a c r o s t i c h u m r a d d i a n u m .
F IL T C E S .— G y r a t æ . B r . P o l y p o d i a c e æ . K a u lf. F i l i c e s v e ræ . Willd.
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Gen. C har. A C R O S T I C H U M , L in n . S o r i am o rp h i, s eu Ca p su la p e r to tam pag in am in fe rio rem
fro n d is (in te rd um diversæ) vel ad e ju s p a r tem sp a rsæ . I n d u s u m n u llum (ni.si sq u am u læ v. setæ
in qu ib u sd am c apsulis in te r s tin c tæ ) . B r .
A c r o s t ic h u m Rad d ia n um -, fro n d ib u s stipiteque. v illosissimis, s te rilib u s lin e a ri-lan c eo la tis , fe rtilibus
e llip tic is in tcg ris .
A c ro s tic h um sp a th u lin um . R a d d i, F il. B r a s il, p . 3 . t. 1 5 . / . 2 .
H ab. In udis ru p ib u s to r r e n tiim i su p e r M o n te s E s tre lle n s e s , Brasilia?. R a d d i.
Radix dense cæspitosa, fibris valde ramosis subpinnatis.
Stipites plurimi ex eaclem radice, 2—3 unda s longi, erecti, densissime pilosi, pUis patentibus rufescentibus.
Frondes stériles 3 4 imcias longæ, iineari-lanceolatæ, obtusæ, basi sensim in petiolum attenuato:, utrinque margiiieque
ferrugineo-pilosæ. H i pili sub lente serrulati sunt, basi dilatati, concavi, reticulati, membranacei
fertiles sterilibus multo breviores, ellipticæ, acutiusculoe, dorso margineque solummodo pilosæ.
Capsula totam frondem dorso tegentes, longe pedicellatæ, sphoericoe, late aunulatæ, annulo incompleto.
Semina parva, sphærica.
Fig. 1. Filus vel squama, f. 2. Capsula:, f. 3. Semina uwcA
W c have chan g ed th e n am e wh ich P ro fe s so r R uddi a p p lied to th is F e rn , b e c au s e o f its sim ila rity
w ith th a t o f spalh u la tum , g iven by B o ry de S t. V in c e n t to a s p e c ie s o f th e I s le o f F r a n c e , a u d w hich,
as fa r as we can ju d g e from th e figure in th e V o y a g e a u x Q u a tr e s Is le s des M c rs d 'A friq u c , we
a g re e w ith Raddi in co n s id e rin g ve ry n e a rly in d e ed a llied to th e p r e s e n t ; diftc rin g a lm o s t sole ly in
th e ve ry o b tu se and em a rg in a te ex trem ity o f th e fe rtile fronds.