41 



and studied by the writer with the assistance of Dr. M. A. Howe 

 and Dr. A. W. Evans, Ccplialosia Francisci (Hook.) Dumort. is 

 recognized for the first time as an American species. Ceplialo.zia 

 Francisci is somewhat rare in Europe, though it has been found 

 in England, Ireland, France, Denmark and Germany. Various 

 botanists have mentioned and described it, Sir W. J. Hooker 

 being the original describer under the name of Jnngermannia 

 Francisci in his British Jungermanniae, pi. ./p. His full descrip- 

 tion and -figures agree with our specimen except in regard to 

 the perianth, which he says is " evidently toothed," ours being 

 simply repand as Spruce later described it in his work on Ceplia- 

 lozia (p. 49). The perianths in our specimen agree well with those 

 of two specimens from the Rheinprovinz in the herbarium of the 

 New York Botanical Garden. In Europe the species is said to 

 be "in fruit," gemmiparous also, in spring and early summer; 

 here, at this Maine station, it bears gemmae, immature androecia, 

 and perianths with immature sporogoma, in August. This locality 

 in Maine proved also a new station for Frullania Tamarisci (L.) 

 Dumort., which is rare in this country; and Scapania curta (Mart.) 

 Dumort., also, was found growing there with Riccardia latifrons 

 Lindb. and Ceplialozia Innidaefolia Dumort., evincing the same 

 choice of associates as when found a few years ago on the other 

 side of the continent, at Sisson, Siskiyou Co., California, by Dr. 

 Howe. Caroline Coventry Haynes. 



16 East 36TH Street, 



New York City. 



REVIEWS 



The Influence of Light and Darkness upon Growth and Development * 



So incomplete and contradictory conclusions have been ob- 

 tained upon this subject by various authors since the time of 

 John Ray, 1686, that it is fortunate that this question has been 

 at last taken up in a systematic and comprehensive manner. In 

 the present memoir, Doctor MacDougal has presented an excep- 

 tionally important contribution to science. The work is a model 

 of its kind not only in the scope of the undertaking, but in the 



* MacDougal, D. T. The Influence of Light and Darkness upon Growth and 

 Development. Mem. N. Y. Bot. Garden 2 : i-xiii -f- 1-3 19./. i-ij6. 20 Ja. 1903. 



