27 



miles is practically unexplored in this regard, and Haiti with 



30,000 square miles is a veritable terra incognita. 



Purdue University, 

 Lafayette, Ind. 



SHORTER NOTES 



Concerning Some Species of Chrysopsis in Colorado : — In 

 studying my specimens of Chrysopsis I came to some conclusions 

 which are somewhat different from the classification in our 

 manuals. The genus is, of course, a rather difhcult one, as the 

 various treatments indicate, and I can only give my conclusions. 



It seems to me that Chrysopsis resinolens A. Nelson and C.fid- 

 crata Greene are the same species, and that since C. fulcrata was 

 described earlier than C. resinolens it should replace that name. 

 Dr. Greene sent me a specimen of C. fulcrata, and while it is a 

 taller plant than any specimen of C. resinolens which I have seen, 

 yet the main characters of leaf, the size of the flower-heads and 

 their disposition at the end of the stem, the pubescence, and the 

 resinous atoms on the leaves, are about the same. The species 

 is quite variable according to localities in which it grows, and 

 some forms might be distinguished, yet the plant I have from 

 Dr. Greene and one I have from Prof. Nelson seem to be the 

 same species. 



Chrysopsis caudata Rydb. is not the same as C. fulcrata, but is a 

 good species, distinguished by the dilTerent leaves and larger 

 heads. Chrysopsis amplifolia Rydb. is much like C. caudata and 

 I think may be referred to that species. Chrysopsis horrida 

 Rydb. seems to be too close to C. hispida (Hook.) Nutt. 



George E. Osterhout 



Windsor, Colo. 



REVIEWS 



Atkins's Some Recent Researches in Plant Physiologry * 



As stated in the preface, the general aim of this book is to 

 present to senior students and investigators the results of recent 



* Atkins, W. R. G., Some Recent Researches in Plant Physiology'. Pp. i-xi 

 +328. With 28 illustrations. London. Whittaker & Co. 1916. 



