72 



The Vegetation of the 



Chester, Pa. ; New- 

 castle, Del. 



Compositse 130 



Cyperaceae 83 



Grraminese 78 



Leguminosse 40 



Rosaceae 33 



Filices 32 



OrchidacesB 29 



Labiatje 28 



Ericaceae 26 



ScrophulariacEe 23 



502 



Arkansas. 



Compositse 164 



GramineBB 78 



Legaminosse 77 



Cyperacese 46 



Labiates 35 



Scrophulariacese 28 



Kosaceee 27 



Filices 25 



Umbelliferse 24 



Crucif erse 21 



525 



Illinois. 



Compositse 132 



Cyperaceee 92 



Graminese 75 



Leguminosse 49 



Rosacese 36 



ScrophulariaceBB ... 28 



Labiatse 27 



Ranuneulacese 26 



rilices 25 



Liliacese 23 



Michigan. 



Compositse 116 



Cyperacere 100 



Graminese 73 



Rosacefe 46 



Leguminosse 38 



Orchidacese 35 



Scropliulariacese ... 28 



Ranunculacese 26 



Filices 25 



Labiatse 25 



512 



Louisiana. 



Compositse 172 



Leguminosse 70 



Graminese 66 



Cyperacese 58 



Scrophulariacese 29 



Rosacese 23 



Umbelliferse 20 



Labiatse 19 



OnagracesB 19 



Orchidacese 18 



494 



Peoria. 



Compositse 158 



Cyperacese 90 



Gramineas 84 



Leguminos se , . 45 



Rosacese 30 



Labiatse ,. . 27 



Ranunculacese 26 



Scrophulariacese ... 26 



Umbelliferse 20 



Filices 20 



Wisconsin. 



Compositse — 123 



Cyperacese 90 



Graminese 72 



Rosacese 40 



Leguminosse 38 



Filices 30 



Orchidacse 26 



Scrophulariacese 26 



Ranunculacese 26 



Liliacese 24 



495 



Colorado. 



Compositse 161 



Leguminosse 82 



Graminese 78 



Cyperacese 53 



Scrophulariacese ... 42 



Rosacese 38 



Ranunculacese 37 



Crucif erse 30 



Saxif ragacese 28 



Polygonacese 28 



577 



Washington, D. C. 



Compositse 130 



Cyperacese 89 



Graminese 85 



Leguminosse 45 



Rosacese 34 



Labiatse 31 



Filices 28 



Scrophulariacese ... 27 



Ericacese 25 



Ranunculacese 24 



513 526 518 



The relative number of Compositae increases toward the south and 

 west, and only in Massachusetts and New York they do not take the first 

 place; the Graminese take nearly throughout the third place. The num- 

 ber of Leguminosse increases southward in a great proportion; while the 

 Rosacese prevail in the north and decrease southward. The Ericacese, so 

 numerous in the east, are little represented in the west; the Labiatse 

 increase southward, the Scrophulariacese westward; the Orchidacese and 

 Filices take'a higher position in rank in the north than in the south; the 

 Ranunculaceas are most represented in Colorado, and only little in the 

 south. The Liliacese have only in Ohio, Illinois and Wisconsin a place 

 amongst the ten prevalent orders. TJmbelliferas and Cruciferse increase 



