Rhododendron obtusum
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Read about Rhododendron obtusum in the Standard Cyclopedia of Horticulture
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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.
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References
- Standard Cyclopedia of Horticulture, by L. H. Bailey, MacMillan Co., 1963
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