. Essentials of botany. Botany; Botany. THE BRYOPHYTES 269 345. Minute Structure of the Male Receptacle and Antheridia.— Make thin vertical radial sections (in pith) of a male receptacle and examine with and ^ Note: (n) The flask-shaped cavities in which the an- theridia are borne. Where do they open ? (b) The antheridia of various ages, each with a, stalk bearing a sperm-case. (c) In water in which a fresh male receptacle has been left for a short time look with for moving sperms. Kill them with iodine, run water under the edge of the cover-glass, study, and draw. Or crush a mat
. Essentials of botany. Botany; Botany. THE BRYOPHYTES 269 345. Minute Structure of the Male Receptacle and Antheridia.— Make thin vertical radial sections (in pith) of a male receptacle and examine with and ^ Note: (n) The flask-shaped cavities in which the an- theridia are borne. Where do they open ? (b) The antheridia of various ages, each with a, stalk bearing a sperm-case. (c) In water in which a fresh male receptacle has been left for a short time look with for moving sperms. Kill them with iodine, run water under the edge of the cover-glass, study, and draw. Or crush a mature antheridium from preserved material and study the sperms. 346. Minute Structure of the Female Receptacle and Archegonia. — Cut thin ra^ dial vertical sections (in pith) of young female recep- tacles, making the sections pass through the portions between the ravs, or Fig. 104. Female Receptacle of 2Iar- chantia (lengthwise section, consider- ably magnified). c, canal in neck of archegoniiun; e, egg in archegonium; p, breathing pore; chl, cells, in air-chamber, containing chlorophyll; /, lobe of the receptacle; s, fringed appendages of receptacle. If possible use also prepared slides of microtome sections. Examine with and note : (a) The archegonia of various ages. Where are the youngest ? (b) The parts of an archegonium, — a short, stout stalk, an en- larged body, or venter, and a slender neck. Draw. (c) Inside of the venter in the older archegonia an egg. Draw. 1 Prepared slides of microtome sections will show the relative positions of the parts more 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 Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Ginn
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