. 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: (a) The flask-shaped cavities in which the an- theridia are borne. Where do they open ? (5) 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 matur
. 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: (a) The flask-shaped cavities in which the an- theridia are borne. Where do they open ? (5) 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 rar dial vertical sections (in pith)of young female recep- tacles, making the sections pass through the portions between the rays, or arms. If possible use also prepared slides of microtome sections, with and note : (a) The archegonia of various ages. Where are the youngest ? (6) 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 clearly. Fig. 194. Female Receptacle of Mar- chantia (lengthwise section, consider- ably magnified). c, canal In neck of archegonium; e, egg in archegonium; p, hreathing pore; chl, cells, in air-chamber, containing chlorophyll; I, lobe of the receptacle; s, fringed appendages of receptacle. Examine. 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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