. The Bryologist. Mosses; Liverworts; Lichens; Botany; Bryology. —10— MNIUM FLAGELLARE SULL. AND LESQ. IN NORTH AMERICA R. S. WILLIAMS In a small collection of mosses made by Miss Ruth Mylroie on Kodiak Island, Alaska, in 1911 were found some very interesting specimens of a sterile Mnium that proved to be M. flagellare Sull. & Lesq. The type locality of this species is Hakodadi, Yesso, Japan, where it was collected by Charles Wright in 1855, in connection with the North Pacific Exploring Expedition under John Rodgers, and up to this year it has been known only from Japan and from the regio
. The Bryologist. Mosses; Liverworts; Lichens; Botany; Bryology. —10— MNIUM FLAGELLARE SULL. AND LESQ. IN NORTH AMERICA R. S. WILLIAMS In a small collection of mosses made by Miss Ruth Mylroie on Kodiak Island, Alaska, in 1911 were found some very interesting specimens of a sterile Mnium that proved to be M. flagellare Sull. & Lesq. The type locality of this species is Hakodadi, Yesso, Japan, where it was collected by Charles Wright in 1855, in connection with the North Pacific Exploring Expedition under John Rodgers, and up to this year it has been known only from Japan and from the region of the Amoor or Sachalin River, including Sachalin Island opposite the river's mouth. The plant takes its specific name from the abund- ant flagella, 3 or 4 mm. long, that grow out from around and among the antheridia and archegonia of the terminal flower buds. The Alaska specimens show stems, radiculose below, with oblong elliptic, acute, rather distant and long-decurrent leaves, 2 to mm. long ; leaf border of a double thickness of cells about 2 cells wide and more or less doubly serrate two-thirds down the leaf; costa percurrent, at least in upper leaves and smooth on back; leaf cells, with thin walls» prominently mamillate-papillose on both sides, the median cells about Ml*- or rarely 16/^ in diameter. Brotherus in Engler & Prantl gives only one other species of Mnium, found in China and Japan, having the leaves thus roughened on both Fig. 1. Cross section through middle of leaf of Afwww flagellare X 135^ New York Botanical Garden. HEDWIGIA ALBICANS (WEB.) LINDB. ON LIMESTONE H. S. JEWETT, M. D. Limpricht gives the habitat of this moss as being "on stones and rocks of all kinds {not, however, on limestone^, exceptionally on ; Roth says, "on open-lying as well as shaded stones and rocks, with the exception of ; (Italics mine.) Husnot, and Dixon and Jameson say "on siliceous rocks," Braithwaite, "on rock
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