New Zealand Map Series 1:
S146 (WGS84 -45.353308 170.712435)
Habitat:
Shingle ballast of railway.
Notes:
(=Sisymbrium thaliana (L.) Gay). Recorded as Sisymbrium thaliana Hk.f. by Thomson (N.Z.J.Sci. 2.12:1885:574). But I can find no specimens. [Imperial Grid: Unknown]. Sheets A to C.