CATALOGUE OE EERNS. 
51 
i 
72. CETERACH, Willd. ; J. Sm. 
(Asplenii sp., Linn. Grammitis, Sw.) 
Vernation fasciculate, erect, caespitose. Fronds 2-12 inches 
long, sinuose-pinnatifid or pinnate, the under side densely squa- 
mose. Veins forked, anastomosing. Sporangia unilateral, pro- 
truding through the dense squamae, forming oblong sori. Indu- 
siurn obsolete. 
1. G. officinarum, Willd.; Hook. Gen. Fit. 1. 113; Lindl. and 
Moore's Brit. Ferns , t. 43 A. Asplenium Ceterach, Linn. 
Grammitis Ceterach, Sw. ; Schk. Fit. t. 7 B ; Lodd. Bot. 
Cab. t. 15. Scolopendrium Ceterach, Fng. Bot. 1244. — 
Europe, North India. 
Tbibe V. ASPXBXEJE, J. Sm. 
Sori round, rarely oblong, intramarginal, furnished with an 
orbicular, reniform, cucullate, or calyciform indusium. 
73. HYPODERRIS, B. Br. 
Vernation uniserial, subsarmentose. Fronds simple entire or 
trilobed. Primary veins costaeform ; venules compound anasto- 
mosing. Sporangia compital, included within a calyciform, ob- 
scure, membranous indusium. Sori round, irregular or oblique, 
biserial, between the primary veins. 
1. FI. Brownii, J. Sm. ; Hook. Gen. Fit. t. 1. Woodsia 
Brownii, Metten . — Trinidad and Guiana. 
74. ASPXDZUM, Sw. (in part) ; Schott. 
(Sagenia, Presl. Bathium, Fee.) 
Vernation fasciculate, erect. Fronds 1-4 feet high, simple 
entire or lobed, pinnate, bipinnatifid, or bipinnate. Veins costae- 
form ; venules compound anastomosing. Sporangia compital, 
or on the apex of free veinlets terminating in the areoles. Sori 
round. Indusium orbicular or reniform. 
