Rhododendron pachysanthum (Chinese: 台湾山地杜鹃; pinyin: Táiwān shāndì dùjuān),[1] the thick-flowered rhododendron,[2] is a species of flowering plant in the heath family Ericaceae, that is native to Taiwan.

This species is particularly noted for its 9 cm (3.5 in) leaves, which may be heavily felted on both surfaces, red above and brown beneath.

In early spring, trusses of pale pink flowers appear, spotted crimson on the inner surface.

[2] In cultivation in the UK Rhododendron pachysanthum has gained the Royal Horticultural Society's Award of Garden Merit.

[2][3] It is hardy down to −15 °C (5 °F) but like most rhododendrons it requires a sheltered spot in dappled shade, and an acid soil enriched with leaf mould.