48 HUMPHREY 



Howe. 



1898 The Anthocerotacese of North America. Bulletin of the Torrej Botan- 

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1899 The Hepaticse and Anthocerotes of California. Memoirs of the Torrey 

 Botanical Club, Vol. VII. 



Humphrey. 



1906 The Development of Fossombronia lotig-tseta Aust. Annals of Botany, 

 Vol. XX, No. LXXVII. 

 Jeffrey. 



1898 The Gametophjte of Botrychium virginianum. University of Toronto 

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 Kny and Bottger. 



1879 Ueber eigenthiimliche Durchwachsungen an den Wurzelharren zweier 

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Untersuchungen iiber die Lebermoose, Heft 2, Tafel 3. 

 1884 Ueber Bau und Entwicklung der Sporenhaute. Graz. 

 Loeb. 



1905 Pfliiger's Archiv, 107. 

 MacDougal. 



1908 The Influence of Light and Darkness upon Growth and Development. 

 Memoirs of the Nevv^ York Botanical Garden, Vol. II. 

 Osterhout. 



1906 On the Importance of Physiologically Balanced Solutions for Plants. 

 University of California Publications. Botany, Vol. 2, No. 10. 



Peirce. 



1906 Studies of Irritability in Plants. Annals of Botany, Vol. XX, No. 

 LXX. 

 Peirce and Randolph. 



1905 Studies of Irritability in Algse. Botanical Gazette, No. 40. 

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1889 Influence d'agents exterieurs sur I'organisation polaire et dorsiventrale 

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1898 Species Hepaticarum. Bulletin de I'Herbier Boissier, Vol. VI. 



