title: Freeze-etched pollen walls of Artemisia pycnocephala and Lilium humboldtii.
mesh_terms: D002473:Cell Wall; D005613:Freeze Etching; D005615:Freezing; D006652:Histological Techniques; D008722:Methods; D008854:Microscopy, Electron; D011058:Pollen / Q000166:cytology*