grass mixed with mud for wall construction
Archaic term for a traditional building material; not used in modern Japanese.
In old houses, walls were made with mud mixed with wall grass.
Hedera rhombea (species of ivy)
Archaic name for a specific ivy species; modern Japanese uses 木蔦 (きづた) or other terms.
See also: キヅタ
In old texts, 壁草 sometimes refers to a type of ivy, Hedera rhombea.
Compound of 壁 (wall) and 草 (grass). The exact historical derivation is uncertain; the word is now archaic.