320 PRACTICAL BOTANY 



292. Classification: 



Spermatophytes 

 Gymnosperms 



Class I. Coniferales. Leading genera used as illustrations, Pinus 



(pine), Picea (spruce), Pseudotsuga (Douglas fir), Tsuga (hem- 



. lock), Abies (fir), Taxodium (bald cypress), Thuja (cedar), 



Juniperus (red cedar, juniper), Sequoia (redwoods and big trees), 



Taxus (yew) 



Class II. Cycadales. Genera used as illustrations, Cycas, Micro- 

 cycas and Zamia 



Class III. Gnetales. Not studied in any detail 



Class I V. Ginkgoales. Represented by Ginkgo as the only living 

 genus 



