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Rhododendron sect. Tsutsusi
''Rhododendron'' section ''Tsutsusi'' (spelled ''Tsutsuji'' in some older texts) was a subgenus of the genus ''Rhododendron'', commonly referred to as the evergreen azaleas.〔〔〔 In 2005 it was reduced to a section of subgenus ''Azaleastrum''.〔 Containing 80 - 117 species, it includes both deciduous and evergreen types and is distributed in Japan, China and northeastern Asia. They are of high cultural importance to the Japanese. Among the species in this genus lie the largest flowering azaleas.
== Description ==
Tsutsusi are characterised by the presence of terminal buds that contain both floral and vegetative shoots. Many also have flattened multicellular ferrugineous (rust coloured) hairs, which can cover the leaves and stems providing a coppery appearance, or pseudoverticillate leaves that are rhombic in shape. However some have hairs confined to the axils, or base of floral buds.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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