LITERATURE CITED 147 



spora Spinaciae (Grew.) Laub.), Arkiv for Botanik, 15(15) :l-25. Pis. 1-4. 



Figs. 1-3. 1919. 

 Fischer, Alfred: Phycomyceten: Pythium, in L. Rabenhorst: Kryptogamen- 



Flora von Deutschland, Oesterreich unci der Schweiz, Zweite Auflage, Band 



1, Abt. 4, pp. 393-410. Figs. 64-65. Leipzig, Verlag von Eduard Kummer, 



1892. 

 FiTZPATRicK, Harry Morton: Generic concepts in the Pythiaceae and Plasto- 



cladiaceae, Mycologia, 15:166-173. 1923. 

 ■ : The Lower Fungi — Phycomycetes, xi + 331 pp. 112 figs. New York, 



McGraw-Hill Book Co., 1930. 

 Gaumann, Ernst : Uber die Spezialisation der Peronospora auf einigen Scrophu- 



lariaceen, Ann. MycoL, 16:189-199. Figs. 1-6. 1918a. 

 : Ueber die Formen der Peronospora parasitica (Pers.) Fries. Ein Beitrag 



zur Speziesfrage bei den parasitischen Pilzen, Botan. Centr. Beihefte, Erste 



Abt., 35:1-143, 395-533. Figs. 1-47. 1918b. 

 -: Beitrage zu einer Monographic der Gattung Peronospora Corda, Beitrdge 



zur Kryptogamenflora der Schweiz, 5(4):l-360. Figs. 1-166. 1923. 

 Gregory, C. T.: Spore germination and infection with Plasmopara viticola, 



Phytopathology, 2(6) :235-249. Figs. 1-7. 1912. 

 HiURA, M.: A simple method for the germination of oospores of Sclerospora 



graminicola. Science, N.S., 72 :95. 1930. 

 Hoerner, G. R.: The infection capabilities of hop downy mildew, /. Agr. Re- 

 search, 61(5):331-334. Fig. 1. 1940. 

 HoHNK, Willy: On three Pythiaceous Oomycetes, Botan. Centr. Beihefte, Abt. A, 



55(l):S9-99. Fi^s. 1-4. 1936. 

 Jones, Fred R., and J. H, Torrie: Systemic infection of downy mildew in 



soybean and alfalfa. Phytopathology, 36(12) :1057-1059. Fig. 1. 1946. 

 Klebahn, Heinrich: Krankheiten des Flieders, 75 pp. 45 figs. BerUn, Gebriider 



Borntraeger, 1909. 

 Matthews, Velma Dare: Studies on the Genus Pythium, 136 pp. 29 pis. Chapel 



Hill, Univ. North Carolina Press, 1931. 

 McDoNOUGH, E. S. : The nuclear history of Sclerospora graminicola, Mycologia, 



29(2):151-172. Figs. 1-2. 1937. 

 : A cytological study of the development of the oospore of Sclerospora 



macrospora (Sacc), Trans. Wisconsin Acad. Sci., 38:211-218. Figs. 1-8. 



1946 (1947). 

 Melhus, I. E.: Perennial mycelium in species of Peronosporaceae related to 



Phytophthora infestans, /. Agr. Research, 5(2):59-70. PL 3. Fig. 1. 1915. 

 MiDDLETON, John T.: The taxonomy, host range and geographic distribution 



of the genus Pythium, Mem. Torrey Botan. Club, 20(1):1-171. Figs. 1-17. 



1943. 

 MiLBRATH, D. G. : Downy mildew on lettuce in California, /. Agr. Research, 



23(12) :989-994.P/s. 1-3. 1923. 

 von Minden, M.: Beitrage zur Biologic und Systematik cinheimischer submerser 



Phycomyceten, Mykologische Untersuchungen und Berichte, l(2):146-255. 



Pis. l~8. Figs. 1-26. 1916. 

 Mundkur, Belaji D.: Morphology and cytology of development of the sex 



organs of Phytophthora himalayensis Dastur, Botan. Gaz., 110(3) :475-486. 



Figs. 1-28. 1949. 

 Murphy, Paul A. : The production of the resting spore of Phytophthora infestans 



on potato tubers, Sci. Proc. Roy. Soc. Dublin, 18(34) :407-412. PL 18. 1927. 

 Narasinhan, M. J.: Studies in the genus Phytophthora in Mysore: I. Hetero- 



