I 
Analytic Keys to the Species of Mosses. 
2. Chlorophyllose cells on dorsal face of leaf; hyaline cells most convex 
on ventral face. 
a. Cortex of stem distinct. 
Stem leaves very broad above and strongly fimbriate 
Stem leaves broadest below. 
Branch leaves with narrow border 
Branch leaves with broad border .... 
Branch leaves not bordered. 
S. Lindbergii, 7- 
S. tenelliun, 18. 
S. cuspidatum, 5. 
S. Garberi, 14. 
b. Cortex of two layers of small cells , indistinct , 
or wanting . S. intermedium, 6. 
B. Chlorophyllose cells exposed on both faces or included , elliptic in 
transverse section. 
1. Free on both faces. 
Cortex consisting of one layer of ceils. 
Branch leaves ovate-acuminate . . . . S. subsecundum, 15. 
Branch leaves round ovate.S. cyclopliyllum, 23. 
Cortex of more than one layer of cells. 
Stem leaves large, rounded and fimbriate at apex, with 
narrow border below. 
Branch leaves large, strongly squarrose . . S. squarrosum, 8. 
Branch leaves smaller, slightly squarrose at tips . . $. teres, 9. 
Stem leaves small, with broad border below . . S. laricinum, 16. 
[S. Wulfianum may be sought here.] 
2. Included. 
Branches in fascicles of 7 —12.S. Wulfianum, 10. 
Branches in fascicles of 3 — 5. 
Cortex of 2 or 3 layers, with few small pores or none . S. rigidum, 11. 
Cortex of 4 or 5 layers, pores numerous . . S. medium, Limpr. 1 . 
II. Branches uniform, solitary or in pairs; hyaline cells fibrillose; cortical 
cells usually in one layer, without pores. 
Stem and branch leaves alike, broadly obtuse, entire or 
erose at apex.S. Pylsesii, 26. 
Stem leaves oblong or obovate, branch leaves narrow, 
linear oblong.S. Fitzgeraldi, 25. 
1 Cardot: 1. c., p. 5. 
