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Yapp (Richard. Henry). SpircHci Ulmaria, L., and its Bearing on 

 the Problem of Xeromorphy in Marsh Plants. Pp. 56 ; with 

 3 plates and 11 text-figs. (Ann. Bot.- xxvi.) 



8vo. 0.vford, 1912. Author. 

 Yorkshire Naturalists' Union. 



The Natnralist : a monthly illustrated Journal of Natural 

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Baud XXVI. Heft 67". Festschrift C.^rl Chun zum 60. Geburtstage, 

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