Book  (1936)  Page(s) 341.  
 
Herdman, Iona (HT) McGredy 1914; glossy light orange-yellow, large, semi-double, fine form, lasting, solitary or up to 4, fragrance 5/10, floriferous, continuous bloom, long arching stems, small, sparse foliage, growth 6/10, upright.

Website/Catalog  (1929)  Page(s) 19.  
 
Everblooming Roses
The so-called Everblooming Roses include the Hybrid Tea and Pernetiana groups. They do not bloom all the time, but if kept healthy and growing steadily, one crop of flowers succeeds another at brief intervals.
Iona Herdman. Hybrid Tea. (S. McGredy & Son, 1914.) Rich yellow buds, opening to brilliant yellow flowers full of narrow petals; slightly fragrant. Fairly strong plant of open habit, blooming liberally; normal foliage.
A gloriously colored Rose whose only faults are a little weakness of the flower-stems and a slight tendency to mildew in damp weather.

Website/Catalog  (1925)  Page(s) 50.  
 
General List. (110) Iona Herdman (HT. McGredy 1914) F.2. Clear yellow of quite a distinct shade, but since the advent of 'Mabel Morse' it is likely to drop out of the lists. The growth is thin and straggly.....

Website/Catalog  (1925)  Page(s) 18.  
 
Iona Herdman, silvery orange, streaked colour, fragrant

Website/Catalog  (1924)  Page(s) 43.  
 
General List. (152) Iona Herdman (HT. McGredy 1914) F.3. .... a prostrate straggly grower.... A. H. M. Mt. P. S.

Website/Catalog  (1922)  Page(s) 26.  
 
(91) Iona Herdman (HT) (McGredy).F. 3 Clear yellow, of quite a distinct shade. Flowers of good shape. borne on rather wiry stems. The plant is a prostrate grower and does better on a standard.

Website/Catalog  (1921)  Page(s) 19.  
 
Roses.
Iona Herdman, pure, clear orange flame; class: Hybrid Tea; habit of growth: vigorous.

Magazine  (Jun 1920)  Page(s) 140.  
 
IONA HERDMANN. - (Mac Gredy), Fleur d'un jaune délicat, manque de duplicature.

Website/Catalog  (1914)  Page(s) 5.  
 
New Roses of other Raisers, 1914. The descriptions are those of the Raisers.
Hybrid Tea.
Iona Herdman (S. McGredy & Son). A pure, clear, orange flame, the greatest lift in colour yet attained in roses, surpassing Rayon d'Or in clearness and brightness, with the true Hybrid Tea growth and character. Without question the most beautiful yellow decorative rose in existence, and a rose that must be seen in order to grasp its wonderful colouring. The most striking novelty yet raised; it is sweetly scented, very free flowering, and of beautiful shape and form. Gold Medal, N.R.S. 7/6 each.

Book  (1914)  Page(s) 155.  
 
The New Seedling Roses of 1913. By H. E. Molyneux, Hon. Vice-President N.R.S.
The National Rose Society's Awards. Gloucester Show. -- July 15th, 1913.
Iona Herdmann (S. McGredy and Son), Gold Medal.— Another decorative Rose of great charm of colour, strikingly brilliant and exceedingly well staged, stated to be very free flowering and perpetual; if so it will be wanted as there is nothing quite like it. A very fine deep yellow. Not yet in commerce.