Ivi INTRODUCTION TO BOTANY. 



of the one-petalled, stamen-bearing corolla. There are three 

 kinds of insertion, 



1st. The hypogynoiis, in which the germen or ovary being 

 entirely free, the stamens or stamen-bearing corolla are in- 

 serted around its base. See Plate 12. 



2nd. The pertgynoics insertion, wherein the ovary or germen 

 being free or parietal,' the stamens are inserted, or one-petalled, 

 stamen- bearing corolla is inserted on the calvx, at a certain 

 distance from the circumference of the base of the ovary or 

 germen. See Plate 12. 



3rd. The epigi/nous insertion, wherein the ovary or germen 

 is always inferior, or where the stamen-bearing corolla, or the 

 stamens are inserted on the upper part of the ovary or germen. 

 See Plate 12. 



The acotyledonous plants, the mosses, &c. being destitute of 

 embryos, and of flowers and fruit, do not enter into this classi- 

 fication, but they constitute a first class : and 



The acotyledonsy and monocotyledons four classes ; for 

 example : — 



CLASS. 



Acotyledons . . . . 1st. 



/'hypogynous stamens . 2d. 



Monocotyledons, with J perigynous stamens . 3d. 



(^epigynous stamens . 4th. 



We remark that dicotyledonous plants, are either destitute of 

 a corolla, that is, apetaloiis, or are one-petalled [monopieta- 

 lous,) stamen-bearing, or their corolla is many-petalled {poly- 

 petalous.) Hence we have three divisions in the dicotyledo- 

 nous plants, viz. : — 



DIVISION. '• 



1. Dicotyledonous apetalous. 



2. monopetalous, 



3. polyp^talous. 



These three sections just mentioned of apetalous^ &c. are 

 again divided into classes, by the above mentioned character 

 of insertion. Thus, the dicotyledonous apetalous, form three 



1 See Plate 12. 188. 



