. 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. 32 MOSSES WITH A .HAND-LENS is lateral or terminal, exserted; peristome like that of Dicranum, with sixteen forked, highly colored teeth, which are often papillose above. The- peculiar structure of the leaf has been explained in several ways, but the explanation given by Robert Brown in igig has recently been verified by the studies of Mr. E. S. Salmon. According to this theory the clasping portion of the leaf represents the original leaf, while t
. 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. 32 MOSSES WITH A .HAND-LENS is lateral or terminal, exserted; peristome like that of Dicranum, with sixteen forked, highly colored teeth, which are often papillose above. The- peculiar structure of the leaf has been explained in several ways, but the explanation given by Robert Brown in igig has recently been verified by the studies of Mr. E. S. Salmon. According to this theory the clasping portion of the leaf represents the original leaf, while the rest of the leaf is made up of lamellae, one dorsal arid the other terminal. This theory is strongly confirmed by the fact that these supposed lamellas are wanting in the perigonial leaves and very much reduced in size or wanting in the lower-stem leaves. Moreover, the peristome shows this family to be closely related to the Dicranaceae, in which dorsal lamellae are often strongly developed. The leaves are often bordered, sometimes with a number of elongated cells, much as in Mnium, but, more frequently, with cells of the same shape and size but of a different color; the border is usually too narrow to be distinctly made out with a hand-lens. F. CRISTATUS Wils. is apparently the most common species. It grows on moist soil or stones in shaded places. The sporophyte is lateral and the leaves are margined with a border of lighter cells as shown in the plate of P. adiantoides. (L.) Hedw. can be told from F. cristatus with certainty by the compound microscope alone. The latter species seldom reaches more than an inch and a quarter in height while F. adiantoides may be two or three inches high. Both species mature their spores in winter. F. osMUNDioiDES (Swtz.) Hedw. is one-fourth to two inches in height (rarely twice this) ; leaves not bordered; dioicous; with terminal sporophyte; capsule suberect or inclined; operculum with a needlelike beak nearly as long as the r
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmosses, bookyear1905
