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。

• Rhododendron alabamense Rehder
• Rhododendron arborescens (Pursh) Torr.
• Rhododendron atlanticum (Ashe) Rehder
• Rhododendron austrinum (Small) Rehder
• Rhododendron canescens (Michx.) Sweet
• Rhododendron cumberlandense E. L. Braun
• Rhododendron flammeum (Michx.) Sarg.
• Rhododendron luteum Sweet
• 羊踯躅　Rhododendron molle G. Don
• Rhododendron molle (Blume) G. Don subsp. japonicum (A. Gray) K. Kron
• Rhododendron oblongifolium (Small) Millais
• Rhododendron occidentale (Torr. & A. Gray) A. Gray
• Rhododendron periclymenoides (Michx.) Shinners
• Rhododendron periclymenoides (Michx.) Shinners f. album (Aiton) C. F. Reed
• Rhododendron prinophyllum (Small) Millais
• Rhododendron prunifolium (Small) Millais
• Rhododendron viscosum (L.) Torr.