311 



ing leaves and capillary leaves as this does." Its affinity with 

 R. aquatilis is evident, however, from its beakless, rugose pubes- 

 cent achenia and hairy receptacle. 



I refer here, with considerable hesitation, the plant collected by 

 Professor Greene at lone, Cal., June 7, 1889, and the species may 

 occur in British Columbia. 



Capsella procmnbens (L.), Fr. Mant. Nov. Fl. Suec. i. 14 

 (1832). Reichenb. Ic. Flor. Germ. et. Helv. ii. t. xi. f 4221 



(1837)- 



Lepidium procumbens, L. Sp. PI. 643 (i753)- 



Hutchinsia p7'ocwnbens, D.C. Prodr. i. 178 (18 r 8). 



Capsella elliptica, C. A. Meyer, Verzeich. Pflanz. Cauc. 194 



(1831). 



Hynienolobus divaricatus and H. erectiis, Nutt. in T. & G. Fl. 



N. A. i. 117 (1838). 



Capsella divaricata, Walp. Rep. i. 175 (1842). 



I was first led to investigate the relations of the Old and New 

 World plants which have been described under the above-cited 

 names from finding them all united in the Kew Herbarium. An 

 examination of the specimens there preserved and subsequent 

 study of an extensive suite at home have convinced me that they 

 are all one species, adding another to the list of circumboreal 

 plants. In Europe it extends south to the Mediterranean region, 

 in Asia to Thibet, and it apparently occurs also in Australia. On 

 our own continent it has been found in Labrador by Mr. J. A. 

 Allen (along the seashore, Dead Islands, lat, 52° 48') and it is 

 widely distributed over the far west as far south as Utah and 

 Lower California. 



Hypericmn Canadense, L. van majus, Gray Man. Ed. 5, 86 



(1867). 



A study of this plant in the field and herbarium leads me to 

 think that it has good claim to specific rank. Its characters of 

 lanceolate, acute, 5 to 7-nerved leaves, greater size and longer 

 and sharper calyx-lobes seem quite constant. I have not seen it 

 growing with the typical H. Canadense. If they could be found 

 together, important evidence might be obtained. I do not pro- 

 pose here to elevate it to specific rank, but only to call attention 



