ll'JV^^nm. MUSCI. 4]»j' 



(iui inch lou-,' from tlio base of tlic l)rivnclics) ; operculum acute-conic : tcelli rctldisli 

 hrown, the solitary ciliolic as lon<,'. — HimIw. Muse. Frond, iv. 81, t. 31 ; Kii<,'l. 15ot. 

 t. 12G0 ; Wilson, 1. c, t. 24 ; Jk-rkeley, I. c, t. 12, lig. 2. Playiotkedum denlicula- 

 tinn, Brucli & Schimp. 1. c, t. 501. 



In tlic Coast IJaiigcs, Mendwino City, and on reawood trees in Jackson XaWoy (Bolander); 

 Fort ColviUe {Lyall) ; in tlie Wiiite Mountains and Europe. 



31. H. undulatum, Linn. Procumbent, .sometimes G inches long or more, the 

 usually simple branches 2 inches long or more : leaves uhitish, crowded, ovate, 

 acute, transversely undulate, entire, one or both margins incurved at base, shortly 

 bicostate, arcolation very narrow : Ihnvers dicjccious : capsule subcylindric upon a 

 pedicel 2 inches long, curved, striate when dry, brownish yellow ; operculum acute 

 or rostellato : teeth yollowish ; ciliolaj 3, slightly shorter. — Schwaegr. Suppl. t. 282; 

 AVilson, 1. c. ; Berkeley, 1. c, lig. 4. Playiothecium undulalum, Brucli & Schimp. 

 1. c, t. :^()Q. 



Swamps near the coast, Jlendocino County {Bolnndcr) ; Orpgoii (iXcwbcrn/) ; Fort Nisnuallv 

 {Pickering) ■ Fort Colville {Lyall) ; Europe. 



II. ROBirsTCM, Hook. Stem creeping, with very stout decumbent densely leafv broad flattened 

 hranclies, 6 inches long or more : leaves yellowish, falcate-secund, lanceolate, narrowly acuminate, 

 striate, transvers(dy undulate, bicostate at base, serrulate at the apex : capsule oVate-oblong,' 

 nrcuate-horizontal on a i)e<licel an inch long. — Muse. Exot. t. 108; .'^chwaecr. Supiil. t. 261 

 .Strrrochn rohustm, Mitten, Journ. Linn. Soc. viii. 41. Oregon (//«//, Mohr) ; Kocky Mountains 

 {Drummond) ; also by Mcnzic.i. 



II. PUi,cuF.T,LUM, Dicks. Small, branches erect, scarcely a half-inch long: leaves subfalcate- 

 secund, broadly lanceolate, narrowly attenuate, entire, nerveless, arcolation very narrow : capsule 

 oblong, suberect ; operculum convex-conic : teeth pale yellow ; cilinlre in pairs. — Ent'l. Bot 

 t. 200(3; Wilson, 1. c, t. 'I't ; Berkeley, I. c. fig. 1. LcsKxa jmlr.hrUa, Iledw. Spec. t. 55. '^Plagio- 

 thcciam indchcllum, Brucli k Schimp. 1. c, t. 497. Fort Colville {L>/(dl); Europe. 



II. TURFACEKM, Liiidb. A similar slender species, with depressed-complicate and somewhat 

 folded rather long-acuminate leaves serrate to the miildle and nervrlcss : capsule oblong-cylindric, 

 symmetrical, cermious, .sulcate when dry; ciliola; one or two, long.— Fl. Dan. Suppl t Uj' 

 Fort Colville {Li/cdl) ; Europe. 



H. F.LKOANM, liook. Stems procumbent, ]\ indies long : leaves distichmislv imbricated, ovate, 

 lanceolate, acuminate, nerveless or obscurely 2-nerved at base, serrulate at the apex, arcolation 

 very narrow : capsule iiendiilous upon a short arcuate pedicel, oblong-ovate, nearly symmetri- 

 cal ; operculum broad, abruptly rostellate : ciliola? 3, e(pialliiig the processes.— Muse. E\ot. t. 9 • 

 S.:hwa..rrr. Suppl. t. 282 ; Wilson, 1. c, t. 59 ; Berkeley, 1. c. fig. 2. Vancouver Island {Menzies) ': 

 White Mountains ; (Jreat Britain. 



II. svLVATKUM, Liiui. Ifcsembliiig //. daificidnfum, but stouter and with duller darker 

 green foliage, the leaves less complanate, not acuminate : (lowers direcious : operculum loner-conic 

 -Schwaegr. Supi.l. t. 87; Wilson, Engl. Bot. Suppl. t. 293(5, and I. c, t. 59. Plmjiol.hecium 

 sijh-alicum, Bruch & Schimp, 1. c, t. 503. Oregon {Jlafl) ; White Mountains ; Europe. 



■t- -1- Peristome-teeth remotely jointed ; ciliolce none. 

 II. TRicnoiMroiu'M, Spruce. Resembling //. dcnficii/a/nvr, but more slender : leaves less com- 

 l>lanate and less spieailiiig, sulcate, pilose-a[.ii'ulate : capsule narrower, suberect or erect when 

 dry. — Pldgiolhtcium pilifcvum, Bruch k Schimp. 1, c, t. 49(5. Oregon {Hall) ; Rocky Moun- 

 tains of British America {Drummond) ; Europe. 



* * Creeping, irregnlarbj branched, never atoloniferoiis : leaves dull ov shininrf, 

 spreading orsnbserund,ovat<'.dnnreoJ(ite to lanceolate, costate to above the middle) 

 areolation rather loose, not linear nor Jlexuose : monoecious. — Asiblystegium. 

 {Amblystegium, Schimp.) 



-<- Leaves dull: areolation wholly parenchymatous. 

 32. H. COmpactum, Muell. Stejns slender, mostly erect, an inch long or 

 more, in broad very compact tufts, fasciculately branched : Icmvcs erect-spreacfing, 

 rarely subsecnnd, narrowly ovate-lanceolate and acuminate, slightly serrulate espe- 

 cially toward the base, the stout costa continuous nearly to the apex : areolation nar- 

 rowly rhombic and subllextiose, subcpiadrate at the angles : capsule slightly inclined 

 on au elongated pedicel, oblong with distinct collum, slightly incurved, contracted 



