Textbook of Theoretical Botany, Volume 1 |
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Page 493
... prothallus or prothallium is formed ( Fig . 484 ) . The prothallus is usually heart - shaped , but this depends to a large extent upon its environment . When a number of prothalli are crowded together they never reach the heart shape ...
... prothallus or prothallium is formed ( Fig . 484 ) . The prothallus is usually heart - shaped , but this depends to a large extent upon its environment . When a number of prothalli are crowded together they never reach the heart shape ...
Page 555
... prothallus , with a four - tiered neck which projects slightly . The venter has no wall ( Fig . 561 ) . Inside the megaspore a considerable amount of nucleated protoplasm remains , filling the cavity below the prothallus ( compare ...
... prothallus , with a four - tiered neck which projects slightly . The venter has no wall ( Fig . 561 ) . Inside the megaspore a considerable amount of nucleated protoplasm remains , filling the cavity below the prothallus ( compare ...
Page 684
... prothallus , contained in the megaspore ( Fig . 686 ) . The membrane round the embryo sac corresponds to the wall of the free megaspore in the Cryptogams . Although it is not so massive a structure as in Selaginella or Isoetes , it is ...
... prothallus , contained in the megaspore ( Fig . 686 ) . The membrane round the embryo sac corresponds to the wall of the free megaspore in the Cryptogams . Although it is not so massive a structure as in Selaginella or Isoetes , it is ...
Contents
CYTOLOGY | 5 |
THE BASIS OF PLANT CLASSIFICATION | 38 |
THE ALGAE | 51 |
Copyright | |
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Algae Angiosperms antheridium antherozoids apex apical cell appear archegonium arise Asexual reproduction axillary axis basal base become branches cambium cell wall central chloroplasts chromosomes conidiospores consists cortex cytoplasm Dicotyledons differentiation diploid divides division elongated embryo endodermis epidermis female Ferns fertilization filaments flagella formation formed fruiting body Fungi Fungus gametangium gametes gametophyte genera genus germinate grow growth hyphae inner internodes lamina lateral layer leaf traces leaves Longitudinal lower male mature megaspore membrane meristem Monocotyledons monoploid mother cell mycelium nodes nucellus nucleus occur oogonium oosphere organs outer ovule parenchyma pericycle perithecium petiole phloem plants primary produced prothallus protoplasm protoxylem radial rhizoids rhizome ring root secondary separate Sexual reproduction shoots showing side single species sporangia sporangium spores sporophylls stage stalk stele stem strobilus structure surface thallus thick thickened tissue tracheids Transverse section tube upper usually vacuole vascular bundles vegetative xylem zone zoosporangium zoospores zygote