Holomitrium. | 1. DICRANE®. 61 
13. H. OrrrEnsiANuUM (Horasch. ia Mart. Fl. Bras. Muse. 18). Caulis 
humilis. Folia basi erecta, subquadrata, superne dilatata, amplexantia, 
inde patenti-recurva, angustata, oblonga, acuta, nervo sub apice dorso 
dentato carinata, marginibus serratis, cellulis basi paucis elongatis an- 
gustis, alaribus conspicuis, superioribus parvis rotundis; perichztialia in 
cylindrum laxum elongatum fuscum convoluta, apicibus ad thecze oblongee 
basin attingentibus, peristomii dentibus brevibus angustis. 
Hab. Brasilia, Praia Vermelha ad arbores, Gardner, n. 28. 
Caulis uncialis. Folia viridia. Pedunculus 4-linearis. 
14. H. Wricurit (Sulliv. in Proceed. Amer. Acad. 1861, 279). Caulis 
elongatus. Folia densiuscula, patentia, recurva, acuminata, nervo angusto 
percursa, planiuseula, marginibus superne dentatis, cellulis basi in medio 
folio elongatis luteis, ad margines in seriebus circiter 5 oblongis rectan- 
gulis pellucidis latioribus, in serie unica externa minoribus quadratis 
pellucidis, superioribus oblongis laxis; perichetialia in cylindrum elon- 
gatum exserta, apicibus elongatis angustis erectis serrulatis. Pedun- 
culus gracilis, flavus. 
Hab. Cuba; in sylvis densis ad arbores, Wright, n. 42. 
Caulis 1-1i-uncialis. Folia superiora viridia, inferiora fusca, siccitate 
parum contorta. 
Species ob folia basi haud dilatata, cellulis laxis areolata a reliquis Holo- 
mitriis diversa. 
15. H. proLIrFERUM (Mitt.). Caulis humilis, tomentosus, apice ra- 
mulos plures erectos foliis parvis latissime ovatis julaceo-imbricatis emit- 
tens. Folia caulina densa, patentia, ligulata, obtusa, nervo superne tenui 
angusto in apiculum parvum excurrente, margine apicem versus grosse 
dentata, inferne integerrima, cellulis oblongis mollibus utriculo con- 
tracto obscuratis, marginalibus abbreviatis subquadratis, basilaribus ad 
angulos flavis. 
Hab. Brasilia tropica, Burchell, n. 105-110 a. 
Caulis $ unciam altus, ramulis 2-3 lineas longis. Folia lineam longa, 
sicca appressa. 
iemote from ail known ZZolomitria, excepting H. Wrightii, in 
the lax and soft areolation of its leaves. 
18. Dicranum, Hedw. Muse. Frond. ii. 91 (ex parte). 
Musci ut plurimum robusti, cæspitosi, caulibus elongatis parum 
furcatim divisis, radicellis siepe inter folia tomentosis. Folia lata, 
subulata, canaliculata, nitida, rarius obscura, cellulis elongatis 
pellucidis, alaribus conspicuis ; periehzetialia basi latiora, in tubum 
convoluta. Thecæ longe pedunculatze, ut plurimum arcuate, oper- 
culis longirostratis, peristomii dentibus latis. Zabitatio ad terram 
rupesque neenon in arboribus. 
