APPENDIX. 



DESCRIPTIONS OF SPECIES AND VARIETIES 



published since the issue of Lesquereux and James' Manual of the Mosses of North 

 America in 188!t t and before January 1, 1896. 



1. Sphagnum Bolanderi Warnst. Plants resembling delicate forms of 

 S. fimbriatum: stem leaves small, Ungulate, mostly delicately fimbriate 

 by resorbed cell membranes; border narrow, equal throughout or broader 

 at base: hyaline cells of upper part abundantly fibrillose, with half-elliptic 

 pores along commissures: branches 3 in a fascicle, two divergent, one pen- 

 dent: branch leaves very small, ovate lanceolate, narrowly bordered, apex 

 obtuse and toothed, margins involute, densely imbricate and when dry not 

 shining; hyaline cells fibrillose, inner surface in superior half with single 

 large round pores becoming more numerous in marginal regions, outer 

 surface near apex with medium sized round or semi-elliptic pores gradually 

 increasing in size towards base and arranged along commissures; chloro- 

 phyllose cells exposed on inner side and not on outside, or only occasion- 

 ally. Hedwigia 30: 173. 1891. California. 



2. Sphagnum Russowii Warnst. Plants usually tall and strong; tufts 

 loose and high or compact and low: stem leaves large, broad linguiform, 

 with somewhat undulate margins, only in middle of broad rounded apex 

 dentate or somewhat fimbriate; border much widened below; hyaline cells 

 in upper part of leaf large, broad, rhombic, mostly without cross partitions, 

 but with delicate membrane plaits, all with membrane thinnings, which 

 rarely at edges towards apex change into isolated pores, mostly without 

 fibers and pores but rarely fibrillose near apex: fascicles 4 or 5 branched, 

 distant or crowded; 2 or 3 stouter branches spreading, recurved horizontal, 

 curving upward or erect, longer or shorter; pendent branches very long 

 and closely appressed to stem: branch leaves closely or loosely imbricated, 

 mostly with a somewhat spreading (more rarely nearly squarrose) tip, very 

 seldom almost secund, lanceolate, narrow bordered, the upper margins in- 

 volute, and at the transversely or roundly truncate apex dentate, two or 



251] 



