TAB. CCXXXVII. 
ACROSTICHUM SIEBERT. 
FILICES.—G»rnarz. Br. 
Poryropnraczz. Kaulf.  Firrcss verm. Willd. 
Gzw. Cuag. JCROSTICHUM, Linn. 
Sori amorphi, seu Capsule per totam paginam infe- 
riorem frondis (interdum diversz) ad ejus partem sparse. — Znvolucrum nullum (nisi squamula 
vel set: in quibusdam capsulis interstinctz). Jr. 
LS 
E 
"s 
ACROSTICHUM .Szeberi ; fronde simplici oblongo-lanceolata obtusa integerrima glabra nitida coria- 
ceo-rigida margine incrassato subrecurvo, inferne attenuata in stipitem fronde breviore subseta- 
ceo-squamosa, fertili angustiore caudice basique stipitis squamis subulato-setaceis longissimis 
Obsitis. ! 
Acrostichum latifolium. Sieb. Syn. Fil. INo. 26. (non Swartz). 
Has. In Insula Mauritii. Sieber; BHojer. 
Caudex ut videtur brevis, crassus, squamis numerosis rigidiusculis, undulatis, membranaceis, reticulatis, intense 
nigro-fuscis densissime crinitus. 
Stipes digitalis, erectus, tereti-subangulatus, crassiusculus, compressus, facie anteriore sulcatus, hic illic squamosus; 
squamis subulatis, nigris, deciduis. | 
Frons spithamzea fere ad pedalem, oblongo-lanceolata, rigida, coriacea, nitida, integerrima, obtusa, inferne atte- 
nuata, costata, margine incrassáto, cartilagineo, recurvo; cosía lata, subtus prominens, nuda; nervis hori- 
zontalibus parallelis approximatis dichotomis ad marginem ap: Fertilis sterili minor, longius 
stipitata, magis angusta. 
Capsule totam partem inferiorem frondis, costa excepta, tegentes, fusce, globosse, lato-annulatee, sublonge stipi- 
tatae. 
Semina reniformi-subglobosa, angulata. 
Fig. 1. Squama e caudice. f. 2. Capsule. f. 3. Semina:—magn. auct. 
Perhaps scarcely any of the Ferns require more careful investigation than the simple-leaved 
"Acrosticha ; those of the East Indies, owing to some general resemblance, having, we fear, been 
confounded with those of the tropical parts of the New World. "The present species, for example, 
has much general affinity with the 74. /at/folium of Swartz, and hence Sprengel has mentioned it as 
a native of the Mauritius as well as of Jamaica, and Sieber has published specimens in his /Synopsis 
Filicum, No 26., under that name. But we find it to differ in the narrower and more obtuse, 
much more distinctly margined frond, in the shorter stipes, and, what we consider of the most 
consequence, in the different nature of the scales of the caudex, which extend to the base of 
the stipes: for whereas in our plant they are about three quarters of an inch long, of a deep 
glossy brownish-black colour, and so narrow as to give a crinite appearance to the parts on which 
they are found,—in the West Indian 24. /atfol?um they are short, broad, of a paler colour, and 
considerably ciliato-dentate. 
