156 



6-7 //, subsessile, with obscure paraphyses. Sporidia biseriate, oblong- 

 fusoid, hyaline, 3-4-nucleate, becoming 3-septate, 12-15 x 3 ft. 



This species is very common around Newfield on fallen, decorti- 

 cated oak limbs. The surface of the wood is rather thinly clothed 

 with hairs of the same character as those on the perithecia, forming- 

 black, pubescent patches several centimeters in extent. We have 

 always found the sporidia hyaline. 



A. occidentkle, (E. & E.) 



Chcetomella{?) perforata, E. & E. Journ. Mycol. I, p. 153. 

 Venturia occidentalism E & E. 1. c. II, p. 43, Cke. Syn. 2897. 

 Exsicc. EH. & Evrht. N. A. F. 2d Ser. 2 141. 



Perithecia superficial, \-\ mm. diam., membranaceous and of 

 coarse, cellular structure, subhemispherical, with a small, circular 

 opening above, sparingly clothed with straight, black, continuous, 

 bristle-like hairs about equal in length to the diameter of the peri- 

 thecia, more thickly set around the orifice, paler and more or less sub- 

 stellate-tufted below. Asci subcylindrical. 75-100x7-10 ft, with 

 imperfect paraphyses. Sporidia oblong-fusiform, 3-septate when mature, 

 and constricted at the middle septum, or often at all the septa, nearly 

 hyaline, 20-25 x 4-5 ft. Most of the perithecia contain only stylo- 

 spores. Var. minor, on Artemisia Ludoviciana, has asci smaller 

 (50-60x6-8 ft), and paraphyses more robust; sporidia about 15x3 ft, 

 oval, and the middle cells slightly colored. 



On Cirsium discolor, Iowa (Arthur), on C. altissimum and Arte- 

 misia Ludoviciana, Ames, Iowa (Bessey), and Illinois (Burrill). 



A. Sequoiae, (Plowr.) 



Venturia Sequoice, Plowr. Grev. VII, p. 74. 

 Acanthostigma Sequoice, Sacc. Syll. 3604. 



Perithecia unequal, scattered, setulose above. Asci cylindrical, 

 70-100 fj. long, 8-spored. Sporidia somewhat unequal in length, 

 faintly triseptate, hyaline. 



On decaying foliage of Sequoia, California (Harkness). 



Specimens from Dr. Harkness have perithecia depressed-hemi- 

 spherical, 200-220 //. diam., clothed above with short spines 30-35 ft 

 long. Ostiolum conic-papilliform. ' Asci cylindrical, sessile, 55-65 x 

 5-6 ft. Sporidia biseriate, fusoid, yellowish, 1 -3-septate, nearly straight, 

 14-16x21//. 



A. spinosum, (Hark.) 



Rosellinia spinosa, Hark. Bull. Cal. Acad. Sci. Feb., 1884, p. 42. 



Perithecia superficial, gregarious, globose, 300 ft diam., bearing 



