討論:五花药组

山羊百科，林文智老師的植物、山岳、攝影紀錄

杜鹃花科　Ericaceae

杜鹃属　Rhododendron

羊踯躅亚属　Rhododendron subg. Pentanthera

五花药组　Rhododendron sect. Pentanthera

落叶灌木，稀乔木状；小枝近于轮生，被刚毛、短柔毛或无毛。冬芽具多数覆瓦状排列的鳞片。叶散生。花序有花多朵到数朵，出自顶芽，叶枝出自下部侧芽；花萼通常小；花冠漏斗形，花冠管与裂片等长或长过裂片；雄蕊5，伸出于花冠外；子房被糙伏毛或刚毛，常具腺体，花柱无毛或中部以下被短柔毛。

1. Rhododendron alabamense Rehder
2. Rhododendron arborescens (Pursh) Torr.
3. Rhododendron atlanticum (Ashe) Rehder
4. Rhododendron austrinum (Small) Rehder
5. Rhododendron canescens (Michx.) Sweet
6. Rhododendron coryi Shinners
7. Rhododendron cumberlandense E. L. Braun
8. Rhododendron flammeum (Michx.) Sarg.
9. Rhododendron luteum Sweet
10. 羊踯躅　Rhododendron molle G. Don
11. Rhododendron molle (Blume) G. Don subsp. japonicum (A. Gray) K. Kron
12. Rhododendron oblongifolium (Small) Millais
13. Rhododendron occidentale (Torr. & A. Gray) A. Gray
14. Rhododendron periclymenoides (Michx.) Shinners
15. Rhododendron periclymenoides (Michx.) Shinners f. album (Aiton) C. F. Reed
16. Rhododendron prinophyllum (Small) Millais
17. Rhododendron prunifolium (Small) Millais
18. Rhododendron serrulatum (Small) Millais
19. Rhododendron viscosum (L.) Torr.