Revisions of Some Plant Phyla 5 



Class 8. PHYCOMYCETEAE. Tube Fungi. Lower Fungi. 

 Filaments tubular, irregularly branched, chlorophyll-less. 



Order Saprolegniales. Typically aquatic ; mostly saprophytic ; 

 forming zoospores in zoosporangia. 



Family 6. Monoblepharidaceae. Filaments simple or branched, 

 septate above, tubular below, colorlesss ; propagation by unicili- 

 ated zoospores ; generation heterogamic, the sperms uniciliated, 

 the eggs non-ciliated, and remaining in the oogone. Small, 

 saprophytic aquatic fungi. Monoblepharis. (Pf. I, i, io6.) 



Family 7. Saprolegniaceae. Water Molds. Aquatic, well- 

 developed, free branched, parasitic or saprophytic filaments, at- 

 tached by endogenous rhizoids ; zoospores biciliated ; eggs i to 

 several in each oogone ; antherids not producing sperms. Sapro- 

 legnia, Achlya. (Pf. I, i, 93.) 



Family 8. Pythiaceae. Aquatic or terrestrial, saprophytes or 

 parasites, the slender filaments without rhizoids ; zoospores bicili- 

 ated ; eggs single ; antherids not producing sperms. Pythmm. 

 (Pf. I, I, 104.) 



Family 9. Cladochytriaceae. Aquatic, endogenous, branched 

 parasitic filaments, with no rhizoids. Cladochytrium. (Pf. I, i, 

 80.) 



Family 10. Ancylistaceae. Aquatic, endogenous, simple, few 

 celled parasitic filaments, with no rhizoids. Lagenidium, Rhiso- 

 myxa. (Pf. I, i, 89.) 



Order Peronosporales. Non aquatic, mostly parasitic in the 

 tissues of higher plants, usually forming zoospores in conidia. 



Family ii. Albuginaceae. White Rusts. Conidia in chains, 

 forming zoospores ; parasites in the tissues of higher plants. 

 Albugo. (Pf. I, I, no.) 



Family 12. Peronosporaceae. Downy Mildews. Conidia singly 

 terminal on branched conidiophores, mostly forming zoospores ; 

 parasitic in the tissues of higher plants. Phytophthora, Plasmo- 

 para, Pcronospora. (Pf. I, i, 112.) 



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