Rhododendron obtusum

subsp. var.
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Standard Cyclopedia of Horticulture

Rhododendron obtusum, Planch. (R. indicum var. obtusum, Maxim. Azalea obtusa, Lindl.). Low, much-branched shrub: lvs. persistent, obovate, rounded and mucronulate at the apex, dark green and lustrous above, strigose on the midrib beneath, 1/2-1 1/2 in. long: fls. 2-3; sepals ovate, small, ciliate; corolla funnelform, orange-red or pink, 1-1 1/2 in. across; stamens 5; anthers yellow. May. Japan. B.R. 32:37. G.C. II. 25:585. R.H. 1876:370. Gn. 67, p. 190. Var. album, Schneid., (Azalea obtusa alba, Hort.). Fls. white. G.F. 9:395. Var. calyciflorum, Schneid. (Azalea calyciflora, Hort.). Fls. brick-red, corolla double (hose-in-hose). Var. amaenum, Rehd. (R. amaenum, Planch. Azalea amaena, Lindl.). Lvs. elliptic or elliptic-obovate, acute or obtusish, 1/2-1 in. long, dark green: corolla usually double (hose-in-hose), purple. 1/2-1in. broad; stamens 5; anthers often purple. April, May. B.M. 4728. F.S. 9:885. G.C. III. 23: fig. 125. A.G. 15:373; 18:568. Gng. 2:385; 11:289. A.F. 12:33; 20:751. F.E. 9:573. J.F. 4:329. This variety, of which the wild parent plant is unknown, seems to have some relations to R. Simsii and may be of hybrid origin. It flowers early and very abundantly; hardy north to N. Y. There are some forms and crosses of this variety of which the following may be named: album, with white fls. M.D.G. 1903:476; Cald-wellii, with larger purple fls. (Geert, Ic. Az. 18); G. 32:21; Marvel, lilac-carmine, double (F.M. 11; 14); Princess Maud, rosy magenta (R.H. 1886:516); Mrs. Carmichael, crimson-magenta; Princess Beatrice, bright mauve; Prime Minister, soft pink; Miss Buist, pure white; Hexe (Firefly), deep crimson. In Japanese gardens a large number of named varieties of R. obtusum, varying in shades from white to deep crimson, are grown; one of the best known of them is Hinodigiri, with brilliant crimson fls. The above text is from the Standard Cyclopedia of Horticulture. It may be out of date, but still contains valuable and interesting information which can be incorporated into the remainder of the article. Click on "Collapse" in the header to hide this text.

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References

• Standard Cyclopedia of Horticulture, by L. H. Bailey, MacMillan Co., 1963

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