Rhododendron ovatum
Billeder af Rhododendron ovatum
Beskrivelse
R. ovatum (Azaleastrum). Kompakt stedsegrøn busk med glatte ovale blade. De skinnende, små og afrundede blade er ganske attraktive, især i de nye vækst fase, som er lyserød til rødlig. De smukke blomster kommer i maj og er hvide til lyserøde eller purpurrøde, typisk plettede og undertiden med en gullig blotch. En variabel og udbredte art, der klarede sig bedst i områder med varme somre. Vildtvoksende over store dele af Central-og SØ Kina, samt Taiwan. Forekommer i forskellige habitater fra havets overflade til 2000 m. Sjældne i dyrkning, men hårdføre arter har vi, som bør stå beskyttet mod senfrost.
Hans Eiberg
En plante fejlmærket R. ovatum er muligens den Tue J kalder “den hollandske klon” af R. minus carolinianum (Ole Jonny Larsen).
ARS
Treeflower, Japan
RBGE Herbarium; R. ovatum
Kew’s Herbarium
Flora of China
R. ovatum (Lindley) Planchon ex Maximowicz, Bull. Acad. Imp. Sci. Saint-Pétersbourg. 15: 230. 1871.
Azalea ovata Lindley, J. Hort. Soc. London 1: 149. 1846; Rhododendron lamprophyllum Hayata; R. ovatum var. lamprophyllum (Hayata) Y. C. Liu; R. ovatum var. prismatum P. C. Tam; R. ovatum var. setuliferum M. Y. He.
Shrubs, 2–4(–6) m tall; young shoots sparsely glandular-hairy and pubescent. Petiole ca. 8 mm, narrowly winged, pubescent; leaf blade ovate to oblong-elliptic, 3.5–5 × 1.9–2.5 cm; base rounded or rarely broadly cuneate; margin slightly curved; apex acute and mucronate; adaxial surface glabrous or pubescent; lateral and net veins inconspicuous abaxially. Inflorescence subapical, 1-flowered. Pedicel 0.8–1.8 cm, densely gray-brown pubescent, also with short glandular hairs; calyx deeply lobed; lobes ovate or oblong-ovate, 4–5 × 3–4 mm, densely gray-brown pubescent, also sparsely glandular hairy at base abaxially, margin glabrous; corolla rotate, purplish, purple, or pink, with purple flecks inside tube, 1.6–2.3 cm, outer surface glabrous, inner surface puberulent; lobes oblong-obovate or broadly obovate; stamens 5, unequal, 1.5–2.1 cm, slightly shorter than corolla, filaments flat, pubescent in lower half; ovary ovoid, with dense short glandular hairs; style ca. 2.4 cm, exserted, glabrous. Capsule broadly ovoid, ca. 8 × 6 mm, densely gray-brown pubescent, also sparsely glandular. Fl. Apr–May, fr. Jul–Oct.
Thickets; 300–1600 m. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangsu, Jiangxi, Sichuan, Taiwan, Zhejiang.
Gao Lianming (pers. comm.) notes that recent field studies have shown that the differences used to separate var. setuliferum from the type of the species, namely the narrower leaf blade and the style with dense bristles near the base, are not even borne out by the type of this variety, and in any case these features vary continuously between the two varieties.