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TAB. XXV.
C IB O T IU M . Kmdf. Presl (ex parte).
PiNONiA. Gaudich.
Sori clepresso-globosi, iiitvamarginales, ad apicem venularum. Indusium bivalve,
coriaceum, durum, valvis inæqualibiis (interiore minore) v. subæqualibus. Receptaculum
parvum, convexum Filices tropico-Americanæ v. ex Insulis Sandvicensihus,
caudice in unica specie (C. Cliamissoi) arboreo, plerumque rhizomate globoso.
F rondes amploe, speciosa:, rigidæ, dccomposito-pinnatæ, subtus sæpe glaucæ. Venæ
pinnatæ, simplices furcatoeve.
Cibotium Schiedii. Schiecht. in Linnoea, v. b . p . 616.
T h e th ic k a n d h o rn y in d u s ia ( to g e th e r w ith a v e ry r ig id a n d p e c u lia r h a b it) , s e p a r a te
Cibotium from Dic liso n ia . I t s g e n e ric d is tin c tio n from B a la n tium ( a lr e a d y g iv en a t T a b .
X X . ) , th o u g h th e tw o g e n e ra a re p la c e d w id e ly a p a r t b y P r e s l, is o f a m e r e d u b io u s
c h a ra c te r , d e p e n d in g , as i t d o e s, a lm o s t w h o lly on th e d is s im ila r n a tu r e o f th e o u te r an d
in n e r v a lv e s o f th e in d u sium in B a la n tium , th e e x te r io r o n e b e in g g r e e n a n d h e rb a c e o u s ,
in o th e r w o rd s , fo rm e d b y a lo b u le o f th e m a rg in o f th e f ro n d ; b u t in B . S e llow ia n um ,
P r e s l , th e r e is s c a rc e ly a n y d iffe ren c e in th e c o lo u r a n d t e x tu r e o f th e tw o v a lv e s . P r e s l
re f e r s to h is G e n u s C ibotium, C. g la u cum , H o o k , e t A r n . {D ic k so n ia g la u ca , Sm ., C . Ch a -
missoi, K a u lf., P in o n ia splendens, G a u d ic h .) , C. S c h ie d ii, S ch iech t. ( th e sp e cie s h e re fig u re d ,
f rom sp e cim en s g a th e r e d in M e x ic o b y D e p p e ) , C. adianioides, P r e s l (D a v a llia , Sw .) ,
C. 9 g la u co p liyllum a n d C. p ro life rum , P r e s l, w h ic h la s t Is D e p a r ia M a cra e i, H o o k , e t
G r e v . I c . F i l . t. 134, a n d , as w e s till v e n tu r e to c o n s id e r, b o th b y its h a b it a n d fru c tific a tio
n , q u ite a d is tin c t g e n u s .
Fig. 1. Small portion of a frond, upper surface ; magn. 2 diam.—/ 2. T h e same, under surface : do.
—f . 3. Smaller portion of the same ; m. 10 diam.—/ 4. 5, 6. 7. Sori in different slates ; m. 20 diam.
—/ 8. Vertical section of a sorus; do.—/ . 9. Sporangia in different s ta te s; m. 100 diam.—-f. 10.
Ripe sporules ; m. 200 diam.—/ 11. Hairs found among the sporules ; m. 100 diam—-f. 12. Hairs from
the frond and stipes ; m. 100 diam.
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