420 Arthur and Kern : Peridermium 



irregularly along the sides, about 2 cells thick, outer surface in- 

 folded and verrucose, inner more coarsely verrucose, numerous, 

 delicate, concolorous processes often projecting from apex and 

 from floor of aecium a short distance into the spore-mass, peridial 

 cells roundish or pyriform, walls thick, striate, lumen small ; aecio- 

 spores ellipsoid or rarely obovate, 16-23 by 25-31 /i, wall color- 

 less, uniformly thick, 3-4.5/*, rather coarsely verrucose, with a 

 rather inconspicuous smooth area at base often extending up one 



side. 



On small branches of Pinus rigida Mill., Newfield, New Jersey, 



May, 1890, J. B. Ellis (specimen in herbarium of N. Y. Bot. 



Garden). 



On small branches of Pinus virginiana Mill. (P. mops Ait.), 



Newfield, New Jersey, May, 1882,/. B. Ellis (in Ellis, N. A. F. 



no. 1 02 1). 



On small branches of Pinus sylvestris L., fruticetum of Mis- 

 souri Botanical Garden, St. Louis, Missouri, May, 1887, Z. H. 

 Pammel (specimen in herbarium of Missouri Bot. Garden). 



The authors have examined the type specimen in the herbarium 

 of the N. Y. State Museum at Albany, N. Y. It is a very small 

 fragment, and gave little material for study. So far as we can 

 judge, however, it is identical with the specimen at New York 

 City, the first one cited above, and the host appears to be the 

 same, that is P. rigida. The specimen is in the original wrapper, 

 and is labeled " on pine limbs in the spring, Newfield, New Jersey, 

 J. B. Ellis, no. 2040." In the original publication some doubt 

 was expressed regarding the type locality, but there is strong cir- 

 cumstantial evidence that the inscription on the type specimen 

 records the actual facts. In the original description emphasis is 

 laid on the form of the spores, which are said to be " obovate, 

 pyriform, or oblong- pyriform, accuminate below, .001 5-. 002 5 inch 

 long." It is further stated that "the acumination is generally 

 acutely pointed, and sometimes so elongated as to make the spore 

 appear clavate ; it is one of the most distinctive features of the 

 species.' 1 This description of the spores in both form and size, 

 corresponds to that of the smaller peridial cells, which were doubt- 

 less mistaken for spores. A drawing for a spore on the original 

 packet shows a small lumen, which is true for peridial cells, but 

 not for spores ; the measurement given is also twice too large for 

 spores. 



