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| Keywords: bookid:structuredevelop00camp3 bookidstructuredevelop00camp3 bookyear:1918 bookyear1918 bookdecade:1910 bookdecade1910 bookcentury:1900 bookcentury1900 bookauthor:campbell__douglas_houghton__1859_1953 bookauthorcampbelldouglashoughton18591953 bookpublisher:new_york__macmillan bookpublishernewyorkmacmillan bookcontributor:the_luesther_t_mertz_library__the_new_york_botanical_garden bookcontributortheluesthertmertzlibrarythenewyorkbotanicalgarden booksponsor:the_luesther_t_mertz_library__the_new_york_botanical_garden booksponsortheluesthertmertzlibrarythenewyorkbotanicalgarden bookleafnumber:236 bookleafnumber236 bookcollection:biodiversity bookcollectionbiodiversity bookcollection:ny_botanical_garden bookcollectionnybotanicalgarden bookcollection:americana bookcollectionamericana bhl collection bhlcollection bhl consortium bhlconsortium drawing sketch cartoon round monochrome circle bookid:structuredevelop00camp3 bookidstructuredevelop00camp3 bookyear:1918 bookyear1918 bookdecade:1910 bookdecade1910 bookcentury:1900 bookcentury1900 bookauthor:campbell__douglas_houghton__1859_1953 bookauthorcampbelldouglashoughton18591953 bookpublisher:new_york__macmillan bookpublishernewyorkmacmillan bookcontributor:the_luesther_t_mertz_library__the_new_york_botanical_garden bookcontributortheluesthertmertzlibrarythenewyorkbotanicalgarden booksponsor:the_luesther_t_mertz_library__the_new_york_botanical_garden booksponsortheluesthertmertzlibrarythenewyorkbotanicalgarden bookleafnumber:236 bookleafnumber236 bookcollection:biodiversity bookcollectionbiodiversity bookcollection:ny_botanical_garden bookcollectionnybotanicalgarden bookcollection:americana bookcollectionamericana bhl collection bhlcollection bhl consortium bhlconsortium drawing sketch cartoon round monochrome circle Identifier: structuredevelop00camp3 Title: The structure and development of mosses and ferns (Archegoniatae) Year: 1918 (1910s) Authors: Campbell, Douglas Houghton, 1859-1953 Subjects: Publisher: New York, Macmillan Contributing Library: The LuEsther T Mertz Library, the New York Botanical Garden Digitizing Sponsor: The LuEsther T Mertz Library, the New York Botanical Garden View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: inder; andvery much larger, thin-walled cells, appearing almost destituteof protoplasmic contents, and closely resembling the vessels oftrue vascular plants, and like them, no doubt, true water-con-ducting organs. Traversing the ground tissue are slenderstrands of elongated cells—leaf-traces, which are structurallylike the central cylinder of the shoot, but with the water-conducting cells less conspicuous. Most of the cells in thestem of Dawsonia, except the large tracheary cells of the centralcylinder, contain starch, which it is stated by Goebel (8) is notabundant in the tissues of Polytrichum, where its place is takenlargely by oil. Starch has been noted in Polytrichum in theouter cells of the stem and in the leaf-traces. The leaf-traces, or continuation of the central tissue of themidribs of the leaves, bend down into the stem, and finallyunite with the axial cylinder of the latter, in a mannerquite analogous to that found in the stems of many vascularplants. VI. THE BRYALES 223 Text Appearing After Image: Bastit ((i), p. 295),who has made a compar-ative study of the subter-ranean and aerial stems ofP. jimiperiniim, dividesthe outer tissue of the lat-ter into epidermis, hypo-derma, and cortex. Inthe subterranean stems hefinds the constructionquite different from thatof the leafv branches.The section of the formeris triangular, and its epi-dermis provided withhairs which are absentfrom the epidermis of theaerial parts. Rudimen-tary scales, arranged inthree rows, are present,and corresponding tothese are strands of tissuethat represent the leaf-traces of the aerial stems.The central cylinder ismuch larger relativelythan in the leafy branches,and its cross-section is notcontinuous, but is inter-rupted by three pericyclicsectors, composed ofcells whose walls are butlittle thickened. Thepoint of each sector is atthe periphery of the me-dulla, or central cylinder,and the broad end towardthe centre. As might beexpected, intermediate con-ditions are found wherethe rhizome begins to grow upward Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work. Identifier: structuredevelop00camp3 Title: The structure and development of mosses and ferns (Archegoniatae) Year: 1918 (1910s) Authors: Campbell, Douglas Houghton, 1859-1953 Subjects: Publisher: New York, Macmillan Contributing Library: The LuEsther T Mertz Library, the New York Botanical Garden Digitizing Sponsor: The LuEsther T Mertz Library, the New York Botanical Garden View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: inder; andvery much larger, thin-walled cells, appearing almost destituteof protoplasmic contents, and closely resembling the vessels oftrue vascular plants, and like them, no doubt, true water-con-ducting organs. Traversing the ground tissue are slenderstrands of elongated cells—leaf-traces, which are structurallylike the central cylinder of the shoot, but with the water-conducting cells less conspicuous. Most of the cells in thestem of Dawsonia, except the large tracheary cells of the centralcylinder, contain starch, which it is stated by Goebel (8) is notabundant in the tissues of Polytrichum, where its place is takenlargely by oil. Starch has been noted in Polytrichum in theouter cells of the stem and in the leaf-traces. The leaf-traces, or continuation of the central tissue of themidribs of the leaves, bend down into the stem, and finallyunite with the axial cylinder of the latter, in a mannerquite analogous to that found in the stems of many vascularplants. VI. THE BRYALES 223 Text Appearing After Image: Bastit ((i), p. 295),who has made a compar-ative study of the subter-ranean and aerial stems ofP. jimiperiniim, dividesthe outer tissue of the lat-ter into epidermis, hypo-derma, and cortex. Inthe subterranean stems hefinds the constructionquite different from thatof the leafv branches.The section of the formeris triangular, and its epi-dermis provided withhairs which are absentfrom the epidermis of theaerial parts. Rudimen-tary scales, arranged inthree rows, are present,and corresponding tothese are strands of tissuethat represent the leaf-traces of the aerial stems.The central cylinder ismuch larger relativelythan in the leafy branches,and its cross-section is notcontinuous, but is inter-rupted by three pericyclicsectors, composed ofcells whose walls are butlittle thickened. Thepoint of each sector is atthe periphery of the me-dulla, or central cylinder,and the broad end towardthe centre. As might beexpected, intermediate con-ditions are found wherethe rhizome begins to grow upward Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work. Identifier: structuredevelop00camp3 Title: The structure and development of mosses and ferns (Archegoniatae) Year: 1918 (1910s) Authors: Campbell, Douglas Houghton, 1859-1953 Subjects: Publisher: New York, Macmillan Contributing Library: The LuEsther T Mertz Library, the New York Botanical Garden Digitizing Sponsor: The LuEsther T Mertz Library, the New York Botanical Garden View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: inder; andvery much larger, thin-walled cells, appearing almost destituteof protoplasmic contents, and closely resembling the vessels oftrue vascular plants, and like them, no doubt, true water-con-ducting organs. Traversing the ground tissue are slenderstrands of elongated cells—leaf-traces, which are structurallylike the central cylinder of the shoot, but with the water-conducting cells less conspicuous. Most of the cells in thestem of Dawsonia, except the large tracheary cells of the centralcylinder, contain starch, which it is stated by Goebel (8) is notabundant in the tissues of Polytrichum, where its place is takenlargely by oil. Starch has been noted in Polytrichum in theouter cells of the stem and in the leaf-traces. The leaf-traces, or continuation of the central tissue of themidribs of the leaves, bend down into the stem, and finallyunite with the axial cylinder of the latter, in a mannerquite analogous to that found in the stems of many vascularplants. VI. THE BRYALES 223 Text Appearing After Image: Bastit ((i), p. 295),who has made a compar-ative study of the subter-ranean and aerial stems ofP. jimiperiniim, dividesthe outer tissue of the lat-ter into epidermis, hypo-derma, and cortex. Inthe subterranean stems hefinds the constructionquite different from thatof the leafv branches.The section of the formeris triangular, and its epi-dermis provided withhairs which are absentfrom the epidermis of theaerial parts. Rudimen-tary scales, arranged inthree rows, are present,and corresponding tothese are strands of tissuethat represent the leaf-traces of the aerial stems.The central cylinder ismuch larger relativelythan in the leafy branches,and its cross-section is notcontinuous, but is inter-rupted by three pericyclicsectors, composed ofcells whose walls are butlittle thickened. Thepoint of each sector is atthe periphery of the me-dulla, or central cylinder,and the broad end towardthe centre. As might beexpected, intermediate con-ditions are found wherethe rhizome begins to grow upward Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work. Identifier: structuredevelop00camp3 Title: The structure and development of mosses and ferns (Archegoniatae) Year: 1918 (1910s) Authors: Campbell, Douglas Houghton, 1859-1953 Subjects: Publisher: New York, Macmillan Contributing Library: The LuEsther T Mertz Library, the New York Botanical Garden Digitizing Sponsor: The LuEsther T Mertz Library, the New York Botanical Garden View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: inder; andvery much larger, thin-walled cells, appearing almost destituteof protoplasmic contents, and closely resembling the vessels oftrue vascular plants, and like them, no doubt, true water-con-ducting organs. Traversing the ground tissue are slenderstrands of elongated cells—leaf-traces, which are structurallylike the central cylinder of the shoot, but with the water-conducting cells less conspicuous. Most of the cells in thestem of Dawsonia, except the large tracheary cells of the centralcylinder, contain starch, which it is stated by Goebel (8) is notabundant in the tissues of Polytrichum, where its place is takenlargely by oil. Starch has been noted in Polytrichum in theouter cells of the stem and in the leaf-traces. The leaf-traces, or continuation of the central tissue of themidribs of the leaves, bend down into the stem, and finallyunite with the axial cylinder of the latter, in a mannerquite analogous to that found in the stems of many vascularplants. VI. THE BRYALES 223 Text Appearing After Image: Bastit ((i), p. 295),who has made a compar-ative study of the subter-ranean and aerial stems ofP. jimiperiniim, dividesthe outer tissue of the lat-ter into epidermis, hypo-derma, and cortex. Inthe subterranean stems hefinds the constructionquite different from thatof the leafv branches.The section of the formeris triangular, and its epi-dermis provided withhairs which are absentfrom the epidermis of theaerial parts. Rudimen-tary scales, arranged inthree rows, are present,and corresponding tothese are strands of tissuethat represent the leaf-traces of the aerial stems.The central cylinder ismuch larger relativelythan in the leafy branches,and its cross-section is notcontinuous, but is inter-rupted by three pericyclicsectors, composed ofcells whose walls are butlittle thickened. Thepoint of each sector is atthe periphery of the me-dulla, or central cylinder,and the broad end towardthe centre. As might beexpected, intermediate con-ditions are found wherethe rhizome begins to grow upward Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work. | ||||
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