Seaver: The Hypocreales of North America 191 



Stromata small, tubercular, 1-2 mm. in diameter, whitish to 

 pink or flesh-colored, often floccose with the erect verticillate 

 conidiophores ; branches of the conidiophores ascending perpen- 

 dicularly and each bearing at its summit a single conidium; 

 conidia elliptical, hyaline, 5-8 X 3 mic. often granular within ; 

 perithecia occurring in dense clusters ranging from 3-5 to many 

 perithecia, clusters very variable in form ; individual perithecia 

 small, nearly globose with the prominent papilliform ostiolum, 

 smooth or only minutely rough, at first flesh-colored, when dry 

 becoming pale yellow or almost white, 200-300 mic. in diameter, 

 entire or occasionally collapsing becoming pezizoid ; asci clavate, 

 8-spored, 50 X S~7 mic; spores 2-seriate above, 1 -seriate below 

 or often irregularly crowded, fusoid with ends acute, a little con- 

 stricted at the septum, hyaline, 8-12 X 3-4 mic. 



On bark of various kinds of trees, Andromeda, Betula, Car- 

 pinus, Carya, Clethra, Citrus, Laurns, Magnolia, Platanus, Salix, 

 also on Yucca and old stump of Musa. 



Type locality : Pennsylvania. 



Distribution : New York to Missouri and Louisiana. 



Exstccati : Ellis, N. Am. Fungi, 677, 574. Ravenel, Fungi 

 Am. Exsicc. 645. Other specimens examined : Delaware, Com- 

 mons; Missouri, Demetrio (type of N. pallida Ellis & Everh.) ; 

 New York, Seaver, Shear; Pennsylvania, Schweinitz (type of 

 Sphaeria ochroleuca Schw.) ; also cotype of N. aureofulva Cooke 

 & Ellis, specimens of N. depauperata determined by M. C. Cooke, 

 and specimens of N. vulgaris Speg. and V erticillium tubercula- 

 rioide Speg. both from the herbarium of Spegazzini. 



The species seems to be very common in the east and south 

 and has been collected by the writer on several kinds of trees 

 and shrubs about New York City. The perithecial clusters are 

 quite variable in size and form and the perithecia themselves 

 variable in color but the species may usually be recognized by the 

 pale perithecia and small, fusoid spores. 



13. Creonectria seminicola (Seaver) 

 Nectria seminicola Seaver, Mycologia 1: 21. 1909. 



Conidial phase consisting of white mycelial growth covering the 

 substratum, finally heaping up at various points forming pinkish 

 stromata; conidiophores erect, much branched with branches 

 ascending perpendicularly, each bearing at its summit a single 

 elliptical, hyaline, conidium ; conidia 5-7 X 2-3 mic, with 1-2 oil- 



