66 Addisonia 



the middle of the eighteenth century, while some were not dis- 

 covered until the beginning of the present century. 



The species here illustrated came to notice during a period 

 between these extremes, at a time when the plant treasures of 

 Florida began to be discovered in increasing numbers. 



It was during the Seminole War that Dr. M. C. Leavenworth, 

 a surgeon in the United States Army and an amateur botanist, 

 collected specimens of various plants met with in his travels and 

 sent them to Dr. John Torrey. The original specimens from which 

 Coreopsis Leavenworthii was described came from the vicinity of 

 Tampa Bay and near Fort Drane in what is now Marion County, 

 Florida. 



Curiously enough this plant named for Dr. Leavenworth has 

 nearly the same geographic range as Heliotropium Leavenworthii. 

 It, however, extends a little further north in the peninsula and is 

 found on some of the lower Florida Keys. Like the heliotrope 

 just referred to, it is a prominent element in the flora of the low 

 pinelands and marshes, and in many localities covers large areas 

 to the exclusion of all other conspicuous vegetation, the countless 

 myriads of heads thus forming stretches of brilliant yellow some- 

 times extending as far as the eye can see. 



The specimens from which the accompanying illustration was 

 made were collected by the writer in the Everglades near Cutler, 

 Florida, May 22, 1918. 



John K. Smali.. 



Explanation of Pi,ate. Fig. 1. — Flowering stem. Fig. 2. — Fruit, X 7. 



