96 



BULLETIN OF THE 



The sixteen large orders enumerated on page 89 may also be 

 compared with profit : 



Large Orders. 



1. Compositse 



2. Gramineoe 



3. Cyperacea: 



4. LeguminosEe 



5. Rosacese 



6. Labiatas 



7. Cruciferse 



8. Scrophulariacese 



9. Filices 



10. Ranunculaceoe _ 



11. Ericaceae 



12. Cupulifera; 



13. Orchidacere 



14. Liliacere 



15. Polygonaccte __, 



16. Umbellifera? 



Number of 

 Genera. 



U 



43 

 50 



9 

 17 

 12 

 22 

 14 

 14 

 *3 



9 

 18 



6 



13 



18 



3 

 16 



to 

 c 



IS 



53 

 43 

 10 

 24 

 15 

 23 

 16 



15 

 16 



7 

 11 



7 



12 

 18 



3 

 17 



Number of Species 

 and Varieties. 



O 



w 



136 

 128 

 120 

 39 

 55 

 35 

 29 

 29 

 40 

 30 

 37 

 16 



32 

 27 



27 

 20 



to 



149 

 no 

 108 



57 

 46 



42 



33 

 32 

 30 

 27 

 26 

 26 



24 

 24 



23 

 22 



In the flora of Essex County, the orders Umbelliferce (20) and 

 Oupuliferce (16) fall below the lowest of the sixteen for the flora of 

 Washington, ( Umbelliferce 22,) while on the other hand the Cary- 

 phyllacece (27,) Salicaceas (23,) and Naiadacece (28,) not in the list, 

 rise above that number. These orders in the flora of Washington 

 are 'represented respectively by 19, 19, and 9 species and varieties. 

 With reference to the last named of these orders, however, it may 

 be remarked that the genus Potamogeton, which constitutes the 

 greater part of it, has been imperfectly studied here, and will cer- 

 tainly be largely increased when thoroughly known. 



The orders in which this flora falls below that of Essex county 

 are : the Graminece, Oyperaeece, Bosacece, Filices, Ranunculacece, 

 Ericaceae, Liliacece, Orchidacece, and Polygonacece, nine in all. In 

 the remaining seven orders there is a greater number of species here 

 than there. It is noteworthy that our flora exceeds that of Essex 

 county most in the Compositce, Leguminosce, and Cupuliferce, and 



