160 



MANUAL OF POISONOUS PLANTS 



a shorter or longer period the protoplasm contracts forming little heaps which 

 contain the spores; the parts of the reproductive body are called the sporangium 

 or spore case, the peridiiini or the wall of the case, the stipe or stalk, the 

 columella or central axis in the spore case, the capillitium or fine threads, and 

 the spores. The spores after absorbing water, germinate b}' breaking the wall 

 and move about by means of cilia ; sexual reproduction is entirely absent. 



The division Myxothallophyta includes three classes: Acrasieae without 

 swarm cells; Plasinodioplwrales of which the club root of Cabbage, Plasmodio- 

 phora Brassicae is an example (a very destructive parasite upon cabbage, 

 turnip, etc., in Europe and the Eastern States) ; and Myxogasteres which con- 

 tains a great many species and genera common on spent tan bark, rotten logs, 

 and the ground. Of the third class Siemonitis, Pliysaruin, Lycogola and Fuligo 

 are common genera. No species of this class is poisonous so far as known. 



EUTHALLOPHYTA 



Cells generally with cell membrane, with one or more generations, sexual 

 reproduction frequently absent, the fertilized spores when present, with 1 cell 

 which later separates from the mother plant, or a several-celled body resulting 

 from the fertilization of the female fructifying body, which later develops 

 into a new plant. This division includes such plants as bacteria, blue green algae, 

 the green algae, rusts, smuts, mildews, moulds, pufFballs, mushrooms and toad- 

 stools. 



SCHIZOPHYTA 



Small unicellular organisms, never green but frequently of other colors, 

 blue greens, etc., reproduction asexual by fission, spores formed in the interior 



/ 







Fig. 19. Schizophyta. Scliizomycetes Bacteria. 1 and 2. Bacillus subtilis 3 and 4. 

 Bacillus anthracis. 1, 3 and 4x1000. 1, 3, and 4 after Friinkel and Pfeiffcr. 2 after Migula. 



