TAB. CXLIII.
D A V A L L I A BO R V A N A .
FILIC ES .— G y r a t æ . B r . P o l y p o d ia c e æ . K a u lf . F i l i c e s veræ. Willd.
G e n . C h a r . D A V A L L I A , Sm. S o ri subrotundi (vel in lineola verticali) margini plerumque
approximati. Involucrum supcrficiarium, e x apice venæ unicæ ortum, lateribus vel lata basi
adnatum, exterius e t verticaliter libcrum. B r .
D a v a l l i a Bo ryan a -, fronde pinnata, pinnis dimidiato-oblongis obtusis basi truncatis, margine
superiore inciso-crenatis soriferis, caudicc lo n g e repente.
Davallia Boryana. P r e s l. in R e liq . H c en k.fasc. 1. p . 6 6 . Sjireng. S y s t. V eg e t. v. 4. p . 119.
D ick son ia repens. B o r y V o y . v .2 . p . 3 2 3 . S w a r tz . S y n .F il. p . \ 3 3 . W illd . S p i P l . v .h . p . AS2.
H a b . In arboribus Insulæ Barboniæ. Bomj. Insula Mauritii. N e rau d , Te lfair, Wallich.
Insulis Philippinis. H a n k e .
Caudex in truncis arborum longe repens, crassitie pennoe passerinoe, ramosus, valde squamosus, squamis fuscis,
nitidis, hic illic radicans, radicibus fusco-tomentosis.
Stipes sub-biuncinlis, flavo-fascus, nitidus, nudus vel subpaleaceus.
Fi'ons pedalis, circumscriptione lanceolata, longe attenuata, flexuosa, pinnata, pinnis alternis subuncialibus, pallide
viridibus, tenui-membranaceis, dimidiato-oblongis, obtusis, basi truncatis, margine inferiore integerrimis,
superiore inciso-crenatis ; lobulis soriferis, pallide viridibus, nervosis ; nervo primario, seu costa, tenui, laterali,
.ad marginem inferiorem pinnoe, reliquis obliquis, furcatis.
Sori subrotundi, ad basin lobulorum, marginis superioris pinnarum, venas terminantes.
Involucmm suborbiculare, tenue, membranaceum, convexum, basi aiHxum, margine superiore lateribusque liberis.
Capsuloe sphoericæ, sublmige stipitatoe. Stipites capsulis duplo longiores.
Semina subglobosa, angulata, pallide fusca, subpellucida.
Fig. 1. Pinna, f. 2. Portio soriferæ pinnæ. f. 3. Capsuloe. f. 4. Semina:— aKcA
This very graceful and beautiful Fern has been communicated to us from the Mauritius, both by
Mr. Telfair and Dr. W allich, where it appears to be n o t uncommon. Hæ n k e discovered it in the
Philippine Islands, where th e fronds attain the h e igh t o f two feet. W e p osse ss from the Herbarium
o f the Horticultural S ociety what we consider another species, and nearly allied to the present,
gathered by Mr. Macrac in th e crater o f the volcano at Owhyhce. This corresponds in siz e with
the plant o f Hæ n k e ; but it is o f a far more rigid texture than D . B o r y a n a , and has th e upper
margin o f th e pinnæ much more regularly crcnatcd, each to o th or lobule soriferous, so that the
fructification forms a regular line or chain alon g th e upper edge.
The fructification will be found to be considerably different from that o f the other well-known
Davallioe, coming near to that o f Lindscca, with which genus this plant agrees in habit.
i !