112 NEW YORK STATE MUSEUM 



Leptonia davisiana 



Pileiis tenuis, submembranaceus, convexus, deinde planus vel late 

 depressus, fragilis, glaber, centre leviter squamulosus, siccus saepe 

 late striatus, nigrescente brunneus; lamellae tenues, confertae, sub- 

 ventricosae, adnexae, albae, deinde incarnatae et pulverulentae ; 

 stipes gracilis, aequalis, glaber, farctus cavusve, pileo in colore 

 similis; sporae angulares, uninucleatae, 10-12x8-10 fi. 



Pileus 1-2.5 cm latus; stipes 1.5-3 cm longus, 1-2 mm crassus. 



In locis gramineis. 



Leptostromella scirpina 



Perithecia epiphylla vel rare amphigena, suborbicularia vel 

 oblonga, discoidea concavave, subsuperficialia, atra; sporae sub- 

 bacillares, hyalinae, curvae, continuae, utrinque acutae, 20-25 x 2-3 fi. 



In foliis emortuis Scirpi atrovirentis Muhl. 



Lysurus borealis serotinus 



Pars externa loborum receptaculi alba; lineae candidae ab basi 

 stipitis radiantes, aequales in numero receptaculi lobis, plagasque 

 lineares in superficia interna volvae formantes. 



Macrophoma burserae 



Perithecia minuta, 100-200 fi lata, epidermide tecta, gregaria vel 

 aggregata et pustulas parvas inaequales leviter prominentes et saepe 

 confluentes formantia. atra, intus alba; sporae ellipsoideae, subhya- 

 linae, 16-20 x 10-12 fi. 



In cortice Burserae gummiferae Jacq. 



Macrophoma numerosa 



Perithecia minuta, .3-. 5 mm lata, dense gregaria, membranacea, 

 in cortice nidulantia, erumpentia, atra, intus albida; sporae oblongae 

 fusiformesve, continuae, interdum binucleatae, utrinque acutae, 

 12-20 X 3-4 fi; sporophores brevissimi vel obsoleti. 



In ramulis emortius Robiniae pseudacaciae L. 



Morchella conica serotina 



Pileus conicus vel irregularis, apice subactus vel late rotundatus, 

 interdum perforatus, saepe sterilis et brunnescens, costis acie 

 albidis ; stipes minute squamulosus. Serotina. October et 

 November. 



