REPORT OF THE STATE BOTANIST I9IO 57 



This is a small delicate, beautiful, and nearly uniformly colored 

 species. The small smooth disk is sometimes brown or yellowish 

 brown and in very young plants looks like a cap on the apex of 

 the small undeveloped pileus. It may possibly be an introduced 

 species. It is respectfully dedicated to its discoverer. 



Pileus tenuis, conicus, convexus campanulatusve, margine late 

 striatus, impohtus, albidus flavidusve, saepe in centro flavido- 

 brunneus ; lamellae tenues, 1-2 mm latae, liberae, confertae, albidae 

 flavidaeve; stipes supra leviter attenuatus, glaber, cavus, pileo in 

 colore similis, annulus parvus, persistens vel evanescens; sporae 

 late ellipsoideae, vel subglobosae, 5-7x4-6/^-. 



Leptonia longistriata 



Pileus conic or convex, submembranous, fragile, umbilicate, sub- 

 hygrophanous, squamulose, striatulate nearly or quite to the um- 

 bilicus both when moist and when dry, grayish brown; lamellae 

 thin, fragile, subdistant, eroded or wavy on the edge, whitish becom- 

 ing flesh color ; stem straight, slender, tough, glabrous, shining when 

 dry, hollow, colored like the pileus with a white mycelium at the 

 base; spores irregular or angular, uninucleate, 12-16 fj- long, 8-10 p- 

 broad. 



Pileus i-i . 5 cm broad ; stem 3-5 cm long, 1-2 mm thick. 



Ground by roadsides. Stow, Massachusetts. August. S. Davis. 



The distinguishing character of this species is the widely striated 

 margin which is suggestive of the specific name. 



Pileus conicus convexusve, submembranaceus, fragilis, umbilica- 

 tus, subhygrophanus, squamulosus, fere ad umbilicum striatulatus, 

 griseo-brunneus ; lamellae tenues, f ragiles, subdistantes, acie erosae 

 undulataeve, albidae deinde incarnatae; stipes strictus, gracilis, 

 lentus, glaber, in siccitate nitens, cavus, in colore pileo similis, basi 

 mycelio albido; sporae irregulares angularesve, uninucleatae, 12-16 

 x8-io //. 



Leptonia strictipes 



Pileus thin, campanulate or convex, obtuse or slightly umbilicate, 

 even or striatulate on the thin margin, yellow brown or dark brown ; 

 lamellae thin, narrow, close, adnate or slightly sinuate with a de- 

 current tooth, dusted and subincarnate by the spores ; stem long, 

 slender, straight, glabrous, hollow, equal or slightly tapering up- 

 ward, with a whitish mycelium at the base ; spores angular, uninu- 

 cleate, commonly with an oblique apiculus at one end, 10-14 t^ 

 long, 7-9 u broad. 



