64 



111. C. AUREA, WilkJ. (Golden Coryda'is.) 

 Hill sides and rocky woods. May 2. (B.) 



CRUOIFER^. Mustard Family. 

 NASrURTIUM, R. Br. Cress. 



114. X officinale, E. Er. (Water-cress.) 



Springs and brooks. Billings Bridge, Chelsea, ISTew Edinburgh, itc. 

 June. (B.) 



115. N. PALUSTRE, DC. (Marshcresp.) 



Low ground. A smooth sjjecies with jiods more than twice as 

 long as broad. Ju. 2. (B.) 



var. HispiDUM, Fisch. & Mey. 



Low ground. A rougher plant than the above with round pods. 

 Ju. 2. 



116. ZS". AJiPHiBiujr, E. Br. 



Low ground. A coarser and lai'ger plant than the above, the 

 stem generally decumbent and rooting at the base, Biennial or 

 perennial with pods shaped like those of j.V. palustre. Ju. 2 



119. N. LACUSTRE, Gray. (Eiver-cress.) 



Margins of rivers. Malloch's Bay, Ottawa, and abundant in the 

 Nation river at Casselnian. An interesting plant with the 

 submerged leaves much laciniated. The flowers and fruit are 

 not very freely produced ; but v^hen mature the leaves fall off, 

 throw out roots and become new plants. Ju. 2. 



120. N. Annoracia, Fries. (Horse Eadish.) 



Xw escape from cultivation. Occasionally found on waste {)laces 

 in the suburbs of the city. 

 DENTAEIA, L. Tooth-wo. t. 



121. D. DIPHYLLA, Michx. (Crinkle-root.) 

 Eich woods. May 2. (B.) 



122. D. LACIXTATA, Muhl. (Cut-leaved Tooth-A^ort.) 



Eich woods. A veiy local species, .so far only toun I at Beech- 

 wood, near the S.W. cor-ner of the cemetery. May I. (B.) 

 CARD AMI N E, L. Bitter Crss. 



124. C. RIIOMBOIDEA, DC. 



Eiver bank, Hull, F.Q. May 2. The plant I have referred 

 here is an ereut species with almost sessile leaves up the .-tern. 



