. Botany for high schools and colleges. Botany. 210 BOTANY. sporangium, which may be distinct (Fig. 144, B), or it may be a flattisb, cake-like mass, the so-called wthaliwn, directly derived from the plasmodium. In most cases the spore- bearing masses contain internally, besides the spores, a structure called the Capillitium, consist- ing of thin-walled, spirally thickened, or otherwise marked tubes variously disposed (Pig. 144, C, cp). In some cases, where there is a distinct sporangium, the pedi- cel of the latter is eontimied into it as a central column ; this is known as the Col- umella ;
. Botany for high schools and colleges. Botany. 210 BOTANY. sporangium, which may be distinct (Fig. 144, B), or it may be a flattisb, cake-like mass, the so-called wthaliwn, directly derived from the plasmodium. In most cases the spore- bearing masses contain internally, besides the spores, a structure called the Capillitium, consist- ing of thin-walled, spirally thickened, or otherwise marked tubes variously disposed (Pig. 144, C, cp). In some cases, where there is a distinct sporangium, the pedi- cel of the latter is eontimied into it as a central column ; this is known as the Col- umella ; it may send out branches which support the walls of the - Swarm- sporesof Cliondrioder- ma diffoime (Didy- mium Liberiianvm of De Bary) coaleeclng or conjugating, x 390.— After Cienkowski. (a) The latest classification of the Myxomycetes is by Eostafinski.* He distinguishes seven or- ders, as follows: Order I. Protodermese. Sporangia simple, of regular shape, not possessed of a capillitium, with violet spores. Order II. Calcarese. Sporangia simple or compound, often pro- vided with a columella, spores violet or violet brown ; whole fructifica- tion, with more or less de- posits of carbonate of lime. This includes many com- mon species, under the genera Physarum, Fuligo, Bidymium, Spumaria, etc. Order III. Amauro- clisetese. Single sporan- gium or sEithalium, with- out lime; spores, capilli- tium, and columella almost always uniformly black, or colored. In this order the genus Stemonitis furnishes the most common species. Order IV. Anemese. Sporangium or BBtlialium without capillitium or lime; columella not evident, wall of sporan- * "Monografia Sluzowce.'" Dr. Joseph Rostafinski, 1875. An Eng- lish translation of so much as pertains to British species may be found in " The Myxomycetes of Great Britain," by M. C. Cooke, 1877. In a. Please note that these images are extracted from scanned page images that may have been digitally
Size: 1368px × 1827px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1885
