Htjimum. MUSCI. 417 



(an inch long from the base of the branches) ; opercuhim acute-conic : teeth reddisli 

 brown, the solitary ciUolse as long. — Hedw. Muse. Frond, iv. 81, t. 31 ; Engl. But. 

 t. 12G0 ; Wilson, 1. c, t. 2i ; Berkeley, 1. c, t. 12, tig. 2. Playiotkecium denticula- 

 tuvi, Bruch & Schimp. 1. c, t. 501. 



In tlie Coast liaiigcs, Meiulocino City, and on redwood trees in Jackson Valk'y (Lo/andcr) ; 

 Fort Colville (Li/a//) ; in the White Mountains and Europe. 



31. H. undulatum, Linn. Procumbent, sometimes 6 inches long or more, the 

 usually simple liranchL's 2 inches long or more : leaves whitish, crowded, ovate, 

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

 bicostate, areolation very narrow : flowers dioecious : capsule subcylindric upon a 

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

 or rostellate : teeth yellowish ; ciliolte 3, slightly shorter. — Schwaegr. Suppl. t. 282; 

 Wilson, 1. c. ; Berkeley, 1. c, tig. 4. Flagiothedmn undulatum, Bruch & Schimp. 

 1. c, t. 50G. 



Swamps near the coast, Mendocino C owniy {Bolnndcr) ; Ovegon {Newheirij) ; Fort Nisqually 

 {Pickering) ; Fort Colville (LijaU) ; Europe. 



H. ROBUSTUM, Hook. Stem creeping, with very stout decumbent densely leafy broad flattened 

 branches, 6 inches long or more : leaves yellowish, lalcate-secnnd, lanceolate, narrowly acuminate, 

 striate, transversely undulate, bicostate at base, serrulate at the apex : ca])sule ovate-oblong, 

 arcuate-horizontal on a pedicel an inch long. — Muse. Exot. t. 108; Schwaegr. Supjtl. t. 261. 

 Stcreodon robustus, Mitten, Journ. Linn. Soc. viii. 41. Oregon {Hall, Mohr) ; Rocky Mountains 

 {Bnanmond) ; also by Memies. 



H. PULCHRLLUM, Dicks. Small, branches erect, scarcely a half-inch long: leaves subfalcate- 

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

 oblong, snberect ; operculum convex-conic : teeth pale yellow ; ciliolre in pairs. — Engl. Bot. 

 t. 2006; Wilson, 1. c, t. 25 ; Berkeley, 1. c. fig. 1. Lcskca pulchdla, Hedw. Spec. t. 55. Flagio- 

 thcciam 2nUchellum, Bruch & Schimp. 1. c, t. 497. Fort Colville {Lijall); Europe. 



H. TURFACEIJM, Lindb. A similar slender species, with depressed-com plicate and somewhat 

 folded rather long-acuminate leaves serrate to the niiddh^ and nerveless : capsule oblong-cylin.lric, 

 symmetrical, cernuous, sulcate when dry; cilioldi one or two, long. — Fl. Dan. Suppl. t. 117. 

 Fort Colville (Li/cdl) ; Europe. 



H. ELEGANS, Hook. Stems procumbent, 1| inches long : leaves distichously imbricated, ovate- 

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

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

 cal ; operculum broad, abruptly rostellate : ciliolte 3, equalling the processes. — Muse. Exot. t. 9 ; 

 Schwaegr. Suppl. t. 282 ; Wilson, 1. c., t. 59 ; Berkeley, 1. c. tig. 2. Vancouver Island (J/eit::ies) ; 

 White Mountains ; Great Britain. 



H. SYLVATICUM, Liun. Resembling H. denticulatum, but stouter and with duller darker 

 green foliage, the leaves less complanate, not acuminate : Howers dicecious : operculum long-conic. 

 — Schwaegr. Suppl. t. 87; Wilson, Engl. Bot. Suppl. t. 2936, and 1. c, t. 59. r/<"jiothcciitm 

 syloaLimm, Bruch & Schunp. 1. c, t. 503. Oregon {Hall) ; White Mountains ; Eujope. 



H— -I- Per'istome-teeth remotely jointed ,' cilioUe none. 



H. TEICHOPHORUM, Spruce. Resembling //. denticulatum, but more slender : leaves less com- 

 planate and less spreading, sulcate, pilose-apiculate : capsule narrower, suberect or erect when 

 dry. — Plagiothccium piliferum, Bruch & Schimp. 1. c, t. 496. Oregon {Hall) ; Rocky Moun- 

 tains of British America {Drmnmond) ; Europe. 

 * * Creeping, irregularly branched, never sfolojiifcrous : leaves dull or sltining, 



spreading or subsecund,ovate-l(ninnhitr to hi in-enhife, rostafe to above the middle; 



areolation rather loose, not linear nor ^fle.riiuse : inona'cious. — Ajiblystegium. 



{Amblystegium, Schimp. ) 



•<- Leaves dull: areolation wholly parenchymatous. 



32. H. compactum, INIuell. Stems slender, mostly erect, an inch long or 

 more, in broad very compact tufts, fasciculately branched : leaves erect-spreading, 

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

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

 rowly rhombic and subtlexuose, subquadrate at the angles : capsule slightly inclined 

 on an elongated pedicel, oblong with distinct collum, sliglitly incurved, contracteil 



