. The Bryologist. Mosses; Liverworts; Lichens; Botany; Bryology. Synopsis under the name, Cladonia iitrgida (Ehrli.) Holfm. var. coiispiatci (Schaer.) Nyl. Addit. Fl. Chil. 147. 1S55. The primary thallus is usually wanting, the podetia elongated and sometimes quite squamulose. In closing some explanation of a few expressions used above will be helpful. Our sea-green is a grayish green or perhaps nearer a gray than a green. Single cells or hyphae which are hyaline, when seen collectively as in an hymenium or an hypothecium, are of a whitish color, which we have called pale. Paraphyses of Cladon
. The Bryologist. Mosses; Liverworts; Lichens; Botany; Bryology. Synopsis under the name, Cladonia iitrgida (Ehrli.) Holfm. var. coiispiatci (Schaer.) Nyl. Addit. Fl. Chil. 147. 1S55. The primary thallus is usually wanting, the podetia elongated and sometimes quite squamulose. In closing some explanation of a few expressions used above will be helpful. Our sea-green is a grayish green or perhaps nearer a gray than a green. Single cells or hyphae which are hyaline, when seen collectively as in an hymenium or an hypothecium, are of a whitish color, which we have called pale. Paraphyses of Cladonias are hyaline except at the tips. Even water will sometimes causes the coloring matter of the epithecium to diffuse through the hymenium, especially the upper portion, in sections. To avoid error from this source, sections must be examined as to color the moment after cutting. Fayette, Iowa. HEPATICS LEJEUNEA. William C. T 2 3 4 5 6 Fig. I. Archilejeunea clypeata Fig. 2. A. Sellowiana Fig. 3. Lejeunea Americana Fig. 4. Microlejeunea lucens Fig. 5. M. Ruthii Fig. 6. Colo- lejeunea Jooriana The genus Lejeunea was founded by Libert, and as such was accepted by Spruce and many other writers. If considered as a single genus it is a very large one, and was divided by Spruce into thirty-seven subgenera. Most of these were raised to the rank of genera by Schiffner when, in 1893, he issued the Hepatic part of Engler and Prantl's Natur Pflanzenfamilien. We shall endeavor to adapt from older works a description of the genus which shall cover the composite Lejeunea as covering all these divisions. The descriptions of species are adapted and simplified from the monograph by A. W. Evans, of Yale University, published in Volume VIII., No, 2, Memoirs of the Torrey Botanical Club. Most of the illustrations were redrawn from the same source. Dr. Evans admits to the flora of the United States and Canada twenty-three species, of which about ten occur in the "Gray's Manual
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