Horrowav.—Studies in the New Zealand Hymenophyllaceae. 597 
it occurs at high levels on the decaying trunks of Phyllocladus alpinus. 
Potts (24, p. 359) en it as occurring on the hills of Banks dre 
Canterbury, on Po 8 totara as well as on rus Doniana. 
man (7, note to plate. 235) remarks on its abundance on dead ee of 
Inbocedrus Bidwillit in the forests to the west of Mount Ruapehu, North 
Island, but states also that it has been found in the South Island on Podo- 
ине large granite boulders on Mount Hope, in the Nelson noa and 
station on rocks on the forest-covered summit of Mount Parapara (Nelson 
District), Libocedrus — present near by with H. Malingii upon it. The 
distribution of this species remains, therefore, rather a puzzle. In districts 
be rtain 
other conifers, but when the Libocedrus is abundant, as in Westland, it is 
apparently confined to tad tree, although the others are present alongside. 
Other species of Hymenophyllum are higher epiphytes than H. Malingii, 
and occupy more exposed positions, but none of these, except possibly 
H. dilatatum, H. scabrum, and Т. reniforme, shows any anatomical modifi- 
cation of the frond in iD dance with its station. On the other hand, 
the frond of H. Malingii is modified to an extreme extent, so that in this 
respect it is probably the most remarkable member of the family. It will 
be sufficient to state briefly that the frond has no a - lamina com- 
parable to that of other species The vascular bundle in all parts of the 
frond is encircled by thick-walled tissue showing сана in the cell-walls, 
the outermost limiting layer being thin-walled and protruding as long 
cylindrical papillae. These latter contain chlorophyll, and function as 
the assimilatory tissue. The papillae are separated from one another by 
cavities of the hairs are filled—a nie peli but rarely to be observed— 
that the underlying green colour of the chlorophyll tissue can be seen 
Trichomanes strictum (Plate 74) is one of the two tufted New Zealand 
species of Tric. homanes, the other being T. elongatum (Plate 75). The 
th 
secluded places in the forest. Т. elongatum ез the actual banks of 
small watercourses, although not Мана to them. Other writers have 
drawn attention to the shade-loving habit of this species. In this respect, 
