July 1907] Index to North American Mycology 161 



PiCEA eng-elmanni (Parry) Englm., host to Peridermium con- 

 orum-piceae (Rees) Arth. & Kern n. n. Bull. Torr. Bot. 

 Club, 33:432. Aug. 1906. 



PiCEA excelsa L., host to Peridermium conorum-piceae (Rees) 

 Arth. & Kern n. n. Bull. Torr. Bot. Club, 33 432. Aug. 

 1906. 



PiCEA mariana (Mill.) B. S. P. (Abies nigra Desf.), host to 

 Peridermium coloradense Arth. & Kern. Bull. Torr. Bot. 

 Club, 33 :426. Aug. 1906. 



PiCEA mariana (Mill.) B. S. P. (Abies nigra Desf.), host to 

 Peridermium conorum-piceae (Rees) Arth. & Kern n. n. 

 Bull. Torr. Bot. Club, 33 432. Aug. 1906. 



PiCEA mariana (Mill.) B. S. P. (Abies nigra Desf.), host to 

 Peridermium consimile Arth. & Kern n. sp. Bull. Torr. Bot. 

 Club, 33 :427. Aug. 1906. 



PiCEA pungens Englm., see Picea parryana {Andre) Parry. 



PiCEA rubra (Lamb.) Link (P. rubens Sarg.), host to Perider- 

 mium conorum-piceae (Rees) Arth. & Kern n, n. Bull. 

 Torr. Bot. Club, 33 432. Aug. 1906. 



Picea rubra (Lamb.) Link (Picea rubens Sarg.), host to Peri- 

 dermium consimile Arth & Kern n. sp. Bull. Torr. Bot. 

 Club, 33 1427. Aug. 1906. 



Picea rubens Sarg., see Picea rubra (Lamb.^i Link. 



Pine wood, host to Humaria lacteo-cinerea Rehm n. sp. Ann. 

 Mycolog. 3:517. Dec. 1905. 



Pine, decaying wood, host to Lentinus spretus Peck n. sp. N. 

 Y. State Mus. Bull. 105 (Bot. 9) :24. Aug. 1906. 



PiNus palustris Mill, cones, host to Caeoma strobilina Arth. n. 

 sp. Bull. Torr. Bot. Club, 33:519. Oct. 1906. 



PiNus taeda L., cones, host to Caeoma strobilina Arth. n. sp. 

 Bull. Torr. Bot. Club, 33 :5i9. Oct. 1906. 



PisciDiA erythrina, host to Ravenelia piscidiae Long n. sp. Jour. 

 Mycol. 12:234. Nov. 1906. 



PiTHECOCTENiuM hexagouum DC, host to Prospodium amphi- 

 lophii (D. & H.) Arth. n. n. Jour. Mycol. 13:31. Jan. 1907. 



PiTHiACYSTis Smith & Smith n. gen. closely intermediate between 

 Saprolegnieae and Peronosporeae. Bot. Gaz. 42:215-221. 

 Sept. 1906. 



PiTHiACYSTis citrophthora Smith & Smith n. sp., parasitic on 

 Lemons and occasionally on other Citrus fruits. Bot. Gaz. 

 42:221. Sept. 1906. 



