Pleurozium.| 17. STEREODONTEX. | 037 
103. PrEvRozivM, Sulliv. Muse. Un. St. 68. 
Musci caulibus elongatis, rubris, paraphyllis inspersis deficienti- 
busve. Folia lata, brevia, imbricata, ad apices caulium et ramo- 
rum in gemmas congesta, nitida. Thece longe pedunculate, 
arcuate. 
1. P. ScunEBER1 (Willd. Prodr. Fl. Berol., Hypnum). Caulis ruber, 
pinnatim ramosus. Folia appresse imbricata, late oblongo-ovata, obtusa, 
cochleariformi-concava, apice cuspidato-complicata, basi contracta, nervis 
brevibus, marginibus apice subcrenulatis basi recurvis, cellulis angustis 
basi ad angulos abbreviatis subquadratis incrassatis aurantiacis ; perichze- 
tialia elongata, erecta, arcte convoluta, breviacuminata. Theca in pedun- 
culo elongato purpureo oblonga, arcuata, horizontalis, operculo conico 
acuminato, peristomii dentibus subulato-attenuatis, intus trabeculatis, in- 
terni processibus hiantibus, ciliis singulis appendiculatis interjectis. 
Hab. Andes Bogotenses, Bogota, in monte Serrato (9600 ped.), Weir, 
n. 358. Andes Quitenses, Jameson, in monte Pichincha, Spruce. 
Rami erecti, 3-6-unciales. | Folia straminea, nitida. 
This elegant species, in its habit and thin, shining, and almost 
nerveless leaves, stands apart from the numerous groups of Hyp- 
noid mosses, its nearest affinity being with H. Oakesit, Sulliv., of 
North America and Europe, and thus approaching to Pleurozium 
splendens. 
2. P. EHRENBERGIANUM (C. Müll. in Bot. Zeit. 1856, 458, Hypnum). 
Dioicun, latissime czspitosum, procumbens, vage ramosum, stramineum, 
rigidum, ramis longis brevibusque pro more curvatis. Folia caulina dense 
conferta, ramulos teretes sistentia, humore laxe erecto-patentia, ramulos 
turgentes efficientia, splendentia, e basi decurrente laxe reticulata late 
ovata breviter acuminata, acumine brevissimo obliquo terminata, sub- 
cochleariformia concava, e basi usque ad medium revoluta parum longitu- 
dinaliter plicata, breviter binervia, apice denticulata, e cellulis angustis- 
simis linearibus pallidis areolata, subscariosa; perichztialia multo robus- 
tiora, externa minuta late ovato-rotundata obtusissima, margine erecta, 
enervia, integerrima, interiora sensim acuminata et plicata, intima e basi 
longe vaginantia plicata laxe elongate reticulata enervi in acumen longis- 
simum pro more valde reflexum vix denticulatum producta, ante acumen 
grosse serrata et irregulariter dentata. Theca in pedunculo elongato rubro 
levi erecta, magna, turgide ovalis, brevicolla, macrostoma. 
Hab. Mexico, Ehrenberg. 
Operculum non vidi, peristomium imperfectum. Ex habitu Hypno um- 
brato aliquantulum simile, locum prope H. órevirostrum Ehrh. tenens, e 
characteribus laudatis facile cognoscendum.— C. Müll. l. c. 
