Hypopterygium. | ll. HYPOPTERYGIEX. 329 
Sect. 1. Lopidiwm, Hook. f. et Wils. 
1. H. PLuMARIUM (Mitt.). Monoicum; rami plumeformes, pinnati. 
Folia patentia, imbricata, anguste oblongo-lanceolata, stipuliformia a basi 
latiore ovato-lanceolata, patula, omnia nervo in mucronem excurrente 
instructa, limbo superne serrulato marginata, cellulis parvis rotundis ; 
perichetialia erecta, subulata, attenuata, integerrima. Theca in pedun- 
culo brevi crasso cygneo-flexo, ovalis, zqualis, operculo subulato, pe- 
ristomii dentibus teneris, interni processibus angustis, in membrana bre- 
vissima impositis. 
Hab. Brasilia, Parana, in sylvulis “ gapaos” planitierum ‘‘ campos” 
ad arborum truncos, etiam Fazenda do Lageado prope Corritiba (2000 
ped.), Weir, n. 1. Ins. Chiloe, Lobb ; ins. Auckland, J. D. Hooker. 
Rami 3-unciales, latitudine cum folis lj-lineares. Folia pallide vi- 
ridia, cartilaginea, lutescentia. Pedunculus 2-linearis. 
H. concinno simile, et flexura pedunculi etiam conveniens, sed flo- 
rescentia et peristomio diversum. 
Sect. 2. Euhypopterygium. 
2. H. rigipuLuM (Mitt.. Stipes foliis latissime cordato-ovatis acu- 
minatis recurvis nervo medio evanido integerrimis, ramis in frondem ob- 
longam subtriangularem dispositis. Folia nervo medio evanido, limbo 
angusto superne serrulato, cellulis rotundatis, utriculo vix conspicuo, 
stipuliformia, patula, orbiculata, nervo in mucronem excurrente, ramulina 
ovata acutiora denticulata ; perichetialia erecta, subulato-acuminata, api- 
cibus serrulatis. Theca in pedunculo elongato, ovalis, horizontalis, oper- 
culo subulato, peristomii dentibus subulatis angustis, interni processibus 
carinatis ciliis brevioribus interpositis, in membrana ad dentium medium 
exserta impositis. 
Hab. Andes Bogotenses, in sylvis prope Bucamaranga et Pacho (6000— 
7000 ped.) frequens, Weir, n. 348. 
Stipes uncialis, basi radiculosus, ramis iu frondem unciam latam ex- 
pansis. Folia luteo-viridia. Pedunculus }-uncialis. 
H. sylvatico robustius, ab H. tamarisci rigiditate et folüs in stipite 
recurvis stipuliformibus patentibus rameis latioribus cellulis minoribus 
recedit. 
3. H. sytvaticum (Mitt.). Stipes brevis, folis late subdeltoideis 
ovatis apiculatis nervo medio evanescente, superne in frondem oblongo- 
triangularem divisus. Folia ramea nervo infra apicem evanido, limbo 
superne pauci denticulato, cellulis rotundis parvis utriculo repletis ; stipu- 
liformia orbiculata, nervo in mucronem excurrente; ramulina argutius 
serrulata, acutiora; perichetialia erecta, ovata, acuminata, integerrima. 
Theca in pedunculo elongato, ovalis, horizontalis nutansve, operculo subu- 
lato, peristomii dentibus subulato-attenuatis, interni processibus æqui- 
