皋月杜鹃

本种与南昆杜鹃的区别：叶缘具细圆齿，两面散生红褐糙伏毛；花冠鲜红色，长3-4厘米，具深红色斑点，雄蕊短于花冠，长1.6-2.2厘米。花期5-6月。

分布：原产日本

Rhododendron indicum (Linn.) Sweet in Brit. Fl. Gard., Ser. 2(2): subt. 128. 1833; Wils in Wils. et Rehd. , Monog. Azal. 22. 1921; Rehd. in Stevenson, Spec. Rhodod. 84. 1930;华南杜鹃花志51. 图6-2. 1983.——Azalea indica Linn. Spec. Pl. 150. 1753. ——A. macrantha Bunge in Mem. Soc. Etr. Sci. St. Petersb. 2: 115. 1833.——R. decumbens D. Don apud G. Don, Gen. Syst. 3: 846. 1834. ——R. breynii Planch. in Fl. des Serr. 9:79. 1854. ——R. danielsianum Planch. in ibid. 9: 79. 1854. ——R. lateritium Planch. in ibid. 9: 80. 1854. ——R. han- gnoense Nakai in Tokyo Bot. Mag. 29: 261. 1915.