ADDITIONAL DELAWARE CO. PLANTS. 73 



6 Alsine aquatica fL.) Britton. [ Stellaria aquatica (L.) vScop. ] 



European. Occasional weed. Along the railroad 

 at Cheyney. 



7 Barbarea stricta Andrz. 



European. Occasional or frequent weed. Marcus 

 Hook. 



8 Roripa sylvestris (L.) Bess. [Railicula sylvestris (L.) Druce.] 



European. Occasional or frequent weed. 



9 Cleome spinosa L. 



Tropical. Occasional escape from gardens. 



10 Sorbaria sorbifolia (L.) A. Br. 



Siberian. Occasional escape from gardens. 



11 Euphorbia cyparissias L. 



European. More or less frequent escape from gar- 

 dens to cemeteries, etc. 



12 Conium maculatum L. 



European. Occasional weed. Lima. 



13 Quamoclit coccinea (L.) Moench. [Ipoinoea coccinea L.] 



Tropical American. Occasional on dump heaps, etc. 

 Secane. 



14 Convolvulus japonicus Thiinb. 



Asian. Occasional escape from old gardens. Wawa. 



15 Micrampelis lobata (Michx.) Greene. 



[Echinoc3'Stis lobata (Michx.) Torrey and Gray] 



Native of eastern United States, but I believe wholly an 

 introduction in Delaware Co. It is seen rather frequenth' 

 in moist soil.especially about dump heaps and waste land. 



1*1 Hellanthus annuus L. 



Native of the prairie States west of the Mississippi 

 River. Occasionally escaped from or persisting after 

 cultivation. 



