BOTANICAL GEOGRAPHY. 29 



Delaware in New'York at Utsiantha Lake in Oquage mountains. The Ki- 

 kanom or Catakill mountains of New York. 6. The Dismal Swamp of De- 

 laware 7. Sherman Valley in the Alleghanies 8. The Cotocton moun- 

 tains of Maryland and Virginia cut through by the Potomac. 9. Valley of 

 Lovalhannan in west Pennsylvania. 10. Falls of the river Potomac. 11. 



Falls of the river Cumberland in Wosioto hills of east Kentucky 12. The 

 serpentine rocks of Chester and Maryland! 13. The Wiconisco, Tuscarora 

 and Central mountains of the Alleghames. 14. The summit of the Allegha- 

 nies in Maryland. 15. The Cacapon mountains of Virginia. 16. The prai- 

 ries of Bigbarren river in Kentucky. 17. The Wasioto Hills and mountains 

 of Kentucky, or Knob Hills, with their knoblicks. 18. The banks of the 

 Wabash, and glades near them. 19. The neck of land between the mouths 

 of Cumberland and Tennessee rivers, with the glades of South Kentucky 

 nd Tennessee. The shores of Lake Erie near Sandusky. 



I hardly need add the far famed fall of Nia- 

 gara, the head and falls of the Hudson, the Ta- 

 conick and Mattawan mountains, and in fact 

 every ridge of the Alleghanies. They are all 

 interesting botanical spots to visit j but in or- 

 der to detect all their plants, you must visit 

 them at least three times, in the Spring, Sum- 

 mer and Fall, or every month from May to Oc- 

 tober, and even some plants of short floral du- 

 ration may then escape you. How can we then 

 hope to know all our productions, except gra- 

 dually and by repeated explorations. I have 

 never been able to meet the Hamiltonia, nor 

 Centunculus, nor Parnassia in full bloom, and 

 many rare plants were only found once by me 

 during 24 years of exploration. 



It is a mistake to imagine that all our plants 

 are e ivan or nemorose, because forests abound 

 in our Continent, The plants growing under- 

 neath the shade of trees are not even the major 

 number, and we must look for many in mea- 

 dows, glades, fields, swamps, sea shores, banks 

 of rivers, brakes, (these are peculiar places in 

 woods or glades where ferns, canes or grasses 

 prevail,) salt licks, rocky hills and cliffs, moun- 

 tains tops, near springs and brooks. 



The distribution of the plants in these loca- 

 lities, and the distribution of peculiar tribes 



