Parasitic Plants:
http://www.parasiticplants.siu.edu/
http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7496.html
  Plant Anatomy / Physiology
http://faculty.weber.edu/sharley/1203/anatomy.html
http://www.tantebazar.com/gardening_histology_of_plant_part_1.php
  Phylogeny
http://www.uwyo.edu/krist/biol2022/powerpoints/lecture2_2022_11.pdf
Language Skills:
Pollinating (submitted by Christina - thanks!)