3G2 FKKN FAMILY. 



9. Frvil-flotf separate or laterally confluent at or near the margin <\f the frond, 

 borne on ilif i">/'/.< <'/' tin I'linf, in' mi tin i //'/.s of very short side-Ktinlets : the 

 indusium iiltin'hul <ii tin- Ijnm- or //utf ami sides, (mil opening toward the mar- 

 gin of the fruitful portion of the frond. 



20. DAYAI.I.IA. Indusiuin of a single piece, flatfish or often convex and shaped 



lik.' li:ilfa gohlet cut lengthwise. F.xotic Fern-, mostly decompound. 



21. DICKSONIA.. Indu-iuni united !>y its sides with a little lobe or tooth of the 



t'rnnd, li.niiing a minute 2-lipped cup, at first nearly or quite closed, opening 

 as the spore-cases ripen. Large Ferns, native or exotic, some of the latter 

 arborescent. 



II. CYATHEACE^,or TREE FERNS: with erect and tree- 

 like stems, often many feet high. Fruit-dots round, not marginal, 

 naked, or with an involucre placed beneath the stalked spore-cases, 

 which are seated on a globose or elevated receptacle, have a some- 

 what oblique complete ring, and burst open transversely. 



22. CYATHKA. Fruit-dots on a vein or in the forking of a vein, fit first enclosed 



in a globose involucre, which opens at the top, and remains cup-shaped with 

 an entire or broken edge. 



23. ALSOl'illLA. Fruit-dots as on the last, but entirely naked, or with a rudi- 



mentary indu-ium consisting of a minute scale beneath the spore-* 

 veins free. 



III. HYMENOPHYLLACEJE, or FILMY FERNS: these 

 have very delicate and tran-lucent fronds, the short-pedicelled spore- 

 cases growing on a sl.ort or long thread-like receptacle, included in 

 a goblet-shaped or 2-lipped involucre, and furnished with a complete 

 transverse or slightly oblique ring. 



24. TIMCIIOMANKS. Fruit-clots marginal, at the end of a vein, which extends 



through the funnel-form or goble - --haped involucre, as a thread-like recepta- 

 cle bearing the spore-ca~e-; involucres sunken more or less in the frond, and 

 of the same pellucid texture. 



IV. SCHIZvEACE/E : mostly small Ferns, or else with climb 

 ing fronds. Spore-cases ovate, sessile, having a complete transverse, 

 articulated ring or cap at the apex, and opening by a longitudinal 

 slit. 



* ferns with elegnnt climbing f rands, rising from slender creeping rootstorks: spore- 



cttte&jveed by their side. 



25. LYGODITM. Pinna? or frondlets in pairs. Spore-cases covered bv imbri- 



cating -eale-like indusia in a double row on narrow lobes of the frond. 



* # Not climbing: rootstock short : fronds flustered: spore-cases fixed by their base: 



n<> indvsivm. 



2. ANT.IMI A. S]>oiv-e:i-e~ on the narrow pauicled branches of the lowest pair of 



piniijv of the 1 - :i pinnate frond, or on separate fronds. 

 27. SCIII/.KA. Spnre-ea-es in a double row <>n the narrow divisions of a pinnate 



or rarely pedate special appendage to the. simple, and linear, or fan-shaped, 



and sometimes many-forked frond. 



V. OSMUNDACEJE, or FLOWERING FERNS: rather large 

 Ferns; the spore-eases covered witli reticulated ridges, opening 

 longitudinally into two valves, and with no ring, or a mere vestige 

 of a transverse ring at the back. 



88. OSMI'N'DA. Kootstock verv thick, creeping, the growing end producing a 

 crown of tall showy frond-;. Fertile fronds or parts of fronds contracted, 

 pimmtely compound, the narrow often tlireud-like divisions densely covered 

 with nearly sessile spore-cases. 



