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. |
Dall'interno del libro
Risultati 1-3 di 83
Pagina 75
... shape as envelope . 6. Protoplast not same shape as envelope . 7. Cells compressed .. 7. Cells not compressed . 8. Front view ovate .. 8. Front view circular . 9. Posterior end with several conical projections .. 9. Posterior end ...
... shape as envelope . 6. Protoplast not same shape as envelope . 7. Cells compressed .. 7. Cells not compressed . 8. Front view ovate .. 8. Front view circular . 9. Posterior end with several conical projections .. 9. Posterior end ...
Pagina 84
... shape and secrete a smooth thick wall . Old zygotes usually have the green color masked by a reddish - orange hematochrome . B. submarina Bohlin ( Fig . 27 ) has been found along both the Atlantic and Pacific coasts of this country in ...
... shape and secrete a smooth thick wall . Old zygotes usually have the green color masked by a reddish - orange hematochrome . B. submarina Bohlin ( Fig . 27 ) has been found along both the Atlantic and Pacific coasts of this country in ...
Pagina 102
... shape characteristic of the genus.1 Platydorina is heterothallic and anisogamous . Male gametes are formed by cell division into a plakea that inverts to form a globose mass which escapes from the parent colony and does not dissociate ...
... shape characteristic of the genus.1 Platydorina is heterothallic and anisogamous . Male gametes are formed by cell division into a plakea that inverts to form a globose mass which escapes from the parent colony and does not dissociate ...
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