L E U C O S T E G IA . Presl.
Sori globosi, magni, infra marginales. Indusium orbiculari-reniforme, p uncto la te ra
li basilari affixum, planum, candide scariosum, impresso-punctulatum. Receptaculum
punctiforme, minutum F ilix Nepalensis. Rhizoma repens. Frondes
sparsoe, herbaceoe, pinnatim decompositæ, pagina superiore pallidiore fa c iem paginæ
inferioris reliquarum Filicacearum pi-oeseferente, inferiore intensius viridi nitidiore
faciem superiorem referente, p innis petiolatis, pinnulis sessilibus ovatis obtusis basi
inæquilatera acutis, inferioribus inciso-pinnatifidis, superioribus laciniisque obtuse
inoequaliter dentatis. Venæ pinnatæ internoe, venulisque apice clavato libero desi-
nenles, infimæ furcatæ, venula superiori apice fructifera. Presl.
Leucostegia immersa. Presl. ( T a b . L I I . )— Davallia immersa. Wall.
F ig. 1. Under-side of a pinnule with sori ; f . 2. Upper side of do. ; f . 3. Portion of a pinnule with
a sorus ; f 4. Sorus, with the indusium forced open ; f . 6. Sporangia ; / 6. Sporules :—magnified.
T A B . L I I . B.
C Y S T O P T E R IS . ■ SeniA.
Sori globosi, dorsi medio venularum insidentes. Indusium subhemisphæricum sæpe
acuminatum, p u n c to sublaterali inferiore affixum, laxe cellulosum, nonnunquam
s erratum, demum reflexum e t marcescens.— YiWces pleræque extratropicæ. F ro n d
e s /ascícwfate, herbaceoe, varie pinnatim divisæ. Venæ inferiores pinnatæ, superiores
simplices; venulæ internoe ante marginem evanescentes.
Cystopteris fra g ilis . Bernh. ( T a b . L U . B.) Cystea. Sm,
Fig. 1. Under-side of a pinnule with sori ; / . 2. Portion of a pinnule, with a single sorus ; / , 3.
Sorus, with the indusium roflexcd i f . 4, Inner view of an involucre i f . 5, 6. Sporangia i f 7. Sporules ;
— magnified.
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