. 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-LENS 163 Figure for small things. Besides the ordinary elaters, which are so small as to be scarcely recognized, there are a large number of con- spicuous " fixed elaters" that remain attached to the center of the open capsule, appearing like a tuft of brownish hairs. The dark or pur- plish-green thalli frequently cover the ground for several inches. The thallus may reach an inch in legnth by Y-z inch in width at apex,
. 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-LENS 163 Figure for small things. Besides the ordinary elaters, which are so small as to be scarcely recognized, there are a large number of con- spicuous " fixed elaters" that remain attached to the center of the open capsule, appearing like a tuft of brownish hairs. The dark or pur- plish-green thalli frequently cover the ground for several inches. The thallus may reach an inch in legnth by Y-z inch in width at apex, but is usually phylla. Thallus natural ,1 T^ â â 1 J- 1 ^ 1 size showing involucre and smaller. It is simple or dichotomously position of capsule as it ap- branched, with margins sinuate to P«ars in August, irregularly lobed and is nearly always notched at the end. In summer if one looks just back of this notch he will see a little flap covering a little hole into the thallus. In August the young capsule will be found in this hole as a little round dark globule, although the spores are not ripe until the next spring. This little flap is the involucre. There is no perianth, but the calyptra is so large when mature that it might be mistaken for one. Along the center of the thallus may be seen little pim- ples which are the places where the antheridia are produced. These are well illustrated in Fig. go. P. ENDiviAEFOLiA (Dicks.) Dum. and Figure 90. Pellia epi- ?â NeEsiana (Gottsche) Limpr. are phylla (After Hooker) plant; found within our range. Both are calyptra with lower part of ,. , . , . , pedicel; an elater; two dlOlCOUS and have none of the pimple- spores; and two antheridia. [jj^g antheridial dots On the plants bear- ing involucres. In both, the involucres are tubular as shown in Fig. 91. In P. Neesiana the involucres are about yV inch in height and in P. cndiviaefolia about twice as long. In fruit P. cndiviaefolia is distinguished by the fluffy mass of fixed elater
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmosses, bookyear1905
