*1:See eg. 小黒晃「ハーデンベルギア」https://www.shuminoengei.jp/m-pc/a-page_p_detail/target_plant_code-344 「ハーデンベルギア」https://garden-vision.net/flower/hagyo/hardenbergia.html
*2:See also https://sumita-m.hatenadiary.com/entry/2020/09/08/103629 https://sumita-m.hatenadiary.com/entry/2021/11/02/082756 https://sumita-m.hatenadiary.com/entry/2021/11/07/092402 https://sumita-m.hatenadiary.com/entry/2021/11/09/153709 https://sumita-m.hatenadiary.com/entry/2021/11/11/090459 https://sumita-m.hatenadiary.com/entry/2022/03/26/043722
