354 BULLETIN OF THE UNIVERSITY OF WISCONSIN. 



525. Amblystegium Juratzkanum Sch. Closely related to A. ser- 

 pens, but generally more robust: tufts dark olive green: leaves spreading; 

 stem leaves distant, cordate-oval, short acuminate; branch leaves oval- 

 lanceolate, longer acuminate, entire or denticulate; costa longer, reaching 

 % length of leaf, cells larger, sometimes smaller, very chlorophyllose, basal 

 rectangular, middle sub-rhomboidal; perichaetial leaves less abruptly 

 acuminate, costate and plicate: monoicous. Husnot, Muse. Gall. 358. 

 According to Husnot this species differs from A. hygrophilum in dark 

 green color, leaves longer acuminate, longer costate and cells larger. On 

 dead wood, stones, and bases of trees in damp woods: Ottawa and Owen 

 Sound, Ont.; Revelstoke, B. C. 



526. Amblystegium hygrophilum Sch. Monoicous: stems 3-5 cm., de- 

 pressed, delicate; branches erect or ascending: tufts pale or yellowish 

 green: leaves spreading in all directions, or squarrose, small stem leaves 

 cordate-oval, branch leaves oval, long acuminate, entire; costa weak, van- 

 ishing near middle! cells of basal angles rectangular, forming small 

 auricles, middle cells linear -rhomboidal; internal perichaetial leaves oblong- 

 lanceolate, long and finely acuminate, costate, entire: capsule sub-horizon- 

 tal, oblong-cylindric, strongly arcuate when empty, contracted below 

 mouth; lid conic; annulus very large. Husnot, Muse. Gall. 358. Indi- 

 ana; Illinois; Wisconsin. 



527. Amblystegium porphyrrhizon Lindb. Monoicous: slender, in 

 habit between small forms of A. rlparium and A.serpens; stem leaves 

 rather remote, sub-squarrose-spreading, from deltoid-ovate to lanceolate 

 ovate, slender, pale, excavate at the slightly decurrent angles; costa slen- 

 der, yellowish, vanishing beyond middle; margin below obsoletely serru- 

 late; cells narrowly oval-hexagonal, hyaline, quadrate loose and yellowish 

 at angles: male fls. numerous, small, polyphyllous; leaves imbricate, short 

 lanceolate, erect, from an ovate concave base; antheridia few; female fls. 

 slender, sub-incurved: perichaetial branch strongly radicant; inner leaves 

 erect, imbricate, long lanceolate, subulate-acuminate; costa slender, yellow- 

 ish, vanishing toward base and apex; margin faintly serrulate; cells very nar- 

 row, vermicular: capsule oblique, oblong-cylindric, cylindric when dry and 

 deoperculate, sub-arcuate, constricted below mouth, yellow-fuscescent, 

 thin walled, loosely and irregularly areolate; annulus? Schimp. Syn. 

 715. 1876. Kansas; Canada: N. W. Terr.; Rocky Mts.; British Columbia, 

 Miquelon Is. 



628. Amblystegium Schlotthaueri Ren. & Card. Sub-species of A. 

 serpens: similar in habit to compact form of A. serpens but differs in 

 pedicel thicker, strongly twisted to right; capsule erect, slightly curved, 

 ovoid, mouth dilated, collum elongate, plicate; cilia of endostome shorter, 

 solitary. Bot. Centralbl. 44: 423. 1890. Yellowstone Park, Wyoming. 



