. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. by Miss Cora H. Clarke. The ° shown at apex. e. Portion of leaf of , I J I I I / same showing papilla; at back x lOO. h. leaves are elongated lanceolate, long and narrowly D. pallidum, c and c. Broad and narrowacuminate, smooth or slightly papillose on the •^^^^^ f ^>me; leaf-cells x above; costa slightly roughened at back, capsule slightlv strumose; sporesmaturing in spring. The difference between this ;uul the last is hard to indicate in a descrip-tion.
. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. by Miss Cora H. Clarke. The ° shown at apex. e. Portion of leaf of , I J I I I / same showing papilla; at back x lOO. h. leaves are elongated lanceolate, long and narrowly D. pallidum, c and c. Broad and narrowacuminate, smooth or slightly papillose on the •^^^^^ f ^>me; leaf-cells x above; costa slightly roughened at back, capsule slightlv strumose; sporesmaturing in spring. The difference between this ;uul the last is hard to indicate in a descrip-tion. The smaller size, more compact tufts, ferruginous below, narrower leavessmoother at back, are the most evident distinctions. Specimens and descrip-tions lead me to believe that the European spuriuin is intermediate between ourspuiium and pallidum. The compact tufts may lead the beginner to confuse thisspecies with D. Milhlenbeckii, but the difference in size and the more stronglyporose cell-walls in this species will usually be sufficient to identify it. D. undulatum Ehrh. \ery robust, y to 250 high, often decumbent at. FiGlRE 45 I04 MOSSKS WITH HAND-LENS AND MICROSCOPK base; growing in loose wide tufts, densely radiculose, bright glossy yellow-green; hlives iDuiiilalc, ivith ii silky liislrr, very long, lanceolate, gradually nar-rowed, scarcely se-cund, margin recursedbelow for < to _-the length of the leaf,above this stronglyserrate to apex; costacomparatively narrow,with izvo strongly sen alelamella on I he backa hove; alar cells dis-tinctly marked, othercells elongated andporose throughout;capsules cliislered (sev-eral setae from thesame perichastium);seta? long, reddish;capsule cernuous andarcuate, striate whenempty; spores matur-ing in late summer. Our largest species,common in shadedplaces on soil andstones covered withhumus, but not fruit-ing freely. The onlyspecies with which itcould possibly be con-fused is the next. D. DrummondiiMuell. is most
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