Plants

Watercress is a perennial, hydrophytic plant (an aquatic plant whose renewal buds overwinter in water).

It belongs to approximately 37% of endemic plant species from Socotra Island.

Saguaro has very sharp and durable spines.

Corn is a staple food in many regions of the world.

Topinambur is native to North America.

The poinsettia, outside its natural habitat, is grown as a potted flower and various chemicals are used to limit its growth.

They are a rich source of vitamin C, with as much as 66 mg of it in 100 grams.

The cocoa tree needs a humid, hot climate with small daily and annual temperature fluctuations - such conditions are provided by the equatorial climate.

It can survive long periods of drought (xerophyte). It is an adaptation to Mediterranean conditions (250 to 500 mm of annual rainfall). However, it needs 500 to 550 mm of annual rainfall to bear fruit. 

Baobab species growing in Madagascar have more compact crowns and long, cylindrycal trunks compared to those growing in continental Africa.