CLASSIFICATION": 107 



b. Pistils scale-like or wanting. 

 " c. Seeds naked, destitute of a pericarp. 



d. Embryo poly cotyledon ous. 

 The exogens fonn two sub-classes : 



Petaliferous. Plants of the endogenous structure, with 

 flowers constructed on the usual plan ; perianth 

 of one or more whorls of petals. 

 Gliimiferous. Plants of the endogenous structure, the 

 flowers in imbricated glumes, instead of petals 

 and sepals. 

 Angiosperms are further divided into 

 Apetalous, which have calyx, but no corolla. 

 Monopetalous, corolla entire. 

 Polypetalous, calyx and corolla. 

 Endogens, or monocotyledonous, are divided into 

 Flowers on a spadix. 

 Flowers not spadicious. 



With simjjle or double perianth, regular or irregular. 

 Flowers imbricated or with glumaceous bracts. 

 These are again grouped into herbaceous, or trees and 

 plants, terrestrial or aquatic. 



Anthers, introrse or extrorse. 

 Glumes, single or in pairs. 

 In this division we find the palm, yucca, banana. 

 You will now recapitulate what you have learned of the 

 natural system : 



That it is first divided into phenogamous and crypto- 

 gamous plants. 



That the phenogamia are further divided into 



1. Exogens. 



2. Endogens. 



That exogens are subdivided into 



1. Angiosperms. 



2. Gymnosperms. 



That the cryptogamia have three divisions : 

 1. AcROGENS, woody and vascular tissue. 



