325 

 G. amcena, (Nees.), var. petiolorum, (Schw). 



SphcEria petiolorum, Schw. Syn. Car. 153. 



Gnomonia amcena, Nees. -vb-T. petiolorujn, Schw. Cke. Syn. 3S40. 

 Kxsicc. Rav. Fungi Car. I, No. 64.— Kll. & Kvrht. N. A. F. 2d Ser. 2543. — Rav. F. Am. 374. 



Perithecia gregarious, bwied, about 400 n diara., the slender 

 ostiolum about 1 mm. long, rising through a white, granular, superficial 

 tubercle. Asci clavate, p. sp. 18-22x6 ji or, including the slender 

 base, 30-35 ji long. Sporidia fasciculately crowded, narrow-fusiform, 

 nearly straight, 10-12 x 1|-1| /z, 3-4-nucleate, hyaline, continuous. 



On fallen and decaying petioles of lAquidamhar, Carolina, Lou- 

 isiana and New Jersey, (sec. Peck also on fallen petioles of ash, New 

 York). 



The typical form is found in Europe on petioles and leaves -of 

 Corylus, and has, sec. Sacc, asci 36 x 8 /< and sporidia 8 x 4 /i, contin- 

 uous and 2-4-nucleate ; sec. Winter, asci 45-50 x 9-10 fi, sporidia 

 fusoid, acute, septate and constricted in the middle, hyaline, 12-16 x 3 

 -31 II. 



Gi. exc^ntrica, (C. & P.) 



Sphtxria excentrica, C. & P. 25th Rep. N. Y. State Mus. p. 105. 

 Gnomoniella excentrica , Sacc. Syll. 1585. 

 Gnomonia excentrica^ Cke. Syn. 3857. 



Perithecia scattered, depressed, black, at first covered by the 

 epidermis, which is pierced by the excentric or lateral, curved, acute, 

 rostellate ostiolum ; at length superficial. Asci subclavate. Sporidia 

 crowded or biseriate, subfusiform, 4-nucleate, hyaline, 8|-9 // long. 



On dead stems of Polygonum, New York State. 



G. vulgaris, Ces. & De Not. Schema, p. 58. 



Sphcsria Gnomon, Tode Fungi Meckl. II, p. 50, fiff. 125- 

 Ceratosioma Gnomon, Fr. S. M. II, p. 497. 

 Cryptosphcsria Gnomon, Grev. Flora Edin. p. 360. 

 Gnomoniella vulgaris, Sacc. Syll. 1578. 

 Exsicc. Rab. F. E. 1453.— Rehm Asc. 95.— Thum. F. Austr, 163.— Thum. M. U. 562. 



Perithecia scattered, hypophyllous, at first sphasroid, covered, 

 then emergent and collapsed, bea,k elongated, straight, often a little 

 thickened towards the end, as long as, or a little longer, than the 

 diameter of the perithecium. Asci elongated-fusoid, briefly stipitate, 

 32-42 X 5-6 /A Sporidia conglobate, rod-shaped, subacute, 4-nucleate, 

 straight or slightly curved, hyaline, 12-18 x 1-2 fi. 



On leaves of Ostrya Virginica, Troy, N. Y. (Peck). 



