. The microscope and its revelations. of four by the binary subdivision of themother-cells which first differentiate themselves from those formingthe capsule itself. The capsule and seta of mosses together consti-tute the organ known as the sporoyonp. The development of the spore into a new plant commences withthe rupture of its firm yellowish-brown outer coat or , andthe protrusion of its cell-wall proper, or eiulosporc, from theprojecting extremity of which new cells are put forth by a processof outgrowth, forming a sort, of confervoid filament known as the/>,-»/i/f>ti>. At
. The microscope and its revelations. of four by the binary subdivision of themother-cells which first differentiate themselves from those formingthe capsule itself. The capsule and seta of mosses together consti-tute the organ known as the sporoyonp. The development of the spore into a new plant commences withthe rupture of its firm yellowish-brown outer coat or , andthe protrusion of its cell-wall proper, or eiulosporc, from theprojecting extremity of which new cells are put forth by a processof outgrowth, forming a sort, of confervoid filament known as the/>,-»/i/f>ti>. At certain points of this filament its component cellsmultiply by subdivision, so as to form rounded clusters or buds, fromc\er\ one of which an independent plant may arise. The Musci,therefore, present an example of the phenomenon known as alter-nation ,,f </<n<r<itin,tx. The life history of each individual may be divided into two generations: the s&ewaZ generation or • oophvte, SPORANGE OF MOSSES 673. which consists of the leafy pLmt bearing the male and female organs ;and the non-sexual generation or sporophyte, composed of thesporogone with its spores, these two generations alternating with oneanother in the complete cycle of development. The tribe of Sphagnacece, or bog-mosses, is now separated bymuscologists from true mosses mi account of the marked differencesby which they are distinguished, the three groups, lL:>j>nti<mw is more dis-tinctly differentiated than that oflirt/acfd into the central or medullary,the outer or cortical, and the inter-mediate or woody portions: and a veryrapid passage of fluid takes placethrough its elongated cells, especiallyin the medullary and cortical ,, .sothat if one of the plants be placed dryin a flask of water, with its rosetteof leaves bent downwards, the waterwill speedily drop from this un
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
