334 PORELLA. 
proximum plus minus excedentia, ovato-cylindracea, julacea; bractez 
opposite, foliis breviores latioresque, arctissime imbricatz, basi antica 
semicordata pro brevi spatio cum contraria connate, ultra 4 bilobe, 
lobulis posticis mediante foliolo conformi in laminam apice trifidam 
recurvam alte connate ; antheridia solitaria (cujusque sacculi bina) 
maxima ovali-globosa. 
Var. megaloura S. Robusta ; caules 10™ et ultra alti, seepe bipinnati. 
Fola magna valde crispata, solum obtusa vel etiam subacuta, ad 
sinum insigniter spinoso-appendiculata, lobulo utraque basi inciso. 
Foliola latiora, seepe rotundo-oblonga, basi decurrente magis laciniato- 
erispa.—Hab. secus fl. Pastasa, ad cataractam Agoyan in rupibus, ad 
Rio Blanco ostia in ramis; etiam in m. Tunguragua ad terram inter 
Vaccinia lichenesque. 
Var. oreopteris S. Robusta, elata—fere pedalis. Foliorum lobus margine 
postico a basi ad } recurvo, parnm vel non crispulus. Bracteze 
longiciliate.—Hab. in monte Pichincha ad ramos (W. JAMESON et 
R. 8.) ; quoque in m. Azuay a cl. JAMESON lecta fuit. 
Obs. In all the forms of this variable species the perianth is normally 
10-plicate, but the plicee are often irregular and inconstant in number ; 
the medial postical fold is however always the most prominent, showing 
the primitively trigonous form of the perianth.—I have taken as the type 
of the species the form which is most frequently fertile throughout the 
Quitenian Andes. Jameson’s original specimens are larger and often 
sterile, but shew no structural difference besides the leaves being less 
crispate. Mitten, on the faith of a specimen in Taylor’s herbarium 
named Mad. subciliata L. et L., has referred it to that species, from which 
it differs essentially in the underleaves having a caudate and laciniate 
prolongation at each basal angle, whereas those of M. subciliata are said 
to be “integerrima vel subdenticulata.” I cannot help suspecting some 
oversight in the description of M. subciliata (which was founded on a 
specimen of Jameson’s) ; for neither by Jameson nor myself has any 
Porella been gathered which has the leaf-lobule laciniato-caudate, yet 
lacks a similar appendage to the underleaf. 
8. PoRELLA BRACHIATA (Tayl.). 
Madotheca brachiata Tayl.! in Muse. Jamesonianis exsice. 
Hab. Andes Quitenses, ubi legit W. JAMESON (a meipso nusquam in vivo 
visa). 
Habitu et statura M. arborea J. congruit, differre videtur caracteribus 
sequentibus. 
Folia solum subimbricata semicordato-oblonga-ovatave, apice rotundata 
decurva, margine postico inferiore subcrispa, caeterum plana, basi 
posticé breviter 1-2-ciliata, anticaé subunidentata—raro (quoad lobum 
majorem) omnino inermia; lobulus lato-ligulatus oblique rotun- 
datus valde crispatus, basi interna laciniis 1 vel 2, raro pluribus, 
elongatis sagittatus hastatusve, extern& in appendiculum ciliis de- 
vexis fimbriatum dilatatus; cellule firme guttulate minutule 
(go—ay™™) valde incrassatee, marginales lobulorum et foliolorum 
magis opacee et crassiores. 
Foliola lobulis breviora, vix latiora, ovato-ligulata subrotundata, infra 
medium runcinato-ciliata, aliquando subhastata, basi in ala valde 
laciniata super caulem Jonge decurrentia. 
Cxetera non habui. A P. arborea egre separanda. 
