78 NATURAL CLASSES. 



of it, grown by expansion and not super-addi- 

 tion. 



This view of physiological Botany might sug- 

 gest again another arrangement based thereon ; 

 and is perhaps susceptible of being improved 

 and made available. At present I merely throw 

 these hints, and invite the attention of Botanists 

 to the study of these forms of growth. To fix^ 

 them still better, I will give a short table of 

 such supposed modifications of growth, in 4 

 Organic Series. 



EXOGENES— 1. Trees or plants with joints 

 or articulations, growing by addition of parts. 

 ToMOGENES, foliose, aphyle. 



2, Trees or plants of a simple continuous 

 form, growing by expansion of parts. Aplogenes 

 foliose, aphyle. 



SARCOGENES— Fleshy trees or plants. 3 

 Tomogenes, foliose, aphyle. 



4. Aplogenes. foliose, aphyle. 



ENDOGENES— 5 Tomogenes, Equisetians 

 Orchidians, Culmidians. 



6. STELMOGENES,Stelmians,Rhizomians, Bul- 

 bosians, Filixians. All Aplogenes, growth foliose, 

 terminal crowning. 



7. Synogene«i, Very simple aplogenes, growth 

 by shoots with false leaves or frondose expan- 

 sions quite persistent. Muscidians, Frondu- 

 lians. 



LARNAGENES. — Siphogenes, growth by 

 tubular partitions, or agregated grains, vesicles 

 &.C. Confervites, Ceramites, Monilites, Physi- 

 drites. 



9. CoNDROGENES, with frondo or membrane 

 or crust expanded and lobed. Lichens, Ulvites, 

 Fucites, Usnites, Podospermes ? 



10. Mycogenes, with pileus or head distinct 



