. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. are found and are likelyto be referred to Kochii, butthe costa, even in such cases,is much stronger, the cellwalls thicker and the cellsthemselves rather smaller,especially at the basal marginand near it. A. varium ( Hedw.) in mats of varying den-sity, thin and loose to almostcespitose, younger portionslight green, darker below thesurface; stem leaves ratherclose together, loosely erect-spreading, averaging xo.^mni, reaching large plants,


. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. are found and are likelyto be referred to Kochii, butthe costa, even in such cases,is much stronger, the cellwalls thicker and the cellsthemselves rather smaller,especially at the basal marginand near it. A. varium ( Hedw.) in mats of varying den-sity, thin and loose to almostcespitose, younger portionslight green, darker below thesurface; stem leaves ratherclose together, loosely erect-spreading, averaging xo.^mni, reaching large plants, broadly ovateto ovate-lanceolate, narrowedat the insertion and some-what decurrent, rapidly nar-rowed to a long and com-paratively slender acumen,entire or nearly so, slightlyconcave but lying nearly Hatwhen removed entire; costastrong, tapering, reaching theapex or nearly so, rarely stop-ping at base of acumen; leafcells rhomboid-hexagonal, , someii-hat rounded at thefiids, toward the base bccom-ing rectaiigiilcir, siibqitadrate atbasal margins, those near the Figure 173. Ambtystegium Kochii(From Bry. Eur.) Kochii.


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