The Fresh-water Algae of the United StatesMcGraw-Hill, 1950 - 719 pagine This edition follows the general plan of the first edition, except for treatment of the species in the various genera. In the first edition, where there were less than ten species in a genus, each was named and briefly characterized. In this edition the species of a genus are listed and references given to sources where a complete description of each of them can be found. Another change is the addition of a survey of the Charophyceae, Cryptophyceae, and Chloromonadales, groups that were not treated in the first edition. |
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Risultati 1-3 di 89
Pagina 211
... develop a rhizoidal branch , or formation of rhizoidal branches may be delayed until the germling is several cells in length . Akinetes develop on rhizoidal branches only1 and may be solitary or in catenate series of three or four ...
... develop a rhizoidal branch , or formation of rhizoidal branches may be delayed until the germling is several cells in length . Akinetes develop on rhizoidal branches only1 and may be solitary or in catenate series of three or four ...
Pagina 284
... develop into parthenospores that , except for their smaller volume , are identical in appearance with zygotes . Practically all present - day phycologists divide the order into three families . FAMILY 1. ZYGNEMATACEAE Members of this ...
... develop into parthenospores that , except for their smaller volume , are identical in appearance with zygotes . Practically all present - day phycologists divide the order into three families . FAMILY 1. ZYGNEMATACEAE Members of this ...
Pagina 613
... develop into thalli identical in vegetative structure with those producing them . If division of the zygote nucleus is meiotic , the carpo- spores develop into haploid thalli producing spermatangia and carpogonia . If division of the ...
... develop into thalli identical in vegetative structure with those producing them . If division of the zygote nucleus is meiotic , the carpo- spores develop into haploid thalli producing spermatangia and carpogonia . If division of the ...
Sommario
NATURE EVOLUTION AND CLASSIFICATION OF THE ALGAE | 1 |
THE DISTRIBUTION AND OCCURRENCE OF FRESHWATER ALGAE | 12 |
COLLECTION PRESERVATION AND METHODS OF STUDYING THE FRESHWATER ALGAE | 27 |
Copyright | |
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Parole e frasi comuni
akinetes algae algal apical aplanospores Asexual reproduction Auxospores axial axis basal biflagellate branches cell division cell wall Chlorophyceae chloroplast chromatophores colony conjugation contains contractile vacuoles cup-shaped cylindrical cytoplasm daughter cells develop diatoms differ as follows discoid ellipsoidal elongate epiphytic eyespot filaments flagella flagellated flagellum flora formation four free-floating fresh-water frustules G. M. Smith G. S. West gametes Geitler gelatinous gelatinous envelope gelatinous material gelatinous sheath genus germination girdle view globose growing heterocysts Ibid intercalary bands irregularly isogamous Klebs Korshikov Kütz laminate layer liberated longitudinal lorica motile Myxophyceae Näg nodule nucleus Oedogonium ornamentation parent-cell wall parietal Pascher plankton plast poles portion posterior Protistenk protoplast pyrenoid quadriflagellate raphe rhizoidal semicells sessile setae Sexual reproduction shape solitary species found spherical spines Spirogyra spores starch statospores structure thallus transverse trichomes Ueber unicellular uninucleate usually valve view vegetative cells Volvocales zoospores zygote