Trichomanr^.] CLVI. FILICES. 1945 



22. T. rigidum (rigid), Swartz.; Hook. Spec. Filic. i. 138 ; Syn. Filic. 86 ; 

 Be7ith. Fl. Aiistr. vii. 702. Rhizome short and thick. Fronds ovate-lanceolate 

 or triangular in outline, 3 to 6in. long, 1^ to Sin. broad at the base, dark and 

 almost coriaceous, bipinnate, with deeply pinnatifid lanceolate pinnules and linear 

 dentate segments, the primary and secondary rhachis winged only towards the 

 end. Indusia partially embedded in the lower inner teeth or lobes of the tertiary 

 segments, or sometimes wholly free without any winged margins, narrow, with a 

 small spreading entire border. Eeceptacle exserted. — Bedd. Perns 8. Ind. t. 8 ; 

 F. V. M. Fragm. v. 115 ; Bail. Litho. Ferns Ql. 25. 



Hab.: In all coastal scrubs. 



Very widely spread over the tropical regions of the New and Old World. 



Var. laxum. Bail. Bot. Bull. iv. Ehizome short, thick and erect. Fronds 2 or Sin. long, on 

 Blender stipes of 1 to IJin., almost linear-lanceolate in outline, Pinnie distant. Indusia small, 

 receptacle long-exserted as in the normal form.— Saii, Litho. Ferns, Ql. 25. 



Hab,: Near Herberton and other localities. 



This small form is often met with in Queensland, growing with the common form, but always 

 seems quite distinct enough to be given as a named variety. 



28. T. johnstonense (of the Johnstone Eiver), Bail., Proc. Boy. Soc. Ql. i. 

 Rhizome long, creeping, rigid, knotted, clothed with black bristle-like scales. 

 Stipes somewhat angular, scarcely winged, 2 to 4in. long, ol a dingy-brown 

 colour, the immediate base scaly, as the rhizome. Fronds bipinnate, with 

 deeply pinnatifid or bipinnate pinnules, 3 to 6in. long, IJ to 4|in. broad, the 

 rhachis slightly winged, the linear segments very narrow and 1-nerved. Indusia 

 few on the lower lateral segments of the pinnule, free, erect, much tapering 

 towards the base, the orifice 2-lipped. Receptacle exserted, usually long. — Bail. 

 Litho. Ferns Ql. 26. 



Hab.: Johnstone River and other tropical localities. 



24. T. maximuin (largest), Bliime, Filic. Javan. Rhizome stout, creeping. 

 Stipes strong, erect, 3 to 6in. long. Frond 12 to 18in. long, 6 to 9in. broad, 

 ovate, quadripinnatifid ; pinnsB erecto-patent, ovate-lanceolate, the largest 4 to 

 6in. long, 2in. broad ; pinnules lanceolate-deltoid, lin. or more long, out down to 

 the rhachis into segments, which are again deeply pinnatifid ; ultimate segments 

 IJ to 2 lines long, slightly flattened, texture subrigid, surface naked, dark-green ; 

 a central costa only in each segment, Indusia 2 to 8 to a pinnule ; cylindric, 

 the mouth dilated but not 2-lipped.— Syn. Filic. 86. 



Hab.: Given as a Queensland plant in Muell. 2nd Syst. Cens. Austc. PI, 330. 

 I have never seen Queensland specimens of this species. 



13. HYMENOPHYLLUM, 8m. 



(Membranous leaf.) 



Rhizome slender, creeping, often much branched anil matted. Fronds usually 

 small, erect, of a delicate membranous half-pellucid texture, variously divided, 

 the lobes usually linear 1-nerved. Sori terminal or lateral, Indusium of the 

 texture of the frond and continuous with it, more or less cup-shaped at the base, 

 and immersed in the margin of the frond, the exserted portion deeply divided 

 into 2 broad lobes or valves. Eeceptacle oblong or linear, shorter than the 

 indusium or rarely rather longer. Spore-cases sessile at or near its base. 



A large genus, generally dispersed over most tropical and temperate regions of the globn, 

 especially in America. In the northern hemisphere limited to America and the western parts 

 of the Old World, always frequenting shady situations, with a moist atmosphere, — Btnth. 



