BARNES NORTH AMERICAN MOSSES. 355 



529. Amblystegiumdistantifolium Kindb. Stems irregularly branch- 

 ing, creeping: leaves green, distant, spreading when dry, patent when 

 moist, long oval lanceolate, long cuspidate, not or indistinctly decurrent, 

 sharply serrulate all around, chlorophyllose; cells wide, sub-oblong; costa 

 thick, percurrent or nearly excurrent: barren. Mac. Cat. 222. On rocks, 

 Newfoundland. 



530. Amblystegium dissitifolium Kindb. Tufts compact, sparingly 

 radicant, green, not glossy: leaves very loosely disposed, long decurrent, 

 ovate oblong, short-acuminate, denticulate all around; areolation loose, 

 upper cells narrower, alar larger quadrate and well distinct, as chlorophyl- 

 lose as the other cells; costa percurrent: probably dioicus; only male 

 flowers found. Mac. Cat. 220. On flat limestone rocks which receive 

 dripping water: Canada. 



531. Amblystegium snb-compactnm C. M. &. Kindb. Differs from 

 A. compactum in stems thicker, leaves larger and longer; capsule asym- 

 metric, curved in young state, at least doubly greater. The British Col- 

 umbia specimens have a peculiar habit; tufts are decolorate below, bright 

 green above, and stems erect. Mac. Cat. 221. Growing in thick tufts at 

 the bases of trees around springs and margins of bogs, also on wet 

 rocks: British Columbia and Canada. 



532. Amblystegium riparinm longifolinm Sch. Leaves narrow, lanc- 

 eolate, long and finely acuminate. Husnot, Muse. Gall. 363. Vancouver 

 Island and Washington. 



533. Ainblystegium riparinm serratnm Ren. & Card. Plants slen- 

 der, creeping: leaves narrow, serrulate at apex. Bot. Gaz 14: 98. 1889. 

 Roots of trees: Kansas. 



584. Amblysteginm Floridannni Ren. & Card. Very small, ap- 

 pressed: leaves small, narrowly lanceolate, long acuminate, entire: cap- 

 sules short, arcuate. Bot. Gaz. 14: 98. 1889, as A. riparium, var. 

 Florida: Louisiana. 



535. Amblysteginm Kochii Sch. Closely related to A. riparium: 

 stems depressed, with ascending or erect branches: leaves spreading in all 

 directions; those of large branches cordate-oval or broad oval; those of 

 small branches long acuminate, denticulate, costate for % length, basal 

 cells rectangular; middle sub-hexagonal, much larger than in A. riparium; 

 pedicel long; capsule oval or oblong; annulus simple. Husnot, Muse. 

 Gall. 362. Kansas. 



536. Amblystegium liomalosteginm Jgr. & Sauerb. Monoicous: tufts 

 low, broad, dirty green, rather dense and rigid: stem creeping, pseudo- pin- 

 nate, with many short erect or curved densely aggregate slender simple 

 branches: stem leaves densely imbricate, indistinctly secund, when wet 

 making the stems appear julaceous and turgescent, broadly ovate from a 

 cordate base, short acuminate, concave; margin plane, obsoletely denticu- 



