xi 
H H Fronds dimorphous, the Sterile divarfed, Sessile, querci/orm. 
(a) Fertile and Sterile Segments of the noj'mal f ronds vMiform. 
38 DilYNARIA, (Bory. 1825,) Sm. 1841. 
§ 16. ASPIDIEiE. 
[A] Indusia orhicular, peltatehj affixed. 
* Veins reticulated, tvithfree included veinlets. 
f Veins compoundly anastoynosing, ivith inchuled divaricate free veinlets. 
39 ASPIDIUM, Siv. 1800, (reduct) : Schott, 1834. 
Batlimium, Presl. 1836 : Link, 1841. I Proferea, Presl. 1849. 
I Podopeltis, Fee, 1851. 
t t Veins angularly anastomosing, ivith 1-3 excurrent veinlets in the areole-s, {sometimes the upper venules only anasto- 
mosing.) 
40 CYRTOMIUM, Presl. 1836. 
Phanerophlebia, Presl. 1836. 
Amblia, Presl. 1836. 
Veins free. 
41 POLYSTICHUM, Roth, 1788, (reduct), Schott, 1834. 
Hemigonium, J. Sm. 1841. 
Cyclopeltis, J. Sm. 1846. 
Peltochlaena, Fee, 1851. 
Hemicardion, Fee, 1851. 
Aspidium, Sw. (pt.) 1800. 
Sectaria, Cav. (pt.) 1802. 
Hypopeltis, Eich. 1803. 
Rumohra, Eaddi, 1825. 
[1^] Indusium reniform, affixed at tlic sinus. 
* Veins reticulated. 
t Fronds monomorphous, or conformable. 
% Veins compoundly anastomosing, often with free included divaricate veinlets in the areoles. 
42 SAGENIA, Presl. 1863. 
Polydictyum, Presl. 1849. | Loboclilaena, Fee, 1851. 
Microbrochis, Presl. 1849. ' | Phlebiogonium, Fee, 1851. 
Cardioclilaena, F^e, 1851. j 
t X Veins arcuately anastomosing, forming elongated costal areoles, the marginal ones free. 
43 PLEOCNEMIA, Presl. 1836. 
Haplodictyum, 1849. 
* * Veins conniveyitly anastomosing. 
44 NEPHRODIUM, Hich. 1803 (restrict) : Schott 1834. 
Arsenopteris, Webb et Berth, (pt.) 1847 
Plectoclilaena, F^e, 1851. 
* * * 
Aspidium, Sw. (pt.) 1800. 
Cyclosorus, Link, 1841. 
Abacopteris, Ft^e, 1843. 
Pronephrium, Presl. 1849, 
Veins free. 
t Veins simple or pinnate, the loxver anterior venule {sometimes more) soriferovs. 
