2138' A TEXTBOOK OF THEORETICAL BOTANY 



III. Chrysophyceae 



1. Chrysomonadales 



2. Chrysosphaerales 



3. Chrysotrichales 



IV. Bacillariophyceae 



V. Cryptophyceae 



1. Cryptomonadales 



2. Cryptococcales 



VI. Dinophyceae (Peridinieae) 



A. Desmokontae 



B. Dinokontae 



1. Dinoflagellata 



2. Dinococcales 



3. Dinotrichales 



Chloromonadineae 



VII. 



VIII. 



IX. 



Euglenineae 



Phaeophyceae 



Ectocarpales 

 Tilopteridales 

 Cutleriales 

 Sporochnales 



Desmarestiales 



Laminariales 



Sphacelariales 



Dictyotales 



Fucales 



X. Rhodophyceae 



a. Bangioideae 

 I. Bangiales 

 Florideae 



[i. 



Nemalionales 



Gelidiales 



Cryptonemiales 



Gigartinales 



Rhodymeniales 



Ceramiales 



XI. 



Myxophyceae (Cyanophy- 

 ceae) 



Chroococcales 

 Chamaesiphonales 

 Pleurocapsales 

 Nostocales 

 Stigonematales 



In comparing the various systems in their historical sequence it may be 

 noticed that the differences he chiefly in the grouping of the orders. The 

 orders themselves have remained fairly constant throughout, although their 

 number has tended to grow somewhat through the separation of parts of the 

 older orders under new names by later authors. 



ll 





THE FUNGI 



In 1 80 1 C. H. Persoon published his " Synopsis Methodica 

 Fungorum", which was the first serious attempt to classify and describe 

 the then known Fungi of the whole world. It was an ambitious task but 

 his references to exotic fungi were so few that his work covers little more 

 than European mycology. The chief value of the work lies in the careful 

 descriptions of those Fungi he includes, which, besides the larger macro- 

 Fungi, embrace many micro-forms. His work is regarded as the starting- 

 point of the nomenclature of the Rusts, Smuts and Gasteromycetes. 

 Persoon arranged the species into Classes, Orders and Families and gave 

 a brief diagnosis of each. The Puff Balls and the Myxomycetes are grouped 

 together because both have closed fruiting bodies, a policy which was 

 adopted by many later writers. 



During the next twenty years a number of descriptions were published 

 of collections of Fungi made in various parts of the world and our knowledge 

 of tropical Fungi greatly increased, but no work of general systematic 



