-5131
Univ. of Texas FAX: 512-471-9651
Austin, TX 78712