Hideaki Ohba, Shinobu Akiyama and Gerard Thijsse
Miquel cited only one specimen collected by Keiske. The specimen has the label indicating to be collected by Siebold, and also a label of Japanese paper. It is considered to be collected by Keiske and pass to Siebold.
Miquel cited two specimens as to be collected by Japanese botanists, but the labels on the specimens are indicating to be collected by Siebold.
The specimen, Thunberg s.n., [899. 69-163] (L 0144377), is also the type of Sambucus sieboldiana var. stenophylla Nakai (Caprifoliac. Jap.: 11, 1921).