. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. d, with strongly serrate lamella at back .... sropaiium. 5. Leaves strongly papillose at back, little or not at all secund spurium. Leaves not noticeably papillose (sometimes papillose in pallidum) 6. 6. Capsules clustered •Drummondii. Capsules solitary (rarely two together in Miihleiilnckii) 7. 7. Costa not reaching apex Berg,eri. Costa percurrent or excurrent 8. 8. Lower leaf-cells more or less porose ; capsules not strumose lexcept slightly so in /). pallidum) q. L
. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. d, with strongly serrate lamella at back .... sropaiium. 5. Leaves strongly papillose at back, little or not at all secund spurium. Leaves not noticeably papillose (sometimes papillose in pallidum) 6. 6. Capsules clustered •Drummondii. Capsules solitary (rarely two together in Miihleiilnckii) 7. 7. Costa not reaching apex Berg,eri. Costa percurrent or excurrent 8. 8. Lower leaf-cells more or less porose ; capsules not strumose lexcept slightly so in /). pallidum) q. Leaf-cells not at all porose ; capsules strumose 12. 9. Leaves entire or very faintly denticulate ehngalum. Leaves serrulate 10. 10. Leaves strongly falcate-secund and crispate ; costa \ to • of the width of the leaf at base and forming all of the apex ; upper leaf-cells regular fusct-sciiu. Leaves little or not at all secund ; upper leaf-cells very irregular 11. 11. Costa at least 5 width of leaf at the broadest point of the leaf. Plant 3-to 6high. t,, width of leaf : plants 2 to 3- high PLATE XIV. DtcranoJontium (From Bry. Eur.)Fig. 5. Lowest stcni-Ieat. Figs. 6. 7. and S. Median and upper leaves. Fig. 13. Periclia-tial leaf. 98 MOSSES WITH HAND-LENS AND MICROSCOPE 12. Leaves falcate-secuiui 13. Leaves spreading sehiili. 13. Leaves with distinct ■dngu\aT cells; capsule oblonx-cylindric ^larkei. Leaves with few angular cells; capsule short, obovate falralum. I-).. Costa ending in the serrulate apex ; leaves crisped when dry 1;. Costa excurrent ; leaves scarcely altered by drying (except [). fulztllum and D. fulviim) 16. 15. Apex of leaf papillose at back ; upper leaf-cells rectangular monlaiium. Apex of leaf not papillose ; upper leaf-cells less regular ; plants commonly giving off numerous axillary erect flagella bearing minute ecostate leaves fla^ellare. 16. Costa narrow, to } width of leaf at base 17. Costa broader, i to 2
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