Name requested: Pythium gracileMycologia 15 (4): 167. 23 (4): 254. 24 (3): 351. 25 (6): 534. 27 (2): 160, 162. 34 (2): 202. 36 (6): 638, 639. 41 (2): 171. 57 (3): 420. 63 (3): 518, 519, 520, 521, 525. 70 (2): 214. Mycology and Phytopathology [as Микология и Фитопатология] 2 (4): 269. 4 (6): 541. Sydowia 20 (1-6): 230. 37: 213. Transactions of the Mycological Society of Japan 21 (2): 263, 264, 265.
Heterotypic synonym: Pythium monospermumMycologia 23 (4): 254. 24 (3): 349, 350, 351. 34 (2): 198. 36 (6): 643. 41 (2): 171. 57 (5): 830. 61 (3): 505, 506. 63 (3): 518, 521, 523, 525, 533, 534. Mycology and Phytopathology [as Микология и Фитопатология] 4 (6): 542. 7 (6): 494, 496, 497. 8 (3): 195, 196, 197, 198, 199. Mycotaxon 25 (1): 105. Sydowia 20 (1-6): 230. 37: 216.