188 MANUAL OF BOTANY 



Class X.— MONOCOTYLEDONES. 



The general histology as well as the morphology of this group 

 has been already treated of in some detail. 



The class is divided by Bentham and Hooker into the 

 following seven series, each including several natural orders. 



Series 1. — Microspermce. 



Characters. — At least the inner whorl of the perianth peta- 

 loid. Ovary inferior, 1-celled with 3 parietal plaeentse, or rarely 3- 

 celled with axile plaoentse ; seeds very small, numerous, exal- 

 buminous. 



Order 1. HydrocharidacesE. 



2. BurmanniaeesE. 



3. Orchidaoese. 



4. Apostasiaceffi. 



Series 2. — Epigynce. 



Characters. — At least the inner whorl of the perianth peta- 

 loid. Ovary inferior, except in a few genera of Bromeliaoeaa and 

 HEemodoraceBB. Albumen copious. 



Order 5. Zingiberaceie or Soitaminacese. 



6. Marantacese or Cannacese. 



7. Musacese. 



8. Bromeliacese. 



9. Htemodoracese. 



10. Iridaceae. 



11. AmaryllidaceEe. 



12. Taccaciaa. 



13. DioscoriaoesB. 



Series 3. — Coronarice. 



Characters. — At least the inner whorl of the perianth peta- 

 loid. Ovary free, or very slightly adherent at base. Albumen 

 copious. 



Order 14. Boxburghiaceaj. 



15. LiliacesB. 



16. Philesiacese. 



17. Melanthacese or ColchicaceEe. 



18. Smilacese. 



