noun
silverthorn; thorny elaeagnus; thorny olive
A species of oleaster (Elaeagnus pungens), an evergreen shrub native to East Asia, often used in hedges and for its fragrant flowers and edible fruit.
庭にナワシログミを植えた。
I planted a silverthorn in the garden.
ナワシログミの実は食べられる。
The fruit of the silverthorn is edible.
グミ is a general term for oleaster or silverberry species, while ナワシログミ specifically refers to Elaeagnus pungens.
The name ナワシログミ likely derives from 苗代 (なわしろ, rice nursery) and 茱萸 (ぐみ, oleaster), but the exact origin is uncertain.