Book  (2007)  
 
Edward Hyams Shrub, yellow blend. Intro.: 1972. Collected in Sharud, Iran in 1972.

Book  (1988)  Page(s) 18.  Includes photo(s).

Book  (1984)  Page(s) 81.  
 
Tthe other exhibit in Class 1 was a magnificent pot of Hulthemosa 'Edward Hyams' staged by our Hon Scientific Adviser, Ted Allen...... To the lay observer, the distinguishing feature of Hulthemosa is the unique deep yellow colour, the like of which is not to be found in any other rose. The more knowledgeable will have taken note of the healthy looking foliage and the quality of the stems.

Book  (1983)  Page(s) 163.  
 
["Disputed Origins" by A. V. Roberts]
...E. F. Allen (1978), deduced that Hulthemosa 'Edward Hyams' was tetraploid. This would have explained observations by the late Edward Hyams, which suggested that it had arisen from seed collected from a fertile Hulthemosa in Iran. Disappointingly, it proved to be diploid, with 14 chromosomes, and what would have been the first record of a fertile Hulthemosa cannot be corroborated.

Book  (1979)  Page(s) 167.  
 
E. F. Allen. A New Hulthemosa Found Wild in Iran.
In the Illustrated London News of August 1973, the late Edward Hyams, who was a most experienced horticultural journalist, wrote the following passage.....