. Mosses with a hand-lens; a non-technical handbook of the more common and more easily recognized mosses of the north-eastern United States. Mosses. MOSSES WITH A HAND-IENS grow intermingled with the archegonia (difficult for the lens). The capsules mature in May and June, and as the antheridia and archegonia are ripe at about this time, it must take the plant a full year to mature its spores; for this reason the leaves at the base of the seta are often badly torn and decayed. B. BiMUM Schreb., the Red-stemmed Bryum, is another com- mon species, growing on wet cliffs and in swamps. It is known
. Mosses with a hand-lens; a non-technical handbook of the more common and more easily recognized mosses of the north-eastern United States. Mosses. MOSSES WITH A HAND-IENS grow intermingled with the archegonia (difficult for the lens). The capsules mature in May and June, and as the antheridia and archegonia are ripe at about this time, it must take the plant a full year to mature its spores; for this reason the leaves at the base of the seta are often badly torn and decayed. B. BiMUM Schreb., the Red-stemmed Bryum, is another com- mon species, growing on wet cliffs and in swamps. It is known by its large size (2-6 inches) and the dense felt of red-brown radicles that cover its stem. The leaves are rather distant, 1-12 of an inch or more long, plainly bordered, with costa percurrent or excurrent, and red in old leaves. This species is exceedingly variable in size and gen- eral appearance and one who has collected it several times cannot feel sure that he will recognize it the next time he finds it. The spores mature in mid- summer. B. DUVAELi Voit., the Winged Bryum, is a rare plant growing in elevated swamps, but is so peculiar as to be easily recognized even when sterile. The stems are slender and weak with leaves very far apart, much farther than the cut would indicate, and so strongly decurrent as to make the stem appear winged. They are scarcely margined, and the costa is not excurrent. PoHLiA NUTANS (Schreb.) Lindb., the Nodding Byrum, is one of the mosses most frequently sent me for determination. It grows everywhere in moist or swampy places on peaty soil, rotten wood, etc. The plants vary from yi to 2 inches in height, rarely over an inch as I find them. The upper leaves are long and narrowly lanceolate, faintly serrate at apex, and not mar- gined. 'The costa is strong and ends below the apex. With the. Figure 43. Portion of stem of Bryum DuvalHi much enlarged (From Bry. Eur.).. Please note that these images are extracted from scanned page images that may
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmosses, bookyear1905
