160 STEGOCARPI. PLEUROCARPI.  PILOTRICHUM. 
: Patria. Java, ad arborum truncos, in altioribus lo- 
cis m. Gédé: Zippelius. Sumatra. 
b. Folia uninervia. 
22. P. densum C, Müll; dioicum; caulis primarius 
longissime repens nigrescens tenuis nudus; secundarii 
erecti elongati densissime foliosi robustissimi, in ramos 
inaequales breves v. elongatos dichotome divisi, interdum 
subpinnati, lutescentes, rigidi; folia caulina erecto -imbri- 
cata, humore maxime patula, robusta, scariosa, fragilia, 
e basi ovata late et longe lanceolato- acuminata , maxime 
plicata, margine convexo vix revoluto, supra basin grosse 
dentato, nervo canalieulato subtenui hie illic ferrugineo 
subercurrente, cellulis minutis rotundatis luteis incras- 
salis, inferne oblongis, basi fuscis, alaribus permultis zi- 
nutissime rotundis pallidioribus polygonatis; perichaetia 
immersa parvula, folis adpressis multo minoribus late 
ovatis breviter acuminatis vaginantibus, laxiuscule lineari- 
reticulatis, crenulatis; theca vix exserta turgide ovata 
fusca firma late annulata, operc. conico -acuminato acuto; 
perist. d. ext. robusti elati late lanceolati obtusati, ad la- 
tera sinuato-articulati, laevissime trabeculati, linea lon- 
gitudinali obsoletissima, albidi maxime rugulosi, infima 
basi laeves; int. simillimi, ad latera maxime runcinato- 
dentati, dentibus apice perfecte cancellato- conflatis, in- 
ferne minus confluentibus. 
Neckera densa Wils. Lond. Journ. of bot. 1847. p. 292. t. 11. — 
Prionodon densus C. Müll. Bot. Zeit. 1844. p. 129. t. 1. sub nom. 
false incripto P. Ehrenbergii. — Neckera crassa Hsch. Fl. Bras. 
I. p. 56 et in Musc. Depp. et Schied. — Hypnum densum Sw. Prodr. 
FI Iud. Occ. p. 144. et in Hdw. Sp. Musc: p. 282. t. 74! 
Patria. Jamaica australis in montibus coeruleis, ad 
radices arborum: Swartz. Mexico, ad Xalapa: Deppe 
et Sehiede. No. 1085; in locis non designatis fertile 
primus legit C. Ehrenberg. Venezuela, ad- Tovar, alt. 
5500 pedum: Moritz. E Brasilia speciem simillimam 
sed sterilem misit Sellow. An species synonyma sit, 
latet. 
