JUSSIEU'S NATURAL SYSTEM. 201 



CLASS I. ACOTYLEDONES. 



7. Here are included all plants that are considered 

 to be destitute of cotyledones, in which vegetable orga- 

 nization exists in its most simple state. 



They present no other appearance than a nearly homogeneous 

 substance, of an uniform cellular tissue, without the usual vessels. 

 The parts of fructification are indistinct or imperceptible. 



8. The orders or families of plants which compose 

 this class are eleven, viz. algce, fungi, hypoxilece, lichenes, 

 hepatica, musci, and others. 



1. Algae Fucus. 



2. Fungi Agaricus. 

 Hypoxileae Verrncaria. 

 Lichenes Usnea. 

 Hepaticse Marchantia. 

 Musci Polytrichiu m , 

 LycopodiaceEB Lycopodium. 



8. Filices Pteris. 



9. Cycadese Cycas. 



10. Equisetaceae Equisctum. 



11. Salvineae Salvinia. 



II. MONOCOTYLEDONOUS PLANTS. 



SEEDS WITH ONE COTYLEDON. 



9. The plants of this division, have seeds with one 

 cotyledon. They are more perfect in their organization 

 than the acotyledones. The parts of fructification are 

 very distinct; and the seed, when developed gives out 

 the plumelet, consisting of one leaf only, but the leaves 

 which grow on the stem subsequently, are alternate. 



