^1Q MUSCI. Hijimum. 



base, costate to above the middle ; periclisetial leaves squarrose : capsule horizontal, 

 oblong and subcylindrical, contracted below the throat when dry : teeth orange ; 

 processes yellow, dehiscent ; ciliolye 1 or 2, a half shorter. — Muse. Hib. 1. 15, fig. 2 ; 

 Fl. Dan. t. 2562, fig. 2 ; Sulliv. & Lesq. :Musc. Am.-Bor. Exsicc. 2 ed. n. 433. 

 Eurhynchium Stokesii, Bruch k Schimp. 1. c, t, 526. 



On shaded ground aud rocks, common {Btgclow, Bolander) ; Vancouver Island {Lyall, Wood) ; 

 Europe. 



27. H. Oreganum, Sulliv. A'ery near the last, but larger and more robust, the 

 creeping stems 6 to 12 inches long or more, once or twice divided, regularly and 

 closely pinnated : leaves thinner and firmer, the areolatiou longer and narrower ; 

 perichsetial leaves reflexed. — jNIem. Amer. Acad. n. ser. iv. 172, and Muse. Wilkes 

 Exp. 16, t. 13, B; Sulliv. & Lesq. 1. c, n. 434. 



On decaying logs or on the ground in forests {Biyelow, Brewer, Bolander) ; Puget Sound {Pkl- 

 eriny) ; Vancouver Island, U'uud. 



28. H, COlpophyllum, Sulliv. Of similar habit, rather small : leaves scarious, 

 very concave, spreading, ovate, very shortly acuminate, margin flat, serrulate, costa 

 slender, the dentate tip excurrent above the middle, areolation very narrowly hex- 

 agonal-rhombic ; perich£etial leaves oblong-lanceolate, long-acuminate, nerveless, 

 spreading above : capsule oblong-cylindric, cernuous, slightly curved, twice longer 

 than the straight stout-beaked operculum : ciliola? 2, equalling the teeth. — Eurhyu- 

 cliium colpophyllnm, Sulliv. Icon. Muse. Suppl. 95, t. 71. 



California, Bigclow. 



•)- -^ Ramificntion fascicled and someiuhat dendroid: leaves complanate : areo- 

 lation qtLadrate-rhomhic above, narrowly oblong beloiv : pedicels smooth.— 

 Thamxium. {Tliamnium, Schimp.) 



29. H. Bigelovii, Sulliv. Secondary stems arcuate-ascending, subfasciculately 

 branched, 1 to U inches high, rather stitf, in close mats: leaves bright green, 

 spreading in two ranks, long-oblong, shortly acuminate, coarsely serrate above, mar- 

 gin inflexed on one side, costa ceasing below the apex ; perichaetial leaves lanceolate, 

 linear-acuminate and serrate, suberect : flowers dioecious : capsule oblong-oval, in- 

 clined, with distinct collum, a little exceeding the straightish operculum : cilioli^e 

 in pairs, strongly appendiculate, nearly equalling the processes. — Pacif. E. Eep. iv. 

 189, t. 8; SuiUv. & Lesip 1. c, n. 423. 



In valleys of the Coast Ranges north of the bay of San Francisco, on shaded rocks, Bkjeloic, 

 Breicer, Bolander. 



H. Ai.LEGHANlEXSE, Muell. Larger, 2 or 3 inches high ; leaves less distinctly complanate, 

 ovate-oblong, more concave, obtusish, coarsely seiTate, costa dentate on the back : flowers bisexual 

 or monoecious : operculum more obli({ue. — Sulliv. Icon. Muse. 161, t. 103 ; Sulliv. & Lesq. 1. c, 

 n. 288. Thainnium Alleghaniense, Bruch & Schimp. //. neckeroides, Mitt, in Journ. Linn. 8oc. 

 viii. 38, not Hook. Vancouver Island ( Wood) and Atlantic States. 



§ 3. Leaves smooth, mostly complanate or more or less secund, often shortly cos- 

 tate, bicostate, or nerveless : areolation mostly elongated rhombic : pedicels 

 smooth : opercidiim convex-conic. 

 * Irrpgxdarly and sparingly branched, stolon if eroiis : leo,ves shining, thin, dts- 

 tichously complanate, ovate or ovate-lanceolate, nerveless or shortly bicostate, 

 usually entire ; ai^eolation narrowly rhombic-hexagonal: mostly moncecious. — 

 Plagiothecium. {Plagiothecium, Schimp.) 



■^ Peristome-teeth closely jointed ; cilioloi present. 

 30. H. denticulatum, Linn. Stems prostrate, 2 or 3 inches long, with erect 

 subfasciculate branches : leaves light green and glossy, obliquely ovate, short-acumi- 

 nate, concave with margin recurved below, bicostate at base ; areolation long-rhombic, 

 quadrate at the angles : capsule arcuate-oblong or -cylindric, on a red curved pedicel 



