Journal 



OF THE 



NEW-YORK MICROSCOPICAL SOCIETY, 



Vol. VII. JULY, 1891. No. 



THE FUNGUS, PESTALOZZIA INSIDENS. 



BY J. L. ZABRISKIE. * 



{Read March bth, iSgi.) 



This fungus I collected at New Baltimore,-near Albany, N. Y., 

 in 1872. I presented specimens to our State Botanist, Prof. 

 Charles H. Peck, and he reported it in his Twenty-eighth Report, 

 but the description has never been published. I take the oppor- 

 tunity to give that description now. 



Pestalozzia INSIDENS, n. sp. On bark of living trunks of 

 Ulmus Americana L. New Baltimore, N. Y., April, 1872. Acer- 

 vuli scattered, erumpent, discoid, 300-500 }x in diameter ; conidia 

 2,2 }x long exclusive of the bristles, and 12 /< in diameter, broadly 

 elliptical, slightly curved, 5 -septate, the four inner cells very 

 dark brown and slightly constricted at the septa, terminal cells 

 hyaline, the upper terminal cell nearly hemispherical, the lower 

 terminal cell conical and distinctly truncated at the union with 

 the basidium, each terminal cell obliquely prolonged in a stout, 

 curved, sometimes flexuous, gradually tapering, abruptly termi- 

 nated bristle; bristles 17 }x long; basidia slender, sometimes 

 branching below, and sometimes 214 /i long. 



Description of Plate 28. 



The figures are all magnified 6i» diameters. The central figure shows a mature 

 spore attached to its basidium, the latter being frequently found of this length. Near 

 the base of the basidium is seen a portion of a broken branch. The basidia are occa- 

 sionally found thrice branched. On the left is shown a mature detached spore, and on 

 the right an immature spore. 



