420 MUSCI. I/ijpnma. 



lanceolate, long-acuminate, subdenticulate at tlie apex, nerveless or obscurely bicostate 

 at base ; quadrate alar cells few or none : flowers dioecious : capsule long-cylindric, 

 subcernuous, curved, with broad compound annulus and obtuse conic or sub- 

 rostellate operculum : ciliok* 2, a little shorter than the processes. — Trans. Amer. 

 Phil. Soc. xiii. 14; Sulliv. & Lesq. Muse. Am.-Bor. Exsicc. 2 ed. n. 476; Sulliv. 

 Icon. Muse. Suppl. 103, t. 79. U.jilumifer, Mitten, Journ. Linn. Soc. viii. 41, t. 7 ] 

 On sliaded rocks in woods, at Oakland and in the Sierra Nevada {Bolander) ; Vancouver Island, 

 Lyall. Mitten's species appear to differ only in the somewhat more narrowly and acutely beaked 

 operculum. 



41. H. circinale, Hook. Stems creeping, slender, 2 to 4 inches long, flexuous, 

 simply pinnate, the numerous branches scarcely h inch long, or sometimes 2 inches 

 long and flexuous : leaves secund, lanceolate with a long-subulate subserrate apex, 

 strongly circinnate, nerveless ; pericha3tial leaves erect ; basal areolation vesicular, 

 yellow : capsule small, ovate upon a broad arcuate collum, horizontal or subpendu- 

 lous ; operculum short-conic : ciliolfe 1 or 2, rather shorter than the processes. — 

 Muse. Exot. t. 107 ; Sulliv. & Lesq. 1. c, n. 474. //. Sequoieti, Muell, in Flora, 

 1875, 91. 



In the Coast Eanges, on redwoods {Bolander) ; at the base of trees, Siskiyou Mountains 

 {Brewer) ; Washington Territory {Pickering) ; Vancouver Island, Lyall, Menzics. 



* * * Stem prost7'ate and ascending, irregularhj hranched : leaves secund or 

 spreaditif/ everyway, broadly ovate to lony -lanceolate, shortly or ohsoletely 1-2- 

 costate, areolation very narrowly linear. — Limnobium. 



42. H. arcticum, Sommerf. Branches elongated, crowded, simple, rigid, obtuse, 

 1 or 2 inches lung or more : leaves reddish or yellowish brown, widely spreading, 

 roundish, subacute or obtuse, entire, bicostate to the middle, areolation not dilated 

 at the angles : flowers monoecious : capsule suberect or cernuous, oval upon a dis- 

 tinct narrow collum, arcuate when dry ; annulus double ; operculum short-conic, 

 acute : ciliolse short. — Wahl. El. Lapp. Suppl. t. 2 ; Eruch & Scliimp. 1. c, t. 578 ; 

 Wilson, 1. c, t. 56 ; Berkeley, Brit. Moss. t. 7, fig. 3. 



On Mount Dana, in streams, submei-ged {Bolander) ; Oregon {Hall) ; Eocky Mountains of 

 British America {Drummond) ; Eurojje. 



H. ElTGYiilUM, Schinip. Leaves broadly ovate- to oblong-lanceolate, shortly acuminate, sub- 

 falcate-secund, more or less complicate and contorted, shortly bicostate, the alar areolation large, 

 pellucid and yellow : flowers monoecious : capsule ovate-oblong, cernuous-incuived ; annulus very 

 broad: ciliolse nodose. — Sulliv. & Lesq. 1. c, n. 303 (2 ed. n. 450). Liiaaobium eiufijrium, 

 Bruch & Schimp. 1. c, t. 579. Oregon {Hall) ; in the Alleghanies and White Mountains ; also 

 in Europe. 



H. OCHRACEUM, Turner. Stem and branches elongated : leaves falcate-secund, ovate- to 

 elongated oblong-lanceolate, short- or long-acuminate, more or less contorted, striate, costa single 

 or forked, reaching to the middle ; perich;etium squarrose : flowers dioecious : capsule ovate or 

 oblong, arcuate upon an erect attenuate collum ; annulus broad, triple : ciliolae very slender. — 

 Wilson, 1. c, t. 58 ; Sulliv. & Lesci. 1. c, n. 30.5. Limnobium ochraceum, Bruch k Schimp. 

 I. c, t. 580. Oregon {Hall) ; White Mountains ; Europe. 



* * ■/: * Stems pinnately or bipinnately branched: leaves shining, ovnte-cordate 

 to oblong, spreading every way or rarely secund, shortly costate : dicucious. — 



HyLOCOiMIUM. 



H. SPLENDENS, Hedw. Stems 2 to 6 inches long, interruptedly 2-3-pinnate, villous : stem- 

 leaves broadly ovate-oblong, cirrhose-acuniinate, concave, serrulate, margin below recurved, bi- 

 costate at base : capsule ovate, cernuous, curved ; operculum with slender acute beak. — Sjjec. 

 t. 67 ; Engl. Bot. t. 1424. Hijloeomimn splendeus, Scliimp. Bryol. Eur. t. 487. Oregon {Pick- 

 ering, Newherrtj, Hall) ; Vancouver Island {Lyall, Wood) ; Atlaiitic States and Europe. 



H. TRIQUETRUM, Liuu. Stem erect, 6 inches high or more, rigid, subpinnate, with drooping 

 branches an inch long : leaves squarrose, triangular-acuminate from a coidate clasping base, 

 plicate-striate and bicostate to the middle, serrulate above : capsule roundish ovate, gibbous, 

 cernuous; annulus simple; operculum eonic-mamillate. — Engl. Bot. t. 1622. HylocomiiniL 

 triquetrum, Schimp. 1. c, t. 491. 



Cascade Mountains, Oregon {Newberry) ; Columbia River {Hall) ; Europe. 



