330 PORELLA. 
Elata pallide viridis stratificata ; caules 5-6-pollicares laxiuscule pinnati, 
pinnis strictiusculis ascendentibus floribus pinnulatis, frondem 
lanceolatam sistentes. 
Folia fere horizontalia, per paria approximata, parum imbricata, ad basin 
fere usque bipartita; lobus ovato-oblongus truncato-rotundatus 
repandus subangulatusve, margine infero toto plus minus recurvo ; 
lobulus vix duplo brevior, ligulatus, plus triplo longior quam latus, 
rotundatus vel subretusus, basi semisagittatim productus ibidemque 
runcinato-ciliatus, ceterum integerrimus planus cauli appressus ; 
cellule mediocres zquilateree pellucide, ambitu anguste opace, 
folii marginem versus sensim subminores. 
Foliola foliis duplo fere breviora, duplo longiora quam lata, appressa, 
ligulata, apice subrotundata subtruncatave, basi longe decurrente 
runcinato-timbriata. 
Flores dioici: 9 ad ramos primarios, rarius in ipso caule, laterales. 
Bractez bijugse, intime foliis plus dimidio breviores, paulo ultra 4 
complicato-bilobe ; lobus rhomboideo-lanceolatus vel semiovatus 
apiculatus distanter ciliatus; lobulus duplo minor lanceolatus 
ligulatusve ciliatus ; bracteola foliolis subeequimagna, paulo latior, 
ciliolata denticulatave. 
Perianthia alte emersa, bracteas triplo fere excedentia, late ovalia com- 
pressa antice obtuse 2-plicata, postice late unicarinata, ore angusto 
minute spinuloso-denticulata demum bilabiata. Calyptra paulo 
minor, obovata opaca, bilabiatim rupta. Capsula magna globosa. 
Elateres torti bispiri, utrinque subobtusi, diametro sporis globosis 
sublevibus triplo angustiores. 
Amenta ¢ ad ramos lateralia, folia duplo superantia, badia brevi- 
cylindrica julacea ; bracteze arcte imbricate, opposite, foliis multo 
minores complicato-concave bilobee, lobulo lobo duplo minore, cum 
bracteola interposita, lobuloque bracteze contrarie, in labium tri- 
lobum connato. 
Obs. Inter omnes Porellas Andinas pro perianthio microstomo insignis. 
Var. MACROPTERA (Porella macroptera Mst.). 
Cum P. ptilopsi sat convenit, differt autem fronde longiori (9-pollicari) 
angustiore, pinnis (tam pl. ¢ quam pl. 2) floribus crebre pinnulatis. 
Folia minora, magis opaca, cellulis subminoribus, dimidio supero 
leniter recurvula, margine postico a paulo supra basin ad vel ultra 
medium valide incurva. Perianthia ovalia, seepe facie antica alte 
convexa, quasi late unicarinata, alia (sulcé media interveniente) 
2-carinata, facie posticaé autem semper concava, e media concavitate 
prominula et 1l-carinata, basi et paulo altius cellulis 3-2-stratis, 
deinde ad apicem 1-stratis, conflata, ore parvo brevissime lobulata, 
lobulis 10-20 angustis ciliato-spinulosis conniventibus ; demum pro 
capsule emissione hine vel utrinque hiantia. Calyptra perianthio 4+ 
brevior, obovata, carnosa, basin angustam versus 8-10 cell. crassa, 
demum ineequaliter triloba, basi pistillidiis sterilibus sub 10 circum- 
data. Pedicellus breviter exsertus validus, cellulis 18-20 (sectione 
hexagonis) in diametro. Capsula subglobosa rufa, valvulis 4 
ineequilatis, demum vario modo fissis, dehiscens; exothecium 
cellulis squalibus oblongo-hexagonis (fere rectangularibus) sat 
crassis, ad angulos columnis flavo-fuscis fulcitis, caeeterum leptoder- 
mibus, constans; endothecium flavidum tenue, facile secedens, 
cellulis 2~3-(margines valvularum versus sepe solum 1-) stratis, 
majoribus, inequilato-4-7-gonis leptodermibus conflatum, capsule 
