. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. eaves smaller, more strongly papillose, papillas some-times subcentral, margins dentate-serrate. New York and westward. (Fig. 131,and Plates LII and LIII.) * * Medium-sized species simply and regularly piiinnle. T. sctum (Beauv.) Aust. This neat trim moss grows in mats on the rootsand bases of trees. Stem leaves broadly triangular, auriculo-cordate, narrowlyacuminate; branch leaves broadly ovate-acuminate; median leaf cells roundish-hexagonal wilh 2 to 5 small head-li
. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. eaves smaller, more strongly papillose, papillas some-times subcentral, margins dentate-serrate. New York and westward. (Fig. 131,and Plates LII and LIII.) * * Medium-sized species simply and regularly piiinnle. T. sctum (Beauv.) Aust. This neat trim moss grows in mats on the rootsand bases of trees. Stem leaves broadly triangular, auriculo-cordate, narrowlyacuminate; branch leaves broadly ovate-acuminate; median leaf cells roundish-hexagonal wilh 2 to 5 small head-like papillae on each surface; monoicous; capsulecylindrical, 5/rrt/^^/)/, or /;((/ sligblly curved; operculum conic-rostrate; spores ma-turing in autumn and winter. Var. astivale (Aust.) Best; stems not so closelypinnate; capsule oblong-cylindrical, inclined to horizontal; operculum shorterbeaked. From Canada to North Carolina and from \ermont to Wisconsin.(Fig. 133.) T. Virginianum (Brid.) Lindb. (7*. gracile var. Lancastriense S. & L.). Plantssmall, dark or dirty green, in open woods on the ground or about stumps and. EL HYATT Del. PLATE LIV. Thiiidium Iirginianum. (From the Bulletin of theTorrey Botanical Club, by permission.! LESKEACEAE 245 roots of trees; stem leaves roundish ovate, abruptly acuminate (Fig. 129); costa van-ishing in the acumen; erose-dentate below, serrate above; leaf cells oblong-quadrate to hexagonal witb a single papilla; acumen of the branch leaves short,broad, sharply serrate ; median leaf cells quadrate-hexagonal; monoicous ; cap-sule cylindrical, curved; operculum short beaked, obtuse; spores maturing inspring. From Massachusetts to Minnesota, south to Mexico. This is readilydistinguished from the preceding by the unipapillate leaf cells and curved cap-sules, and from the next by the shape of the stem leaves (Figs. 122, 129, andPlate LIV). T. microphyllum (Sw.) Best. (T. gracile Br. & Sch.). Plants of mediumsize, pale green, becoming yellowish. Stem
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