59 
Analytic Keys to the Species of Mosses. 
Stems simple or branched, not dendroid. 
Basilar branches stoloniform. 
Leaves acuminate, serrate to middle, lid convex or 
mamillate, membrane of endostome lacunose M. cuspidatirm, 1. 
Leaves acuminate, serrate to base. 
Lid apiculate . M. medium, 4. 
Lid mammiform ....... M. affine, 7*- 
Leaves rounded at apex, mucronate, lid rostrate . M. rostratum, 6. 
Basilar branches erect, or stems simple. 
Capsule warty-papillose at base •. . . . M. yenustum, 3. 
Capsule smooth at base. 
Perichaetial leaves entire. M. Nevii, 2. 
Perichaetial leaves toothed. 
Leaves nearly entire, not decurrent M. affine, var. rugicum, 7. 
Leaves serrate to base, long decurrent . . M. insigne, 8.. 
Leaves serrate above, entire below. 
Border distinct, yellowish brown . . M. Drummondii, 5. 
Border 0 or faint ..... M. stellare, 16. 
B. Teeth of leaves in pairs. 
Costa vanishing just below apex ..... M. liornum, 9. 
Costa percurrent. 
Capsules solitary. 
Synoicous.jffi. serratum, 10. 
Dioicous. 
Leaf-cells small, about 15 ju 1 . . M. orthorrhynehum, 11. 
Leaf-cells larger (20-30 p ?) 2 . . . M. lycopodioides, 12. 
Leaf-cells very large (50-60 p ?) 3 ... M. umbratile, 13. 
Capsules clustered. 
Dioicous, leaves strongly crispate, capsule horizontal or 
inclined.M. spinosum, 14. 
Synoicous, leaves not crispate, capsule pendent M. spinulosum, 15. 
II. Leaves entire. 
Upper leaf-cells with long diameters oblique to costa. 
Leaves bordered. 
Costate to apex, dioicous, capsule oblong . M. pnnctatum, 18. 
Costa vanishing, synoicous, capsule subglobose M. subglobosum, 19. 
1 Fide Husnot: Muse. Gall. 255, 
2 “ Cellules un peu plus grandes,” Husnot: op. cit., 256. M. riparium Mitt. (M. lyco* 
podioides Bry. Eu., sec. Mitten; M. serratum var. riparium, sec. Husnot, l. c.) has cells 
half as large as M. umbratile Mitt., fide Mitten: Jour. Linn. Soc. viii (1865), 30. 
8 Cells four times as large as M. orthorrhynehum, fide Mitten, l. c. 
