Seaver: North American Hypocreales 



of the exposed surface of the seed ; individual perithecia nearly 

 globose, with a minute, papilliform ostiolum, smooth or nearly 

 so, 250 mic. in diameter, at first orange, fading in drying to 

 golden-yellow or whitish ; asci clavate, 40-50 mic. long, 8-spored ; 

 spores mostly 2-seriate or irregularly crowded, hyaline, 1 -septate, 

 a little constricted at the septum, 10-14 X 3—3.5 mic. 



On partially decayed seeds of skunk-cabbage (Spathyema 

 foetida). 



Type locality: New York City. 



Distribution : Known only from type locality. 



The perithecia and spores of this species do not differ mater- 

 ially from some of the species of the genus which occur on 

 bark of various trees. However, the habitat, which is in itself 

 interesting, and the peculiar appearance of the conidial phase 

 seem to distinguish this form from any of the species examined. 



A specimen collected in the propagating house of the New 

 York Botanical Garden on beans which had been used for ex- 

 perimental purposes and allowed to partially decay corresponds 

 so far as we can see with those occurring on the seeds of skunk- 

 cabbage. 



Explanation of Plate II. 

 Figs. 1-4. Hyponectria dakotensis sp. nov. 



1. Habitat, showing plants natural size. 



2. Ostiolum as it appears enlarged (surrounding epidermis diagrammatic). 



3. Ascus with spores, X 2,000. 



4. Two spores showing oil-drops within, X 2,500. 



Figs. 5-9. Nectria semenicola sp. nov. 



5. Habitat, showing plants natural size, 



6. Cluster of perithecia showing gross characters. 



7. Conidiophore with conidia, X 400. 



8. Ascus with spores, X 2,000. 



9. A single spore, X 2,500. 



