Hijmenophyllum] I. — filices. 37 



and the Thames goldfields, and always above 500 ft. elevation. In 

 the South Island, on rocks on the Upper Waimakariri, Bealey, 

 Arthur's Pass, and several other localities on the Canterbury Alps ; 

 while on the "West Coast it occurs at Okarita (the most southern 

 locality yet recorded) and Hokitika ; its range is from sea-level to 

 4,000. 



To this species must apparently be united H. armstrongii, Kirk 

 (Trichomanes armstrongii. Baker), which is only to be distinguished — 

 -according to Mr. Kirk — by its firmer texture and stout marginal 

 nerve, both of them characters which do not appear to be always 

 ■constant. A figure of this appears in "N.Z, Inst. Trans.," vol. x. 

 ,p. 394. 



4. H. bivalve, iiwartz. 



A matted, glabrous species, with stout, wiry, creeping rhizome. 

 .Stipes %\. in. long, wiry, naked. Frond 3-8 in. long, dark-green, 

 broadly-ovate or triangular, 2- or 3-pin.natifid ; mam rachis slightly 

 winged above ; secondary rachis winged throughout ; lower pinnte 

 triangular, acuminate ; ultimate segments linear, deeply toothed. 

 Sori very numei-ous, terminal ; involucre broadly ovate or subor- 

 bicular, entire, divided nearly to the base, which is sunk in the 

 frond ; receptacle always included. 



Synonyms. — H. spathulatum. Col. ; H. pjrriforme, F. den Bosch ; 

 Trichomanes bivalve, Forst. ; T. pacificum, Hedw. 



Distribution. — Confined to N.Z. and the Chatham Islands. 



In the S. Island this sjDecies is common in the bush, ranging in 

 Otago from sea-level up to 3,000 ft. In the N. Island it occurs 

 ■commonly along the S. and E. Coasts, and in the hilly districts of 

 the iuterior, but appears always to occur at considerable elevations, 

 .2,000 ft. being about the average level. Thus at the Thames it has 

 been gathered at 1,500-1,900 ft., on Pirongia at 2,700 ft. and Mt. 

 Tarawera at 3,000 ft. At Cape Colville, according to Mr. Kirk, it 

 ■does not occur below 2,000 ft. Apparently it has never been 

 gathered about Auckland, or on the peninsula to the N. of it. 



This is one of the most water-loving species of the genus, being 

 frequently found — and ia the greatest luxuriance — in the drip of a 

 waterfall or on the rocky banks of forest streams. This fact is worth 

 remembering in cultivating it. 



5. H. multifidum, Swarts. 



A matted glabrous species. Stipes 2-4 in. long, wiry, naked. 

 Fronds 2-6 in. long, ovate-lanceolate, tri-pinnatifid ; rachis hardly 

 winged above ; pinnse broadly lanceolate ; ultimate segments linear, 

 very sharply toothed. Sori rather numerous, terminal on the lateral 

 segments of the upper piiinje ; iavolucre quite free, obovate, tubular 

 below ; valves divided not more than half-way down, lips entire ; 

 receptacle often exserted. 



