. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. Figure 203. Amblystegiella aJitata (From Sulliv. Icones! HYPNACEAE 379 Some of the slen-der varieties of Hyp-iium ctipressiforme withnearly symmetricalleaves simulate , but the leafapex in that species isoften serrate, usuallymore slender and theupper leaf cells moreelongated. SUBFAMILY Plants of large orm e d i u m size, noneminute, typically hyp-naceous; leaves notpapillose, often con-cave or plicate or both;casta lacking or shortand double; m
. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. Figure 203. Amblystegiella aJitata (From Sulliv. Icones! HYPNACEAE 379 Some of the slen-der varieties of Hyp-iium ctipressiforme withnearly symmetricalleaves simulate , but the leafapex in that species isoften serrate, usuallymore slender and theupper leaf cells moreelongated. SUBFAMILY Plants of large orm e d i u m size, noneminute, typically hyp-naceous; leaves notpapillose, often con-cave or plicate or both;casta lacking or shortand double; medianleaf cells linear; alarquadrate (in ourforms): seta smooth;capsule erect, stniii^/.u,uol conspicuously coit-Iracled under the mouthwhen dry; peristomewith cilia rudimentarxor wanting, segmentsoften narrow and basalmembrane sometimesnearly lacking. This group has contained a heterogeneous collection of mosses of various relationships, theirassociation being based upon the erect capsule and incomplete peristome. Ihave shown elsewhere that a degeneration of the inner peristome is associatedwith erect capsules even thoug
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