Pogonatum. | 20. POLYTRICHES. 619 
Hab. Mexico, Coulter ; Venezuela, prov. Caracas (4000 ped.), Funck et 
Schlim, n. 379, Birschell. ` 
Caulis uncialis. Folia ferruginea, sicca incurva 3-linearia. Pedunculus 
13-uncialis. 
Ex habitu staturaque P. aloidi simillimum, sed e foliorum basis struc- 
tura diversum. Cum P. urnigero comparat Cl. Miiller, ab eo autem satis 
differt. 
20. P. varians (Hampe in Ann. Sc. Nat. ser. 5. iv. 350, Polytrichum). 
Humile, laxe cespitosum, subsimplex, interdum basi divisum vel apice 
prolifero-ramosum, fusco-viride, caulis e basi attenuata nuda microphyllina 
versus apicem accrescenti-clavatus, rigidiuscule adscendens. Folia im- 
bricata, accumbenti-erecta, breviora, sicca obtuse carinata, inflexa, apice 
parum curvata, humida patula, e basi vaginante integerrima, rufescenti- 
diaphana, lato-lanceolata, margine remote sinuato-dentata, dorso glabra, 
apice plus minusve scabra, cellulis basilaribus anguste elongato-quadratis, 
lateralibus magis elongatis linearibus, intermediis sensim abbreviatis, ad 
marginem laminz subrotundo-punctatis, in superiore parte foli multi- 
lamellosi nervo crasso fere tota obscura. Seta erecta, uncialis et altior, 
caulem superans, apice tortilis. Theca brevis, junior suberecta, oblique 
oblongo-cylindrica, sub ore constricta, operculo umbonato rostrato, rostro 
compresso obtusiusculo, deoperculata curvata ubique verrucoso-punctata, 
demum octies plicato-striata, plus minusve ferruginea, peristomii dentibus 
40, brevibus, obtusis, pallescentibus; calyptra aurantiaca, longa, thecam 
omnino includens. 
Hab. Andes Bogotenses, Bogota, Guade'1pe monte del Morro et in 
sylvis Manzanos (2200-3100 metr.), Lindig — 
P. tortili affine ; differt foliis margine evidenter serratis theca papillosa. 
—Hampe, l. c. 
124. Potyrricuum, Dill., Linn. 
Musci humiles vel elati, caulibus rigidis tenacibus parum divisis. 
Folia rigida, canaliculata, intus lamellis obtecta. Thecæ in pedun- 
culo rigido elongato cubice vel sexangulate, demum inclinate 
horizontalesve. Habitatio ad terram. 
Folia margine inflexa integerrima. 
Folia in pilum diaphanum producta ......... . 1. P. piliferum. 
Folia basi subovata... -sissa erkene cee sc 2. P. juniperinum. 
Folia basi oblongo-ovata .............. ee 3. P. antillarum. 
Folia basi usque ad dimidium folii elongate oblonga. 
4. P. aristiflorum. 
Folia basi quadrato-orbicularia............. . 9. P. juniperiforme. 
Folia basi oblongo-ovalia .............. 6. P. conforme. 
Folia margine serrata. 
Folia basi pallide ochracea breviter oblonga .. 7. P. commune. 
