142 \QUATIC PHYCOMYCETES 



Olpidium luxurians (Tomaschek) Fischer 

 Rabenhorst. Kryptogamen-FJ., 1 (4): 29. 1892 

 Chytridium luxurians Tomaschek, Sitzungsber. Acad. Wiss. Wien (Math.- 



Nat. CI.), 78: 204, figs. 1, 3-4, 6-11. (1878) 1879. 

 Diplochytrium sp., ibid., p. 198. 



Chytridium pollinis-typhae forma latifoliae, ibid., p. 203. 

 Olpidium diplochytrium (Tomaschek) Schroeter, Kryptogamenfl. Schle- 



sien, 3 (1): 181. 1885. 

 Olpidiclla diplochytrium Lagerheim, Journ. de Botanique, 2: 439. 1888 



Sporangia spherical or ovoid, up to thirty in a pollen grain, of differ- 

 ent sizes, up to 40 \x in diameter, wall smooth, colorless, discharge 

 tube narrow, often somewhat curved and prolonged outside the sub- 

 stratum; zoospores somewhat elongate, with rounded apex and nar- 

 row end, 2 u, in diameter, movement even or undulate, swimming; 

 resting spore spherical or somewhat ellipsoidal, 20 u, in diameter, 

 with a thin smooth wall and a large oil globule, resting in a larger, 

 thick-walled structure 24 \i in diameter, upon germination forming 

 zoospores. 



In pollen of Pinus, Taxus, Lilium, Typha, Cannabis, etc., Tomaschek 

 (be. cit.), Austria; Pinus, Schroeter (1885: 181), pollen, Minden 

 (1915:240), Germany; Picea excelsa pollen, Rostrup (1896:126), 

 Petersen (1910: 554, fig. 25a), Denmark; Pinus koraiensis, Skvortzow 

 (1927:206), Manchuria; pine pollen, Gaertner (1954b: 20), Egypt, 

 Northwest Africa, West Africa, South Africa; Gaertner (op. cit., 

 p. 40), Sweden. 



The resting spores usually germinated after the disintegration of the 

 pollen grain. 



Olpidium uredinis (Lagerh.) Fischer 

 Rabenhorst. Kryptogamen-Fl., 1 (4): 30. 1892 



Olpidiclla uredinis Lagerheim, Journ. de Botanique, 2: 438, pi. 10, figs. 

 1-15. 1888. 



Sporangia spherical when occuiring singly, or angular and smaller 

 when there is more than one in the host cell, 26 \x in diameter, with 

 a delicate hyaline or subhyaline smooth wall, forming a short discharge 

 tube which pierces the wall, or only a papilla; zoospores ellipsoidal, 

 posteriorly uniflagellate, with a single globule, 3-4 [x in diameter; resting 



