268 



An interesting case of association, which may have some sig- 

 nificance, is that of two aquatic monocotyledons of tropical and 

 subtropical America, Habenaria repens Nutt., an orchid, and 

 P iar pus eras sipes (Mart.) Britton, the water-hyacinth. My 



Fig. I. hocality ior Habenaria repens and Piaropus crassipes. 



Sept. II, 1914. 



Tallahassee, Fla. 



first meeting with both of these in a wild state was in Lowndes 

 County, Georgia, in September, 1902.* There the orchid was 

 supported by floating masses of the hyacinth in water several 

 feet deep. About a year later I collected the Habenaria at the 

 edge of the estuarine marshes of the Altamaha River just below 

 Darien, Ga., and in 1908-9 I found both plants in marshes, lakes 

 or streams at several places in central Florida, but never together. 

 (Dr. J. K. Small, however, tells me that they associate in Lake 

 Okeechobee. Both are reported from northern South America, 

 but whether as associates or not is not stated.) 



In 1914 I found the two plants intimately associated, and 

 blooming at the same time, in a miry meadow near the south- 

 eastern corner of Tallahassee, Fla. ; not floating, as they usually 

 do elsewhere, t but the water-hyacinth rooting in the mud and the 



*See Plant World 6: 164-165. July, 1903. 



t In this connection see Ames, Orchidaceae i: 51-53. 1905; Rusby, Jour. N. Y. 

 Bot. Gard. 7: 112-115. 1906; Harper, Ann. Rep. Fla. Geol. Surv. 3: 293, 340, 342. 

 1911. 



