Agriculture Reference
In-Depth Information
2
CHAPTER
Level 2
Plants of the world
Figure 2.1
Sequoiadendron giganteum
(Giant redwood): seeds of this species were collected in
California by William Lobb in 1853
This chapter includes the following topics:
•
Geographical origins of plant culture
•
'Centres of origin'
•
World climatic zones
•
Britain and Ireland climatic zones
•
Plant hunters
•
World trade of horticultural plants
