Flora of New Zealand Series

H. semibivalve Hook. et Grev. Icon. Fil. 1829, t. 83.

H. imbricatum Col. in Tasm. J. nat. Sci. 2, 1846, 187.

Mecodium rarum (R. Br.) Cop. loc. cit. 67, 1938, 21.

Rhizome filiform, glabrate; stipites rather distant to crowded. Stipes filiform, glab., wingless, 3-4 cm. long. Rhachis winged above or throughout. Lamina pale green, pellucid, narrow-oblong, 3-15 cm. long, 2-pinnatifid to 2-pinnate; final segs linear, obtuse. Sori mainly in upper part of frond, immersed. Indusium 1-2 mm. long, rhomboid to suborbicular, 2-valved to halfway, valves rounded. Receptacle not exserted.

DIST.: N., S., St., Ch., A., C. Lowland to montane forests from lat. 35º southwards. Also in Australia.

Colenso's H. imbricatum "on edges of rocky precipices, in dry spots overhanging water at Pataua, near Whangarei" appears to be a stunted form.