174 



The conidial stage, Helminthosporium Clavariarum, Desm., has 

 conidia elliptical or elongated-elliptical, 1-2-celled, brown, 15-20 x 8 n, 

 borne singly or 2-3 together on the ends of the fertile hyphae. 



R. rhyncospora, Hark. Bull. Cal. Acad. Sci. Feb. 1884, p. 42. 



Perithecia densely crowded, globose-conical, superficial, covering 

 large areas, studded all over with short, black spines. Asci 8-spored, 

 cylindrical, 96 x 10 //, with filiform paraphyses. Sporidia oval or 

 elliptical, dark brown, continuous, 15-18 x 9 ^, often prolonged above 

 into a curved beak J-| as long as the body of the sporidium. 



On decorticated branches of Sambucus glauca, California. 



R. foveolkta, (B. & C.) 



Spktsriafoveolata, B. & C. Cuban Fungi, No. 847. 

 Rosellinia foveolata, Sacc. Syll. 996. 



Perithecia globose, at length collapsing, clothed with rigid hairs, 

 seated on an effused, black stroma composed of hyphse with acutely 

 pointed branches. Sporidia hemispherical, foveolate, 5 /i diam. 



Sporidia resembling the seeds of a Veronica. 



R. arctespora, (C. «& E.) 



SpkeEria arctespora, C. & K. Grev. V, p. 93. 



SphcEria deionsa, Ckeand Spkceria Xylarieespora, C. & 13. Grev.' VI, p. 94. 

 Rosellinia arctispora, Sacc. Syll. 984. 

 Exsicc. Ell. N. A. F. 594. 



Perithecia gregarious or crowded, ovate, about \ mm. diam., 

 clothed with a black, farinose tomentum, and with short spines about 

 like those of R. ligniaria. Asci (p. sp.) about 15xQ p, with a narrow, 

 stipe-like base. Sporidia overlapping-uniseiiate, oblong-fusoid, brown, 

 subinequilateral, 12-14 x3|-4 fi, resembling the sporidia oi Xylaria. 



On wood of Andromeda, under the bark, Newfield, N. J. 



R. Rattus, (Schw.) 



SphcBria Rattus, Schw. Syn. N. Am. No. 1535. 



Sphieria ranella, B. & Rav. Grev. IV, p. 107. (sec. Cke. Grev. XVI, p. 17). 



ConiochiZta Rattles, Cke. Syn. 2789. 



Rebentischia ranella, Sacc. Syll. 2894. 



Perithecia gregarious or scattered, rather large, very fragile and 

 thin, glabrous, globose-conical, with a subobtuse, black, at length bare 

 ostiolum, which, at first, as well as the peritheciuni, is covered with a 

 black, densely hairy pellicle, the hairs cinereous-brown and divergent, 

 resembling a rat-skin. When young, the perithecia are immersed, 

 with only the hairs erumpent, but finally they emerge and become 



