696 



lips well rounded, closely connivent. Sporidia variable, elongated- 

 clavate, elliptical and ovoid, 1-3-septate, pale brown, (hyaline at first), 

 14-25x5 fi. 



On decorticated oak, New York (Gerard). 



H. prfeWngum, Schw. in Duby, Hyst. p. 27 (not Schw. Herb.). 



Perithecia lying parallel, linear, narrow, more or less elongated, 

 faintly transversely rugulose, black, shining; lips swollen and closely 

 connivent. Asci obovate, shorter than the filiform paraphyses which 

 are thickened and united above. Sporidia biseriate, ovate, l|-2 times 

 as long as broad, rounded at the ends, hyaline and homogeneous at 

 first, at length 3-septate, dark red-brown and finally opake. 



On dry, dead wood, New Mexico (Curtis). 



This is very different from the H. prcdongum in Herb. Schw., 

 which is Hysterographium Uneolatum, (Cke.). 



H. insidens, Schw. Syn. N. Am. 2078, 



(Hyslerium Berengerii, Sacc. F. Veil. Ser. IV, No. 50)? 

 Hysterium complanatum, Dnby, Hyst. p. 26, 

 Exsicc, Ell. N. A. F. 460, 



Seated on a widely effused, black crust. Perithecia short, scat- 

 tered, thick, oblong-ovate, subtruncate, generally contracted into a 

 pseudo-stipitate base, obtuse at the ends. l:)lack; lips gaping, inflexed. 

 This is the diagnosis given by Schweinitz. The specimen in Herb. 

 Schw. does not show any black crust, nor can the perithecia be called 

 even pseudo-stipitate; they are only erumpent-superficial, |-1J mm. 

 long, obtuse, mostly lying parallel. Asci about 75 x 15 [i. Sporidia 

 overlapping, subbisei'iate, fusoid, slightly curved, 6-8-septate, with one 

 joint (about the third from the top) slightly swollen, reddish-brown, 

 ends narrowed but subobtuse, 25-30 x 6-8 /x. 



Found by Schweinitz in Carolina, on hard, decaying wood. Speci- 

 mens collected at Poughkeepsie, N. Y., on old chestnut wood, have 

 the s]:)oridia 30-40 x 7-9 //, which is about the size of those in a spec, 

 on an old pine shingle found at Newfield, N. J. Sec. Cooke, Grev. 

 XVII, p. 88, the sporidia in an authentic spec, from Schweinitz, are 

 45-50 X 15 n, with one cell swollen (as above). 



The specimens in N. A. F., 460, were determined by Gerard from 

 authentic specc. of .S". complanatum, sent him by Duby. The species 

 seems to be a variable one, both in the form of the perithecia and in the 

 number of septa in the sporidia. Duby says 3-5-septate. In the 

 N. A. F. specc. the sporidia are 3-7 (mostly 5-) septate and 25-30 x 

 7-8 p.. Some of the specc. distributed in N. A. F. have the perithecia 

 at first tuberculiform and slightly contracted at base ("versus basin 



