1946 CLVI. FILICES. [Hymenophyllum . 



Lobes of the fronds neither bordered nor toothed. 

 Stipes filiform not winged. 



Frond bipinnate, with pinnatifld pinnules 1- ■'^- flabellatum. 



Stipes winged. Frond bipinijate 2. H. javanicum. 



Lobes of the fronds minutely often sparsely, serrulate. 

 Fronds bipinnate, with divided pinnules, usually 2in. long or more. 



Sori lateral near the base of the pinnules •• . 3. H. tunhridgenie. 



Fronds 3 to 5in. long, stipes short, lobes linear, with entire margins. 

 Sort supra-axillary, deeply sunk on the lobe. Valves entire, 

 reoeptaole always exserted i. H. trichomanoides. 



1. H. flabellatum (fan -shaped), Labill. PL Nov. Holl. ii. 101, t. 250; 

 Benth. Fl. Austr. vii. 705. Fronds ovate or lanceolate in outline, sometimes 

 broad and under 2in. long, more frequently elongated to 3 to 8in., twice or thrice 

 pinnatifld, the lower segments or pinnffi distant, the rhachis as well as the stipes 

 filiform and not winged, the upper smaller ones confluent with the narro^yly- 

 winged rhachis, the lobes not dentate. Sori lateral or terminating the smaller 

 lobes. Indusium orbicular or rather broader than long, about | line diameter, 

 deeply divided into entire valves. — Hook. Spec. Filic. i. Ill ; Hook, and Bak. 

 Syn. Filic. 61 ; Hook. f. Fl. Tasm. ii. 134 ; H. nitens, R. Br. Prod. 159 ; Hook, 

 and Grev. Ic. Filic. t. 197 ; Bail. Litho. Ferns Ql. 30. 



Hab.: Southern localities. 

 Also in N»w Zealand. 



2. H. javanicum (of Java), Spreng.; Hook. Spec. Filic. i. 106, Syn. Filic. 

 60; Benth. Fl. Aicstr. vii. 705. Fronds ovate or lanceolate in outline, 3 to 4in. 

 long, twice or thrice pinnatifld, the rhachis winged and the narrow wings 

 continued down the stipes ; segments and lobes linear-oblong, obtuse, not 

 dentate. Sori on a short lateral lobe. Indusium ovate, about ^ line long, divided 

 nearly to the base into entire valves. — H. flabellatum, R. Br. Prod. 159, not of 

 Labill.; H. crispatum, Wall.; Hook. f. Fl. Tasm. ii. 134 ; H. demissum, F. v. M. 

 Fragm. v. 116, not of Swartz.; Bail. Litho. Ferns Ql. 31. 



Hab.: Southern localities and northwards to Bellendsn Ker Bange. 

 Also in East India, the Malayan Archipelago and New Zealand. 



3. H. tumbridgense (of Tunbridge), Sm.; Hook. Spec. Filic. i. 95, Brit, 

 ierns, t. 43, Syn. Filic. 67 ; Benth. Fl. Austr. vii. 706. — Rhizome filiform, much 

 branched with numerous fronds, forming broad densely matted almost moss-like 

 patches. Frond on a filiform stipes, lanceolate in outline, pinnate, rarely above 

 2 or Bin. long; the pinneea deeply divided into 8 to 8 linear lobes minutely 

 denticulate on the margin. Sori sessile or on a very short lobe, solitary on the 

 base of the pinnse on their upper margin. Indusium ovate or orbicular, about 

 1 line diameter, divided to much below the middle into more or less denticulate 

 valves.— R. Br. Prod. 159 ; Hook. f. Fl. Tasm. ii. 153 ; F. v. M. Fragm. v. 116 ; 

 Bedd. Ferns S. Ind. t. 265 ; H. cupressiforme, Labill. PI. Nov. Holl. ii. 102, t. 

 250 ; Bail. Litho. Ferns Ql. 80. 



Hab.: Mount Lindsay and other southern localities. 



The species is widely spread over more temperate and cooler regions of the globe. 



Var. exsertum, Bail. Brd Suppl. Syn. Ql. Fl. 90. The Bristle-bearing Filmy Fern. This 

 form differs in having a long bristle-like exserted receptacle ; the indusium also was longer than 

 usual. The receptacle is also exserted in the Lord Howe's Island specimens of this fern, but 

 there the plant is of much coarser growth. — Bail. Litho. Fern Ql. 30. 



Hab.: Summit of Bellenden-Ker. 



4. H. trichomanoides (Trichomanes-like), Bail. 8rrf Suppl. Syn. Ql. Fl. 90. 

 Rhizome nearly or quite glabrous, filiform, creeping up the stems of trees' in long 

 strings, seldom if ever forming matted patches on old damp logs. Fronds 



