It has a chromosome count : 2n = 20 and then by Avishai & Zohary in 1977 .
= 20 was first counted by Marc Simonet in 1954 .
It has a chromosome count : 2n = 20 , which was first counted by Marc Simonet in 1954 , and then by Avishai & Zohary in 1977 .