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'Helen Knight' rose References
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Book (1997) Page(s) 118, 119. Includes photo(s).
Page 118: [Photo]
Page 119: Helen Knight F.P. Knight (UK) 1966. R. ecae x R. pimpinellifolia 'Altaica'... large, slightly cupped, single, deep yellow flowers... fern-like foliage...
Book (Feb 1993) Page(s) 266. Includes photo(s).
Helen Knight Species hybrid shrub. Parentage: Thought to be R. ecae x a Scotch rose. England 1970. Description and cultivation... The foliage is fern-like, resembling that of R. ecae, and the slender stems are covered with small, clear yellow, cup-shaped flowers...
Book (1988) Page(s) 16. Includes photo(s).
Helen Knight This seedling of R. ecae originated from a plant growing on the wall of the Director's house at Wisley. The other parent is said to be R. pimpinellifolia 'Grandiflora' which was growing nearby. It was raised by F. P. Knight, then Director, in 1966 and named after his wife. It makes a bush up to 3 m on a wall, with red-brown twigs and rich yellow flowers, larger than those of R. ecae.
Website/Catalog (1986) Page(s) 21. Helen Knight..... Cg.
Website/Catalog (1985) Page(s) 24. Helen Knight.....Small saucer shaped, rich, clear yellow flowers.
Book (1983) Page(s) 163.
["Disputed Origins" by A. V. Roberts]
...'Helen Knight' was raised from seed collected from R. ecae. Knight (1978) reasoned that the only likely pollen parent was R. spinosissima. As R. ecae is a diploid species with 14 chromosomes, a plant of this parentage would be triploid with 21 chromosomes. I found, however, that it had 14 chromosomes. 'Helen Knight' is therefore, more likely to have arisen from self-fertilization of R. ecae. Incidentally, this should encourage use of this very attractive rose for breeding, because a diploid rose is more likely to be fertile than a triploid one.
Website/Catalog (1982) Page(s) 19.
Helen Knight (Hybrid of r. Ecae) Saucer shaped, rich, clear yellow flowers borne abundantly in late May to June amid fernlike foliage. 1970’s.(S) 6 x 4’
Book (1978) Page(s) 160.
F. P. Knight. Rose 'Helen Knight'......
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