Victorian Plants. 525 



2185. Frond-segments minutely denticulated. 



Always very dwarf, here often on the trunks of fern-trees ; 

 root-stock extremely thin, creeping ; stalks thinly filiform 

 throughout ; fronds almost completely pinnate, shining ; 

 segments partly decurrent, deeply divided into elliptic- or 

 broad-linear blunt lobes, the denticles very acute, rather 

 unequal ; fruit-masses mostly axillary, towards their base 

 innate, the two segments of the fruit-cover orbicular- 

 obovate, denticulated. H. Tunbridgense. 



Frond-segments without any denticulation ... ... 2186 



2186. Stalk filiform throughout. 



Dwarf, often on the trunks of fern-trees ; root-stock creeping, 

 thinly filiform ; stems capillaceous ; fronds from deltoid 

 to lanceolar-rhomboid in outline, usually quite small, but 

 occasionally rather elongated, simply or doubly pinnate 

 but imperfectly so, shining and bright-green on both sides ; 

 pinnas somewhat decurrent ; lobes of the segments from 

 elliptic- to broad-linear, blunt, partly confluent ; segments 

 of fruit-covers nearly orbicular. Figure 134. 



H, niteus. 



Stalk upwards membranously dilated. 



Dwarf, often on trunks of fern-trees ; root-stock creeping, 

 thinly filiform ; fronds somewhat deltoid in outline, im- 

 perfectly bi- or even tri-pinnate when well-developed, 

 occasionally more elongated, often crisped ; lobes of the 

 segments somewhat decurrent, from elliptic- to broadish- 

 linear, mostly short, blunt; fruit-masses generally ter- 

 minal ; segments of the fruit-covers nearly orbicular. 



H. Javaiiicum. 



TRXCHOXKANES. 



2187. Fronds imperfectly pinnate. 



Quite dwarf, chiefly on trunks of fern-trees, sometimes 

 forming large patches ; fronds on almost capillary stalks, 

 conspicuously and closely venular-streaked, very shining ; 

 lower segments from broad-linear to narrow-elliptical, 

 entire or indented or incised, but without distinct denticu- 

 lation, almost or quite sessile on the thus far very thin 

 rhachis ; upper segments confluent, the terminal one 

 elongated ; fruit-masses axillary ; tube of the fruit-cover 

 much innate, dilated at the summit ; setular axis of the 

 fruit-masses long-exserted. Figure 133. 



T. venosnm. 



