57 



var. Americanus, Sims. 



Eiver sides, trailing over sand or low plants. Distinguished from 

 the type by the short stems, obtuse bracts and pink flowers. 



July-1. (B) 



1599. C arvensis. (Small Bindweed.) 



Introduced. Cummings Bridge. Billings Bridge. Parliament Hill. 

 The original plants here are very persistent, but it does not seem 

 to spread much by seed. July — 1. 



CUSCUTA, L. Dodder. 

 1603. C. Gronovii, VVilld. 



Low open woods and river sides. Trailing over low plants, par- 

 ticularly Eupj,torium ageratoides. Not uncommon. July — 2. 

 A curious and interesting parasite, having bright orange stems, 

 and, for the genus, large white flowers borne in close clusters at 

 intervals along the stems. The only species of the genus so far 

 detected in this district. 



SOLANACE-ffi, L.— Nightshade Family. 



SOLANUM, L. 



1608. S. nigrum, L. (Common Nightshade.) 

 Introduced. Common in low ground. July — 1. (B) 



1609. *S'. Dulcamara, L. (Bittersweet.) 



Introduced. Bare in low woods. Billings Bridge and near the 

 Rideau rifle range. June — 2. 



1610. S. rostratum, Dunal. 



Introduced. This is a curious case of persistence. *S'. rostratum 

 is a Colorado plant, and interesting as being in all probability 

 the original food plant of the Colorado potato beetle. It can 

 generally be found every year in some part of the city in waste 

 places, but nowhere in abundance. First noticed by Mr. J. A. 

 Guignard in 1876. 



LYCOPERSICUM, Mill. Tomato. 

 1612. L. esculentum, Mill. 



Introduced. The tomato in some of its many cultivated forms is 

 always to be found growing on waste heaps and by waysides. 



