1890.] NATURAL SCIENCES OF PHILADELPHIA. 237 



biseriate, fusoid, about 6-nucleate becoming 5-septate, slightly 

 curved, nearly hyaline, 20-22 x 3 p.. 

 Leptosphaeria steironematis. 



On dead stems oi Steironema ciliatum, London, Canada, May, 1890. 

 J. Dearness. Perithecia gregarious around the nodes of the stem, 

 subepidermal, conic-hemispherical,.* mm. diam. raising the epider- 

 mis which is pierced by the obtusely conic ostiolum. 



Asci clavate-cylindrical, 75-100 x 15-20 /j-., with abundant fili- 

 form paraphyses. Sporidia biseriate, oblong, 3-septate, sometimes 

 slightly constricted at the septa, brown, obtuse at the ends, mostly a 

 little curved, 15-22 x 7-8 //.. 



Leptosphaeria brunellae. 



On dead stems of BruneUa vulgaris, London, Canada, May, 

 1890. Dearness, 1712. Perithecia scattered, minute (i-l mm.) 

 covered by the epidermis which is only slightly raised and barely 

 pierced by the papilliform ostiolum. Asci clavate-cylindrical, 7-5- 

 80 X 10-12 //. subsessile with filiform paraphyses. Sporidia biseri- 

 ate, fusoid, slightly curved, pale yellowish-brown, 8-septate, the next 

 to the upper cell swollen, 22-30 x 4 //.. Differs from L. pyrenope- 

 zizoides, Sacc, in its perithecia not collapsing and from L. parieta- 

 riae, Sacc, in its paler spores. 



Accompanied by perithecia containing fasciculate acicular sty- 

 lospores (Rhabdospora), 40-55 x 2-2? /j-. These perithecia are 

 white inside and rather larger. Other smaller perithecia contain 

 spores 4x1* /-».. {Phoma). 

 Leptosphaeria folliculata. 



On leaves of Carex folliculata. On pale white elliptical spots 2- 

 4x 1-1* mm. Perithecia buried in the substance of the leaf with 

 their apices slightly prominent, few on a spot (1-6), small 60-75 //. 

 diam. Asci clavate-cylindrical, 50 x 10-12 ,«. Spor. biseriate, oblong 

 or clavate-oblong 2-septate and slightly constricted at the septa, 12 

 -15 X 3 //. yellowish-brown, ends obtuse. Differs from the other 

 species on Carex in its distinct spots and smaller sporidia. 



Metasphaeria rubida. 



On a decaying log of P^afantts occidentalis, Flatbush, Long Island, 

 N. Y., Dec. 31, 1889. Rev. J. L. Zabriskie, 384. Perithecia gre- 

 garious, globose, minute (} mm.), sunk in the surface of the w'ood 

 with their apices and obtusely-conic ostiola projecting. On carefully 

 shaving off the ostiola the upper part of the perithecium is seen to 



