PORELLA. 333 
secedens, tenerum, cellulis irregularibus, fibra pertenui inclusa 
obscure reticulatis, constans. Elateres parvuli tenues 2-3-spiri. 
Spore magne, elateribus 4—5plo latiores subglobose setulis minu- 
tissimis asperule. 
Caulis in hac specie compressulus est ; cellule parvee sub 12-stratee 
(24 in sectionis diametro), stratorum 4 vel 5 extimorum ad Palmarum 
instar opace, rufo-badize vel nigrescentes, pachydermes, sectione sub- 
elongate ; interne pallidee leptodermes, sectione subsequilaterie. 
Madotheca Brasiliensis Raddi, subaffinis, caules habet simpliciter 
pinnatos, folia late semicordato-ovata, auricula interlobulari galeata 
subsaccatave, lobulo subspinuloso ; foliola ovato-lingueeformia spinulosa 
(basi ac in nostra decurrentia et laciniata) ; bracteas laciniato-spinosas. 
7. PORELLA ARBOREA (Tayl.). 
Madotheca arborea Tayl.! in Lond. Journ. Bot. 1846. 
Hab. in sylvis Andium Quitensium, alt. 1500-3000", ad latera montium 
Tunguragua et Pichincha preecipue, ubi ad arborum ramulos pulchre 
viget. 
F, lobus 2:2 x 1°6, lobulus 16 x -4; ¢ 3-ss; f' (basi decurrente exclusa) 
15 x “75; per 2°0 x 2:0, 2:0 x 25,30 x ‘25mm, 
Elata fulva rufescensve. Caudex principio adest, prostratus, brevis, sub- 
ramosus, e foliis caducis cito denudatus, radicellis brevibus foliolorum 
reliquiis adnatis in matrice repens; fragilis est denique dissolutus, 
primum autem caules suberectos pendulosve profert. Caules 6-8°™ 
longi validi rufo-badii pinnati, frondem lineari-lanceolatam sistentes ; 
rami breves ($-1™) raro iterum subpinnulati, apice sensim attenuati 
decurvulique. 
Folia subopposita dense imbricata patula subdevexa undulata, ad basin 
fere usque bipartita; lobus oblique semicordato-ovatus sensim 
angustatus obtusus repandus, subundulatus, toto margine postico 
valde sinuato-crispus (sinubus sub 5), basi laciniis 2-4 subulato- 
acuminatis deorsum spectantibus auctus; lobulus vix dimidio 
brevior ligulatus subfalcatus obtusatus, basi interna subspinosus, 
externa in processum obtuse incisum vel ciliatum productus ; cellule 
parvulz pellucidz suboblongz, trigonis angularibus maximis, basin 
versus submajores flavidee. 
Foliola imbricata suberecta, lobulis subeequilonga, duplo fere latiora, 
late ligulata rotundata, toto margine recurva, utraque basiin cristulam 
sinuato-lobulatam super caulem decurrentia. 
Flores dioici: 2 in ramo brevi vel haud raro subelongato terminales. 
Bractz foliis subzequales, magis acute, lobulo longiore toto margine— 
lobo solum margine postico (interno)—dentato-ciliato-spinosove ; 
bracteola ovato-ligulata, emarginato-bifida, margine plano recurvulove 
ciliata. 
Perianthia late ovalia ore subconstricta, demum (supramatura) ex ore 
hiante compresso-campanulata, superne 10-plicata, apice ad 4 
laciniata, laciniis 20 (sce. 10, bipartitis) tenui-acuminatis ciliatis. 
Capsula majuscula globosa badia bistrata; cellule inanes, exteriores 
sectione transverse rectangulares, pariete valde incrassato, interiores 
minores teneres secedentes. Elateres elongati arcte bispiri obtu- 
sissimi diu persistentes. Sporee magne ovali-globose minute 
tuberculosie. 
Amenta ¢ ad caulem et ramos primarios lateralia, folium caulinum 
