Go to National Library of New Zealand Te Puna Mātauranga o Aotearoa
Volume 52, 1920
This text is also available in PDF
(723 KB) Opens in new window
– 316 –

Summary of the Results of the Investigation.

It will be seen from the following lists that at least seven (possibly eight) of the twenty species inquirendae mentioned by Laing are still growing in the district investigated, while Riches has shown that fourteen at least were former inhabitants. Of the sixteen species excludendae four were present—viz., Hymenophyllum scabrum, Hymenophyllum ferrugineum, Trichomanes humile, Trichomanes Colensoi.

Riches informs me that a considerable patch of a small-leafed umbrella-fern (Gleichenia dicarpa?) formerly grew near the summit of the hills at the head of O'Kain's, while he has specimens of Lindsaya linearis Swartz and Lindsaya cuneata Forst. var. Lessonii Hook. f. collected somewhere in

– 317 –

this neighbourhood and sent to him by a Mr. Craig about 1880. Athyrium umbrosum and Asplenium Hookerianum var. Colensoi were both collected by Riches and are now recorded for the first time.

In the accompanying list of existing species I give unrecorded habitats for at least thirty ferns and lycopods. There is ample evidence that some species now comparatively rare were once common—e.g., Leptolepia novaezelandiae and Polystichum adiantiforme. The former I have noted in nine separate localities, and the latter in four, though no other recent investigator has recorded them at all. Adiantum affine was once common over the whole area and is still widely distributed, but is plentiful only in a few localities, such as at Waterfall Gully on Mount Bossu, Nikau-palm Gully, and the cliffs near Mat. Wight's Bay. Polystichum adiantiforme has apparently not been recorded since Raoul first mentioned Akaroa as a habitat, though Mr. Louis J. Vangioni has it growing in his fernery on a fern-trunk from Grehan Valley, where I find it still fairly common. Laing regards Raoul's record as “probably an erroneous identification,” but this species still exists in all the main Akaroa valleys, and near McDonald's, half-way up the Jubilee Road, at Wainui.

Referring to Dicksonia fibrosa, which he records from Wainui, Laing says, “As I have no specimens, I am somewhat doubtful of the identification.” This fern is common in the Le Bon's Reserve, and has been obtained near the head of Barry's Bay by Mr. E. F. Stead. Azolla rubra is a new record on my own observation.