TWO NEW BRITISH HEPATIC 307 
species by their involucres, there is none when fruit is present, 
the difference in the tetrads being so great. 
Douin first published S. californicus as European in Rev. 
Bryol. 105, 1907. He found that it was more common than 
S. Michelit in Eure-et-Loir, and that the plant which Boulay 
describes in Hépatiques de la France as the latter is most probably 
the former. He considers that it will most likely be found to be 
the commoner of the two throughout France. The two species 
grow close to one another or separately. 
The discovery of S. californicus in Britain is due to Mrs. Wood, 
who, having heard from Miss C. arter that I was anxious to 
examine English specimens of Spherocarpus, kindly sent me 
plants in December, 1907. These were without fruit, but in April 
of the present year further specimens w which were in 
fruit, and which allowed of certain identification. It has only as 
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near cultivated ground, as is the case elsewhere in Europe, such 
‘delicate plants being unable to compete with other vegetation 
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States of America. in Spec. He in Bull. Herb. 
had any shipped from New e also stated that he 
believed the principal American nurserymen who export plants to 
Engla o from Rochester and New York. Another nursery- 
that his plants, such as azaleas, kalmias, &c., were imported from 
Holland, and that he believed this was the case with most men 
who imported them. Mrs. Wood then wrote to Messrs. Veitch, 
Chelsea, who replied that their American plants came solely from 
Boston, Mass., and Charlotte, Ver., also that most of the American 
plants not grown in this country are brought from Holland, but 
that Belgium produces larger quantities of azaleas. ie dno 
I have gone into the question in this detail, as the distribution 
of S californicus in Europe is little known yet, it only having been 
