Polypodiaceoe.
TAB. XX.
B A L A N T IU M . Presl.
B a l a n t i i e t CiBO T ii Sp. Kaulf. D ic k s o n iæ Sp. V H e r it. D a v a ix ia Sp. B r.
Sori globosi, marginales, apice venæ venulæve insidentes. Indusium cartilagineuni,
coriaceum vel herbaceum, bivalve, valvulis dissimilibus paten tib u s; verum
lu n a re ; accessorium operculiforme, convexum. Receptaculum globosum, magnum,
hispidum.— Frondes fasciculatoe aut tenuiter coriaceoe, amploe, pinnato-decompositoe.
Venæ pinnatæ, supra immersoe, subtus elevatæ, crassiusctdoe, inferiores {sæpe) fu r -
catoe, venulisque superioribus apice soriferæ. Presl.
Balantium «rôomcetts B . auricomum. Kaxdf, Enum. Fil. p .2 2Q , t . \ . f . 12. P r e s l
Pterid. p . \ ^ ^ . D ic ksm ia arborescens, H H e r it. Sert. Angl. p . 'è \ . Wall. C a l n. 6^.
■—Z). integra. Sw. Syn, F i l p . 136.
The species corresponding with the above character, as given by Presi, are, besides the
above, B . Sellowianum, Pr. {Dicksonia riparia, Beyrich Herb.), B . antarcticum, {Dicksonia
antartica. Labili., Cibotium Biliardieri, Kaulf.), B . Brownianum, Pr. {Davallia dubia, Br.
Dicksonia fallax, Kaulf.)—They are natives of St Helena, New Holland, and Brazil.
F ig . 1. Under surface of a portion of a fertile f ro n d ; magn. 4 diam.—/ 2. Upper surface of the
same ; d o .—f . 3. 4. Sori, with the valves spreading ; m. 16 diam— f 5. Upper side of a sorus ; do.
—/ 6. Vertical section of a sorus ; do.—f . 7. 7. Sporangia in different s ta g e s ; m. 50 diam,—/ 8.
Sporules ; m. 200 diam.—/ 9. 9. 9. Hairs from the receptacle of the sporangia ; m. 200 diam.—/ 10.
Hairs from the rachis of the frond ; m. 200 diam.
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