. A manual of poisonous plants, chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations. Poisonous plants. 208 MANUAL OF POISONOUS PLANTS In some forms the oospores are rare, and in the potato rot fungus they have apparently not been found. In some members of this group oospores are formed without fertilization, (Parthenogenesis). Dr. G. P. Clinton,* who has made a careful study of the Lima Bean Mil- dew (Phytopthora Phaseoli) and the potato rot fungus {Ph. infestans) has been unable to find that the mycelial thread of the antheridium had
. A manual of poisonous plants, chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations. Poisonous plants. 208 MANUAL OF POISONOUS PLANTS In some forms the oospores are rare, and in the potato rot fungus they have apparently not been found. In some members of this group oospores are formed without fertilization, (Parthenogenesis). Dr. G. P. Clinton,* who has made a careful study of the Lima Bean Mil- dew (Phytopthora Phaseoli) and the potato rot fungus {Ph. infestans) has been unable to find that the mycelial thread of the antheridium had the same origin as the one which bears the oogonium. It is possible that the fertiliza- tion is accomplished in a manner similar to that given for some of the Mucors. He says in a discussion of the potato rot fungus, "All of these facts are now in favor, rather than against distinct mycelial strains (heterothallic forms) except the last, which might indicate a homothallic form, one which contains both antheridia on the same ; SAPROLEGNIACEAE Hyphae, long branched, undivided; zoosporangia cylindrical oospores pro- duced from sexual organs, terminal cells are cut off and converted into either. 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 Pammel, L. H. (Louis Hermann), 1862-1931. Cedar Rapids, Ia. , The Torch Press
Size: 1663px × 1503px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1900, bookdecade1910, booksubjectpoisonousplants
