46 



opposite Vancouver City this form is common, but the spots are 

 orange. I therefore propose — 



R. albiflorum Hook, forma poikilon f. n. 



The three anterior petals spotted towards the base with yellow 

 or orange. 



Some Corolla Forms of Campanula rotundifolia L. 



At Field in the Rockies, and at Revelstoke in the Selkirks 

 many forms of this species occur. The variations in the corolla 

 at once attract even the casual observer. Forms with funnel- 

 shaped corollas (C. diibia A. DC.) grow side by side with the 

 forms characterized by the round base. Ordinarily there is no 

 difhculty in distinguishing the plants. A striking white-flowered 

 form of C. duhia was observed at Revelstoke. Miss Farr, in her 

 catalogue for this region, based in part on Macoun's Catalog of 

 Canadian Plants, mentions only C. petiolata and C. rotundifolia. 

 There is also a form at Field with campanulate corollas broader 

 than long — 20-23 mm. broad, 14-16 mm. long; but I have seen 

 too few plants to form an opinion as to the validity of the form. 

 The funnel-form corollas are also sometimes as broad as long, 

 or even broader. 

 Vancouver 



REVIEWS 



Steven's Fungi which Cause Plant Disease =*= 



As stated in the preface, this volume is intended to introduce 

 to the student the more important cryptogamic parasites affecting 

 economic plants in the United States, with sufficient keys and 

 descriptions to enable the student to identify them. The book is 

 in fact rather unique in respect to these keys, and is apparently 

 intended to be supplemented by the author's Diseases of Econ- 

 omic Plants or by other available books on plant pathology, 

 since in the volume before us but little cognizance is taken of 

 the pathological effects on the host or remedial measures. 



The readily available keys should undoubtedly prove exceed- 

 ingly useful to students of plant diseases. Of perhaps even 



* F. L. Stevens. The Fungi which Cause Plant Disease. Pp. vii-ix + 1-754 

 /. I-44Q. The Macmillan Company. New York. 1913. Price, S4.00. 



