462 15. NECKERES. [ Porotrichum. 
parvifoliis, nune ramulis omnibus longe attenuatis valde variantes. Folia 
vix nitida, viridia. Pedunculus uncialis vel longior. Theca satis magna 
fusca. 
This most variable species differs so much in appearance, from 
the greater or less division of its fronds, that it is probably 
already described under several names. In C. Müller's * Synop- 
sis, ii. 223, the internal peristome is described with single cilia 
interposed between the processes; and Dr. Taylor described his 
Hypnum floridum with two very short ones. 
7. P. LANciFRONS (Hampe in Linnea, xxxii. 158, Hypnum).  Dioi- 
cum, dendroideum, distiche ramosum, lanciformi-frondosum ; caulis e sur- 
culo horizontali fusco tomentoso repente erectus, basi nudiuscula purpuras- 
cente vel infra frondem foliis minoribus ovatis acutis laxe obtectus tan- 
dem distiche pinnatim ramosus, ramulis attenuatis. Folia distiche imbri- 
cata, lateralia e basi uno latere parum inflexo, apice evidenter inciso-ser- 
rata, nervo lutescente supra medium evanido, cellulis linearibus lutescenti- 
diaphana. Sete (3-4 in fronde) glabrz, erectze, unciales, rubrze. Theca 
ovata, parum curvata, adscendens, operculo brevi conico rostrato, peri- 
stomii dentibus externis brevibus lanceolatis acuminatis diaphanis luteis, 
interioris cruribus carinatis pallidis, ciliis geminis interpositis. 
Hab. Andes Bogotenses, in sylvis Manzanos (2700 metr.), Lindig. 
8. P. DENTICULATUM (Mitt.). Rami superne in frondem bipinnatam 
ramulosi. Folia in stipite triangularia brevia, reflexa, marginibus reflexis, 
in media parte superiore distiche compressa, marginibus inferioribus re- 
flexis, superioribus denticulatis, nervo ad $ evanido, cellulis basi paucis 
elongatis, reliquis parvis ovoideis apice brevioribus; ramulina minus com- 
pressa, late ovalia, acuminata, argutius denticulata, caviuscula, nervo apice 
exstante; perichztialia majora, interna e basi lata oblonga, nervo obsoleto, 
subito in acumen angustum elongatum producta. Theca in pedunculo 
elongato, ovalis, collo sensim attenuato, inclinata, operculo oblique subulato. 
Hab. Brasilia, in Sierra inter Antonina et Corritiba (1500 ped.) ad ar- 
borum truncos in locis humidis, Weir, n. 69. 
Rami stipite unciali, foliis pallidis remotis reflexis ubique vestito, superne 
in frondem planam eleganter decrescenti-bipinnatim ramosi. Folia intense 
viridia, parva, cellulis parvis utriculo repletis mollibus. Pedunculus 9- 
linearis ruber. Theca pro planta satis magna. 
9. P. srRIATUM (Mitt.). Rami superne in frondem bipinnatam divisi. 
Folia ramea distichacea, compressa, superne undulata striisque parvis 
notata, nervo infra apicem evanido, marginibus inferioribus recurvis, supe- 
rioribus serrulatis, apice denticulata, cellulis elongatis angustis, apice 
paucis latioribus ellipticis; ramulina breviora, apice acutiora. 
Hab. Brasilia, in Sierra inter Antonina et Corritiba (1800 ped.) ad rupes, 
Weir, n. 76. 
