'240 FIELD COLUMBIAN MUSEUM BOTANY, VOL. II. 



Salicornia ambigua: 



See concluding paragraph under this head. 

 Salvia serotina: 



While this species is a common Antillean weed yet, from its 

 widespread utilization as an antifebrile tea, I judge that its presence 

 in the dooryard of the lighthouse residence on Loggerhead Key is due 

 to intentional planting. 

 Scaevola Plumieri: 



The black, pulpy fruits of this plant form a very attractive food 

 for land birds; it thus becomes scattered far throughout the Antillean 

 region. 

 Sesbania sericea: 



See note under Argemone leiocarpa. 

 Sesuvium portulacastruni: 



This is one of the commonest examples of aquavectant plants in 

 this region. Its large, bladder-like leaves prove excellent pontoons 

 to float the light axillary capsules. This is generally about the first 

 herb to find anchorage upon newly formed sand islets and strands. 

 Sida carpi nifolia: 



This, with its companion species, S. diffusa, is one of the com- 

 monest grass-plat and wayside weeds of the Antilles. The introduc- 

 tion of these two species into the lawn of Fort Jefferson on Garden 

 Key was possibly accomplished through sowing grass seed from Key 

 West or South Florida. 

 Sonchus oleraceus: 



See note under Argemone leiocarpa. 

 [ Thrinax keyensis: 



The type locality for this species is Marquesas "E, " where it is 

 doubtless in close association with Coccothrinax jucunda. As the 

 species have a similar appearance when neither in fruit nor flower, 

 Mr. Lansing only collected the latter.] 

 Tribulus terrestris: 



There is little doubt but that the presence of this species in the 

 dooryard of the lighthouse on Loggerhead Key is due to intentional 

 transplantation from Key West or Indian Key. 



The balance of the species in the Table of Distribution are com- 

 mon Antillean avevectent plants that are coming into the Sand Key 

 Flora with more or less heterogeneity, and will doubtless continue to 

 do so and be added to by many other species of like ease of trans- 

 portation. 



