Columbia subject headings:
Harvard subject headings:
Plant morphogenesis--Congresses.
Plant morphology--Congresses.
Plant physiology--Congresses
Plants--Adaptation--Congresses
Plants--Evolution--Congresses
Primary productivity (Biology)--Congresses.
Princeton subject headings:
Plant morphogenesis--Congresses.
Plant morphology--Congresses.
Plant physiology--Congresses.
Plants--Adaptation--Congresses.
Plants--Evolution--Congresses.
Primary productivity (Biology)--Congresses.