From J. H. Nicolas' patent application for 'Mrs. Francis King'

Of this new strain referred to, the variety Leonard Barron was first to be disseminated, this being the first ever-blooming garden rose evolved from R. Nutkana of Alaska. Its genealogy is (R. Nutkana X Paul Neyron) X Souvenir de Mme. Boullet, a yellow hybrid tea, but due to the fact that it is nearly sterile as a female, it was not used as the seed bearer for the origination of the present variety. However, I found that the pollen of Leonard Barron is very potent and capable of reproducing its plant characters which I desired to breed into the new rose.

Brooklyn Botanic Garden Record  28: 192-193 (1939)

Leonard Barron (1931) has large, double flowers with coppery salmon centers surrounded by a collarette of shell-pink petals. Apart from being a good garden rose, it is of great interest because of its ancestry. The Rev. G. M. A. Schoener, by crossing R. nutkana, a wild rose, whose range extends from Alaska to Wyoming and California, with a H. P. (Paul Neyron), produced Schoener’s Nutkana. This variety was combined by J. H. Nicolas with Souvenir de Mme. Boullet, a Hybrid Tea, from which cross the rose Leonard Barron originated. This may perhaps be considered the forerunner of a new strain of Hybrid Tea roses.

Success with Roses (1935?) p. 11
Conard-Pyle Co.

Noteworthy Nutkana

"At what age should a young lady make her debut?"

That question stares us in the face for an answer almost every year regarding our own Rose children. There are some which we never present; for others there is never any question, after we get to know them, but that they deserve a proper "coming out party", and sometimes we realize upon their presentation to the public, how far they are from complete maturity. Not until the third year in commerce do some of our new Roses seem fully to develop their possibilities. In consequence we find such Roses making very little impression the first year and then they begin to gain in favor and build up their popularity. This has been the case with the Rose Leonard Barron, remarkable not only for the great size of its flowers, but for the extraordinary quality of plant growth and hardiness, and this in turn, we believe, dates back to its parentage — Schoener's Nutkana.

Going back another generation we find the parentage of Schoener's Nutkana was Rosa Nutkana crossed by Paul Neyron, a triumph on the part of the Rev. George M. A. Schoener, who succeeded in thus breeding with a Hybrid Perpetual this wild Species (Nutkana) from British Columbia, the stock of which is also used for making Tree Roses.

The Rose Leonard Barron, mentioned above is the largest, full petaled Hybrid Tea Rose as far as our knowledge goes. The blooms are 5 inches in diameter and the color is salmon, copper and shell pink, well blended. The fragrance is like red cedar.