48 Thitry-fourth Annual Report of the 



are but one or two on a leaf, in other instances they are so numerous 

 that nearly all the leaf is discolored. The flocci usually occur on the 

 cinereous part of the spot. They are so compactly united in a mass at 

 the base that when viewed through a handglass they appear like some 

 minute species of Venturia. 



(Jercospora clavata, Get. Spots small, numerous, irregular, indefi- 

 nite, often confluent ; flocci hypophyllous, minutely tufted, abundant, 

 short, thick, subflexuous, subnodulose, colored, .001 in. to .0015 in 

 long ; spores very unequal in length, cylindrical or bacillary, slightly 

 colored, .0015 in. to .005 in. long, three to seven-septate. Living 

 leaves of Asclepias incamata. Albany. Sept. This species is very 

 closely related to the preceding one. The flocci and spores are nearly 

 alike in both, but the external appearance of the two is quite different. 

 In this species the spots are small and numerous and have no cinereous 

 center ; the flocci are on the lower surface of the leaf and the tufts are 

 so numerous and crowded that, with the spores, they form a continu- 

 ous velvety stratum. It is Helmintliosporium clavatum, G-er. 



Oercospora Bcehmerise, n. sp. Spots small, numerous, often con- 

 fluent, angular, limited by the veinlets, brownish, sometimes becom- 

 ing arid and grayish ; flocci hypophyllous, tufted, short, subflexuous, 

 colored ; spores subcylindrical or bacillary, generally curved, four or 

 five-septate, colored, .0016 in. to .0035 in. long. Living leaves of 

 the false nettle, Bwlimeria cylinclrica. South Ballston. Sept. The 

 tufts are very numerous but so minute that they are scarcely visible to 

 the naked eye. They are compactly united at the base in a sort of 

 sclerotoid mass as in C. ventnrioicles. The spots, though numerous, 

 are not very conspicuous because of their dull, pale color. 



Oercospora Acalyphae, n. sp. Spots very small, orbicular, arid, 

 whitish with a narrow purplish-brown border ; flocci epiphyllous, 

 tufted, subflexuous, septate, colored ; spores slender, bacillary, five to 

 seven-septate, colorless, .002 in. to .003 in. long, .00016 in. broad 

 in the widest part. Living leaves of three-seeded mercury, Acalypha 

 Virginica. Albany. Sept. 



Verticillium candidum, n. sp. (Plate 2, figs. 11-13.) White; fer- 

 tile flocci erect, septate, branched, the branches opposite or verticillate, 

 sometimes with verticillate ramuli ; spores terminal, globose, colorless, 

 .00016 in. to .0002 in. in diameter. Decaying wood and bark in 

 damp secluded places. Helderberg mountains. Oct. and Nov. It 

 forms more or less extensive thin, white patches. The sterile flocci 

 are usually thicker than the fertile. 



Diplocladium minus, Bon. Decaying Agarics and Polypori. Hel- 

 derberg mountains. Nov. It forms dense felty patches of intricate 

 white filaments on the soft decaying substance of the matrix. It is 

 distinguished from Verticillium epimyces by its clear white color and 

 uniseptate spores. 



Fusisporium tenuissimum, n, sp. Tufts superficial, very minute, 

 lax, forming thin subpulverulent whitish patches; flocci branched, 

 colorless, subconglutinate at the base ; spores fusiform, straight or 

 curved, three to five-septate, colorless, .0008 in. to .0016 in, long, .00016 

 in. to .0002 in. broad. Dead stems of herbs. Schenectady. Sept. 

 The tufts are so minute that they appear to the naked eye like patches 



