124 PLATY-LEJEUNEA. 
Suscenus XIJ.—PLATY-LEJEUNEA, 8. 
Elata, arborum ramulis foliisque repens, dein pendula, saturate badia v. 
rufo-badia. Caules 1-6-pollicares et longiores, serpentini flaccidi 
inzequaliter pinnati, vel pinnatim divisi, apice seepe longe sim- 
plices. 
Folia magna (1°3-2°6™") parum (raro dense) imbricata, siccando fere im- 
mutata, horizontaliter patula, apice tamen margineque antico sepe 
incurva, postico plus minus recurvula, unde ex ovato-oblongo ligu- 
lata videntur, rotundata obtusave, rarius apiculata, integerrima, 
basi sinuato-complicata; lobulus parvus turgidus seepe cucullatus ; 
cellule majusculee mediocresve subpellucidé pariete incrassato. 
Foliola foliis sat breviora, seepe autem latiora, obovato-orbiculata v. 
reniformia, retundata retusulave integerrima. Haustoria e radicellis 
valde numerosis fastigiatis—sepe ex parte colligatis—scopeeformia. 
Fl. dioici, raro monoici; 2 ramo brevissimo, foliis minutis 1- (raro pauci-) 
jugis infra bracteas stipato, insidentes, innovatione brevi parvi- 
paucifolia semper suffulti. Bracteze minute, foliis 2-4-plo minores, 
obcordato-bilobz, complicate, lobis exacte (v. fere) sequimagnis; 
bracteola angusta, apice retusa v. tridentata, raro Difidula. 
Perianthia ultra bracteas emersa, f, caulinis tamen semper sat breviora, 
oblonga obovatave, apice rotundata, retusa, obcordatave, rostellata, 
valde compressa, margine toto, v. saltem supero, inciso-timbriata- 
ciliatave, facie postica apicem versus valde humiliter 1- 2- v. 3- 
carinulata, carinis spinoso-alatis inermibusve, interdum papillis 
pilisve sparsa, vel omnino nuda, antice subplana inermia raro sub- 
spinulosa. 
Andreecia v. terminalia, v. ramulo proprio constantia, leptostachya, 
polyphylla. 
Hab. In arborum truncis ramulisque, imo in foliis vivis, perseepe aliis 
hepaticis et muscis irrepentes, sylvas planitiei et montium humiliorum 
densas humidas diligentes. 
Distr. Species 8 vel 10 adhue cognitee omnes Americee tropic incole, 
earum unica (Pl. L. transversalis) etiam in Australia et ins. Hawaii 
inventa est, nulla tamen Asiatica. 5 species a meipso lectee per sylvam 
Amazonicam et Andes inferiores (tam occidentales quam orientales) 
solum ad alt, 1200™ usque, babitant. 
A. Dioice. 
a. olia rotundata. 
1. P. L. subrotunda. ¥. confertissima late semicordato-ovata; lobulus 4- 
plo brevior bifidus, segmento inferiore majore cucullato, superiore 
rhombeo plano. Foliola magna late imbricata reniformia, fere duplo 
latiora quam longa, breviter decurrentia retusa, toto margine recur- 
vulo, basin versus foveolata. Br. lobo antico subminore. 
2. P. L. teniopsis. F. parum imbricata praelonga semicordato-ovato- 
oblonga, margine antico incurvula, postico valide recurva; lobulus 
6-plo brevior cucullatus. Foliola subimbricata reniformia longe 
decurrentia apice retuso recurvula, medio unisulea. Br. lobo antico 
subminore. Per. obovato-cuneata, margine supra medium inciso- 
ciliata, dorso obsolete Dicarinata pauciciliataque. 
