Flora of New Zealand Series

B. cicutarium var. dissectum Hook. f. Handbk N.Z. Fl. 1864, 387.

A more slender plant, with the ultimate pinnules dissected into narrow-linear lobes. More local in its occurrences.

B. biforme Col. in T.N.Z.I. 18, 1886, 223, was described from plants collected by H. Hill "in swamps near Tahoraiti". Colenso says: "It usually bears two sterile and sometimes two fertile fronds". The laminae are dissected as in var. millefolium.

Forms intermediate between the sp. and its var. occur, and hybridism has been suggested as a part explanation. Detailed comparison of N.Z. forms with those of Australia, Tasmania and S. America has not been made.