Generic sample from Gossypium arboreum
Gossypium arboreum
A2 designation assigned to Gossypium arboreum.  It is one of 2 species of 2-genome Gossypium species found in East Africa and Central Asia.  The DNA sequence of the A2 coding regions are closely related to the A-genome in allotetraploid cotton (AD).  A2 is a plant that was grown in the Pohl Conservatory on top of Bessey Hall at Iowa State University in the care of Dr. Jonathan Wendel.