327 
2. Segmentorum lobi apice obtusi vel rotundati. 
y Lobi simplieiter serrati vel lobulis omnibus integris praediti. 
Öystopteris depressa Gdgr. Petiolis viridi-fulvis; folum 8— 
10 em. altum, 2 mm. latum, ambitu anguste oblongum, sensim eon- 
traetum; segmentis patulis, ambitu oblongo-obtusis, nervis fulvis; 
lobis obovatis, subobtusis, basi dilatatis, margine dentibus ovato- 
elliptieis, acuto-mucronatis ornatis. 
Hab. Gallia, Loire in rupibus supra Pelussin, 2500 ped. 
(Gdgr.). 
Species humilis, depressa, foliis angustioribus, segmentorum 
lobis acute serratis praesertim conspicua. 
Oystopteris umbratica Gdgr. Petiolis fulvo-rnbentihus; folium 
18—22 cm. altum, 3 cm. latum, ambitu oblongum, superne longe 
acuminatum; segmentis sat erectis, ambitu oblongo - subacuminatis, 
nervis minutissimis, albidis; lobis obovato-obtusiusceulis, basi valde 
dilatata, dentibus eorum inaequalibus, triangulari-acutis. 
Hab. Gallia, in fissuris rupium umbr. ad Sauvain, Loire, loco 
dieto Chorsin, alt. 3200 ped. ubi abunde ipse legi. 
Folium antecedente intensius. virens; fructificationes densiores, 
segmentorum acuminatorum nervi tenuiores. 
COystopteris consanguinea Gdgr. Petiolis fusco-rubentibus; fo- 
lium 28—30 cm. altum, 5 cm. latum, ambitu oblongum, apice sen- 
sim acuminatum, segmentis sat erectis, ambitu late oblongis, sensim 
acuminatis, nervis prominulis, virescentibus; lobis obovatis, obtusis, 
basi dilatata, dentibus eorum inaequis, triangulari-cuspidatis. 
Hab. Gallia in monte Semioure prope Chatelneuf, Loire, 
1100 ped. (Gdgr.). 
Praecedente paulo major, nervi magis prominuh. 
Cystopteris amoenifolia Gdgr. Petiolis basi tantum fulvo- 
rubentibus; folium 18—20 cm. altum, 4—4'/, cm. latum, ambitu 
oblongum, apice abrupte satque acuminatum; segmentis patulis, am- 
bitu oblongo-triangularibus, acutiusculis, nervis prominulis, minus 
albidisque; lobis obovato-oblongis, basi angustissima, dentibus eorum 
magnis, obtusis, late ovato-ellipticis. 
Hab. Austr. super. ad Aistershaim (K. Keck). 
Gracilis, amoene virens; lobi antecedentibus magis dentati, den- 
tibus profundis, obtusis; folium inferne interrupte pinnatum. 
Öystopteris lucescens Gdgr. Petiolis usque ad segmeuta amoene 
fulvo-brunneis; folium 14—17 cm. altum, 4 cm. latum, ambitu ob- 
longum in apicem abrupte longeque acuminatum; segmentis horizon- 
talibus, ambitu late obovato-oblongis, superne vix acutis, nervis ni- 
tide albescentibus; lobis basi dilatatis, late obovato-oblongis, dentibus 
obovato-acutis, saepius in apicem bifidis. 
Hab. Anglia, Twel Dü, Carnarvonshire (J. Harbord 
Lewis). 
Petiolus inferne rufus, apice versus segmenta nitide albidus; 
dens loborum conspicue obovata, superne saepius minute bifida. 
