328 
Oystopteris islandica Gdgr. Petiolis omnino pallide flavo- 
virescentibus; folium 15—16 cm. altum, 2'/, em. latum, ambitu 
angustissime oblongum, in apicem sensim acuminatum; segmentis 
sat erectis, ambitu obovato-obloneis, dentibus integris, breviter ovato- 
acutiusculis. 
Hab. Islandia, in saxosis frigidis ad Reykiavik, Klofa Jökul 
(Krabbe). 
Folium inferne valde interrupte pinnatum, gracile, flexuosum; 
segmenta suberecta nec patula. 
Cystopteris pyenoloba Gädgr. Petiolis basi nitide fusco-brun- 
neis, apice pallidis; folium 25 cm. altum, 5'/, em. latum, ambitu 
late oblongum, superne sensim longeque acuminatum; segmentis 
rectis, ambitu late oblongis, sensim acutis, minute nervoso-albidis: 
lobis obovatis, basi sat dilatata, dentibus obovatis, integris, pro- 
fundis, obtusis, media parte linea alba translucente notatis. 
Hab. Gallia, in saxosis alpinis Delphinatus (Gdgr.) 
A praecedentibus lobis, condensatis, margine profunde dentatis 
potiusque laciniatis, serraturis albo-lineatis, optime diversa. 
Oystopteris Schultziana Gdgr. Petiolis usque ad segmenta 
subfusco-rubentibus; folium 20 cm. altum, 3'/, em. latum, ambitu 
oblongum, in apicem longum abrupte acuminatis; segmentis sub- 
rectis, ambitu oblongo-subacutis, nervis virescentibus, minutis; lobis 
obovatis, basi sat contractis, dentibus ovato-elliptieis, obtusiuseulis. 
Hab. Palatinatus, in fissuris rupium umbrosorum (Schultz bip.). 
Ab antecedente differt lobis multo brevius dentatis, laxioribusque, 
folio apice longius acuminato, segmentis paulo magis patulis ete. 
Cystopteris caucasica Gdgr. Petiolis omnino intense fuscis; 
folium 15 —16 cm. altum, 4 cm. latum, ambitu oblongum, superne 
sensim longeque acuminatum; segmentis valde patulis, ambitu ob- 
longis, sensim subacutis, nervis pallidis vix perspicuis; lobis obovato- 
oblongis, basi abrupte truncato-acutis, dentibus triangulari-acutis. 
Hab. Caucasus orient., in alpinis Daghestaniae (Becker). 
Folia a rhizomate pluria, flexuosa; lobi inferiores sublobulati 
tune undulato-subdentieulati, apice acutiuscul. 
Tr Loborum serraturae dentieulatae lobulisve 3—4-dentatis. 
Öystopteris nivalis Gdgr. Petiolis omnino virescentibus; folium 
30 em. altum, 6'/, cm. latum, ambitu oblongum, superne longe con- 
tractum; segmentis subpatulis, oblongis, apice parum breviterque 
attenuatis, nervis prominulis, brunneis; lobis late obovato-oblongis, 
basi valde dilatata, lobulis ovato-ellipticis, obtusis, apice saepe sae- 
pius latiuseule tridentato-acutis. 
Hab. Islandia, in saxosis frigidis ad Klofa Jökul et prope 
Reykiavik (Krabbe). 
Species robusta, flexuosa, amoene virens; lobi valde minuteque 
nervosi. 
(Fortsetzung folgt.) 
—n 
