354 BULLETIN OP THE UNIVERSITY OF WISCONSIN. 



525. Ambljste^riiiin Jiiratzkanum 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; perichtetial leaves less abruptly 

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

 According to Husnot this species differs from ^4. 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. 



52(>. Amblystegiuin 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 middles cells of basal angles rectangular, forming small 

 auricles, middle cells linear -rhomboidal; internal perichsetial 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. Amblysteg'ium porphyrrhizou Lindb.— Monoicous: slender, in 

 habit between small forms of A. rii^arium and A. serj^ens; 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: perichtetial 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 areoiate: annulus? Schimp. Syn. 

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

 Miquelon Is. 



628. Amblystegiiim 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, 

 Bolitaj-y. Bot. Centralbl. 44: 423. 1890.— Yellowstone Park, Wyoming. 



