ON SOME IRISH FORMS OF FISSIDENS 147 
these three plants would seem to constitute a fairly well-defined 
group (to which of course some other exotic species now included 
under the section bien may be found to belong), characterized 
by the above feat 
ny case, agar’ from the epee ~ incline to think the 
tout ensemble of a ane referred to above sufficiently pone! 
guish the Glasnevin plant, and I therefore creel for it the na 
of F’. ewsul. If it be objected that it is unlikely that two slaw 
allied, yet distinct, exotic species should have arrived repre re 
in the neighbourhood of Dublin, the objection must be adm 
to have some weight; but the alternative suggestion mae to 
e almost equally Sa bis viz. that F. teqguendamensis, dis- 
covered by a river near Dublin in 1880, in minute quantities, and 
with all the characteristics of the species in its native habitat, 
should, after a disappearance of thirty years, reappear in palm 
ent in the botanical gardens at Glasnevin in abundance, under 
a quite different guise, with a new form of inflorescence, and 
owing a very distinct habit, colour, and structure—far more 
several . are rightly, 1 no doubt, held distinct. 
ens exsul, sp. nov. Polyoica ; vel Lorin vel 
s pauci 
magnitudine maxime variabilia, 1-2 ‘5 mm. lata 
(seepe tamen minora), late vel anguste iatieeclati'é superne sensim 
acutata, ad apicem plerumque valde acuta, interdum subobtusa 
mucronata, toto ambitu he valido cincta, nervo valido cum 
limbo in unum confluente im mucronem brevem validum acutum 
excurrente, Lamina dorsalis basin versus sensim angustior, in- 
serti op ; 
opaca; cellule hexagon 8-14 p late, parietibus pro more tenui- 
=. sat firmis, basin versus et ‘iti fere lamine vaginantis laze, 
ate hexagono-rectangulares, magne. Seta terminalis, gracilis, 
eben straminea, inferne rubra, 8-15 mm. alta. Theca minuta, 
cernua, ei. teq amensis similis. Peristomium rubrum, 
dentes infra medium fissi, cruribus gracilibus, filiformibus, grosse 
papillosis, gi prominentem optime exhibentibus; pars indivisa 
extus den iineayen anne intus lamellas peraltas once Saige 
pe 
minuti, 6-8 », levissimi. 
Hab. ‘On the surface soil (loam) in pots and tubs where 
palms are grown in the Botanic Gardens, Glasnevin, Dublin”; 
Novy. 1909 ; leg. D. McArdle. 
seoial from F. te -dapiotryatioded oo still more from F. algar- 
vicus, e larger size, umerous, much larger and broader 
loaves, Ghlotoplo ile a somes ae sacar seta. From F. algarvicus 
also in the stoutly excurrent nerve and cernuous, curved capsule. 
In general —— t closely resem vonsubbon F Incurvus, from which, 
m2 
