CLA SSIFICA TION. 65 3 



But in giving the technical name of the plant only two of 

 these names are used, the genus and species, so that for the 

 toothwort we say Dentaria diphylla, and for the white wake- 

 robin we say Trillium grandiflorum. 



1144. Kingdom and Subkingdom. Organic beings form alto- 

 gether two kingdoms, the Animal Kingdom and the Plant King- 

 dom. The plant Kingdom is then divided into a number of 

 subkingdoms as follows: ist, Subkingdom Thallophyta, the 

 thallus plants, including the Algae and Fungi; 2d, Subkingdom 

 Bryophyta, the moss-like plants, including the Liverworts and 

 Mosses; 3d, Subkingdom Pteridophyta, the fern-like plants, 

 including Ferns, Lycopods, Equisetum, Isoetes, etc.; 4th, Sub- 

 kingdom Spermatophyta, the seed-plants, including Gymno- 

 sperms and Angiosperms. Subkingdoms are divided into groups 

 of lower order down to the classes. So there are subclasses, 

 subfamilies or tribes, subgenera, and even subspecies. But 

 taking the principal taxonomic divisions from the greater to the 

 lesser rank, the order would be as follows: 

 Plant Kingdom. 



Subkingdom, Spermatophyta. 



Group (not used in a definite sense). 

 Class, Gymnospermae. 

 Order, Pinales. 

 Family, Pinaceae. 

 Genus, Pinus. 



Species, strobus, or, in full. 

 Pinus strobus, the white pine. 



