CATALOGUE OP EERNS. 
69 
; 2. T. radicans, Sw. ; Lindl. and Moore's Brit . Ferns , t. 48. 
Trichomanes speciosum, Willd. T. pyxidiferum, Huds. 
(non Linn.) T. brevisetum, R. Br. T. alatum, HooJc . in 
FI. Bond. t. 53 (non Sw.). T. Europseum, Sm. in Rees' 
Cyclop. T. Hibernicum, Spreng. T. Andrewsii, Newm. 
Hymenophyllum alatum, Sm. Fng. Bot. t. 1417. — Tro- 
pics and temperate regions of the northern hemisphere. 
3. T. crispum, Linn. ; Blum. Fil. t. 86 ; HooJc. et Girev. Ic. 
Fil. t. 12. — Tropical America. 
101. HYMENOPHYLLUM, Sm. 
Vernation uniserial and sarmentose. Fronds varying from 
simple to decompound-multifid, membranaceous and pellucid, 
smooth, or bearing simple, forked, or stellate hairs. Veins sim- 
ple or forked, free. Sori terminal. Indusium short, urceolate, 
bilabiate or bivalved ; receptacle short, included within the indu- 
sium. 
1. H. Tunbridgense, Sm. Fng. Bot. t. 162 ; SchJc. Fil. t. 
135 L>. ; Lindl . and Moore's Brit. Ferns , t. 49 A. H. 
cupressiforme, Labill. Nov. Holt. t. 250. f. 2. — Temperate 
regions of both hemispheres. 
2. H. unilaterale, Willd. ; Lindl. and Moore's Brit. Ferns , 
t. 49 B. II. Wilsoni, HooJc.; Fng. Bot. t. 2686. — Tem- 
perate regions of both hemispheres. 
3. H. dilatatum, Sw. ; SchJc. Fil. t. 135 ; HooJc. et Girev. Ic. 
Fil. t. 60. — New Zealand. 
Sect. IV. DICKSONIEZE, J. Sm. 
Sporangiferous receptacles terminal, punctiform, marginal. 
Special and accessory indusia conniving, forming an urceolate or 
bivalved, reflexed cyst, including the sporangia. 
102. SITOLOBIUM, Lesv. 
(Dicksonise sp., Auct.) 
Vernation uniserial and sarmentose. Fronds bi-tripinnatifid, 
