American Rhododendron Society Plant Registry
Note: It is proposed to print the names and brief description of new American varieties which meet the requirements for registration. The names must be accompanied by descriptions of the varieties and must meet the requirements of the International Registration Authority (Dr. H. R. Fletcher, Royal Botanic Garden, Edinburgh, Scotland) before they are eligible for A.R.S. registry. Only clones will be registered, no group names. In the formula giving the parentage, the female parent is written first. We hope, whenever possible to indicate the probable size of the bush at 10 years of age. Unless otherwise specified the person's name, following the cross, indicates the one who made the cross, did the selecting, and introduced, or plans to introduce the variety. Breeders are urged to submit proposed names to the Registrar of the A.R.S., Dr. J. Harold Clarke, Long Beach, Wash., before they are actually used. There are thousands of names already in use and a name to be registered must not have been used before and must meet the other requirements of the A.R.S. Code of Nomenclature.
CAROLINE GEM - 'Elizabeth' X 'Caroline' raised and introduced by Mrs. John Knippenberg, Laurelwood, Gardens, Wayne, N. J. Plant 30" tall by 30" across at 10 years, compact mound; leaves 3¼" long by 1" wide, glossy. Flowers carmine rose, slight coral flush, buds HCC 621, open flowers 621/2, bell shaped to 4" across. Conical truss of 10 to 12 flowers. Mid May.
BLUSH BUTTON - 'C. O. D.' X 'Honeydew' raised and introduced by Mrs. John Knippenberg, Laurelwood Gardens, Wayne, N. J. Plant 5' high by 6' across at 10 years. Flowers cream colored, HCC 407/1, bud shaded coral red, to 3" across, with 6 to 8 lobes, with a button in the center, no stamens. Flat shaped truss of 8 flowers. Mid season.
IRRESISTIBLE - Hino Crimson' X 528 'Salmon Elf' raised and introduced by Robert L. Pryor, Ornamentals Investigations, Crops Research Division, A. R. S., U. S. D. A., Beltsville, Md. Known as No. 60-7. Plant very dwarf, rather compact, about 1½ times as wide as high. Leaves persistent, grayish-green with white margins. Very floriferous, two to three flowers per cluster. Flowers hose-in-hose, back hose imperfect, spinel red, Ridgeway XXVI 71 V. R. R., 1½" X 1½", stamens 5 to 7, same color as petals.
HARDY GIANT - R. fortunei X R. fictolacteum raised and introduced by Mrs. John Knippenberg, Laurelwood Gardens, Wayne, N. J. Plant upright, 6' high by 6' across in 10 years. Leaves to 9" long by 3" wide, heavy substance. Flowers creamy white, HCC 503/1, with raspberry blotch, to 3¼" across. Conical truss of 14 flowers. Mid May. Very hardy.
LAUREL PINK - 'Boule de Neige' X R. catawbiense X 'F. C. Puddle'. Raised and introduced by Mrs. John Knippenberg, Laurelwood Gardens, Wayne, N. J. Plant 24" high by 30" wide at 12 years, dwarfish, mound shaped. Leaves williamsianum type, almost round, 1¾" long by 1¼" wide. Flowers neyron rose, frilled, bud HCC 623, open flower 623/3, 6 or 7 lobes, to 2" in diameter in a rounded truss of 10 to 12 flowers. Late April.
WAYNE PINK - raised and introduced by John Knippenberg, Laurelwood Gardens, Wayne, N. J. A Dexter seedling. Plant 6' high by 6' wide at 12 years. Leaves to 7" long by 2½" wide. Flowers spirea red HCC 160/3, to 3½" across. Dome shaped truss, 7" high with 19 to 22 flowers. Late May.