342 



beneath the epidermis. Asci oblong-cylindrical, 75 x 22 p, subsessile, 

 paraphysate. Sporidia biseriate, straw-yellow at first, becoming dark 

 brown, 3-septate and constricted in the middle, ends rather acute, with 

 a longitudinal septum extending across the two middle cells, 20-24 x 

 10-11 p, subinequilateral. 



On dead herbaceous stems, common in the Rocky Mountain region. 



The sporidia like those of Pt.planispora, and PL aurea are more 

 or less distinctly flattened. 



PL gigaspora, Karst. Hedwigia 1884, p. 37. 



Pleospora amplispora, $. & E. Bull. Wash. Coll. Lab. Nat. Hist. 1884, p. 41. 



Perithecia scattered, superficial, black, subglobose or hemispheri- 

 cal, J mm. diam., collapsing when dry. Ostiola short, cylindrical or 

 subconoid. Asci oblong, 250 x 75 p (paraphysate)? Sporidia oblong, 

 obtuse, slightly constricted in the middle, 12-16-septate, muriform, 

 60-75 x 20-24 p, yellow-brown becoming dark brown. 



On dead stems of Lupinus, Mt. Paddo, Washington (Suksdorf). 



PL diaporthoides, E. & E. (in Herb.) 



Perithecia scattered or subseriate, buried, minute ( mm.), with 

 rather thick, subcoriaceous walls, often in series of 3-4 lying close 

 together. Ostiolum exserted, short-cylindrical, rough, except the 

 smooth, black, depressed-conical tip. Asci 75-85x12-15 p, substipi- 

 tate, p. sp. 60-70 p long, with paraphyses. Sporidia uniseriate or 

 subbiseriate above, oblong-elliptical, subinequilateral, ends obtusely 

 pointed, 3-septate, with a more or less perfect longitudinal septum, 

 14-18x7-8,7. 



On dead stems of Pastinaca sativa with Ophiobolus Bardance, 

 Fckl., Newfield, N, J., July, 1890. 



Differs from Pleospora microspora, Niessl., in its habitat, and 

 constantly 3-septate, rather smaller sporidia, and more prominent 

 ostiola. 



PL lactucicola, E. & E. Journ. Mycol. IV, p. 64. 



Perithecia scattered, suberumpent, depressed -hemispherical, 175- 

 200 p diam. Ostiolum papilliform. Asci clavate-cylindrical, 90-100 

 x 10-12 p.. Sporidia obliquely uniseriate or rarely subbiseriate above, 

 oblong, slightly constricted, 3-septate, with each of the middle cells 

 divided by a longitudinal septum, ends subacute and suboblique, 

 14-16 x 6-7 p.. Allied to PI. Bardance, Niessl., but, compared with 

 the specimens of that species in Linhart's Fungi Hungarici, No. 168, 



