Ward Rhododendron

Rhododendron wardii

Ericaceae · broadleaf evergreen shrub · introduced

Last updated

An evergreen shrub native to Yunnan, Sichuan (China), and southeastern Tibet, reaching 4 feet. Cup to saucer-shaped flowers about 2½ inches across, clear lemon to bright yellow, occasionally flushed rose. An important parent in yellow-flowered hybrid breeding lines.

One of the most important species in yellow rhododendron hybridization, contributing clear yellow color and cup-shaped flower form to cultivars like 'Crest'. The saucer-shaped flowers distinguish it from the tubular or funnel forms typical of most species. Acidic, well-drained soil. Twenty-one diseases and 15 pests documented at the genus level. All parts contain grayanotoxins and are toxic if ingested.

Quick Facts

Height
4 ft
Origin
China (Yunnan, Sichuan) and southeastern Tibet
Watch for this season

Root Colonization (Spring–Fall)

Infection at Bud Break

Apothecia Formation & Spore Release

RustHigh

Aecial Stage (Alternate Host)

+ 13 more — see full disease and pest lists below

Diseases: Regionally Documented (21)

Pests: Regionally Documented (15)

Data Maturity
Structured Multiple sources. Expert review underway.