26 ANDERSON: DASYSCYPHA RESINARIA CAUSING 
hyphae (1 to 2), from which they grow. The pili are shortest 
on the stipe of the ascoma (40 long) and longest on the margin of 
the cup (80), where they form a fringe of hairs which project 
vertically upwards, when the cup is moist and open, but are 
turned inwards, almost covering and meeting in the center of the 
disc, when the ascoma is dry (jig. 6). 
This movement of the fringe of pili, surrounding the disc, is a 
hygroscopic one, due to tissue tensions. Thus the longer, thicker- 
walled and more compact peridial hyphae, running up and down 
and almost parallel with each other and with the surface of the 
ascoma, would, on drying, contract less than the medullary por- 
tion, consisting of loosely interwoven and thinner-walled hyphae, 
running more or less in all directions. As a consequence, when 
the ascoma dries the greater contraction of the medullary portion 
tends to pull in, or draw down, the hymenium, making it more 
concave, and at the same time causing an inward curvature of 
the fringe of hairs which project from the margin of the peridial 
portion extending around the hymenium. The pili or projecting 
hyphae, forming the fringe, do not curve, but remain at the same 
angle to the peridial substratum which makes this hygroscopic 
movement. ; 
The pili, projecting from the surface of the ascoma, especially 
those forming the fringe around the disc, are dotted over with 
minute particles of, what appears to be calcium carbonate (jig. 6). 
The particles disappear when sections are placed in a weak solu- 
tion of either acetic or hydrochloric acid. I have not been able to 
notice any evolution of carbon dioxiode from acid treated sections 
under the microscope. The differences in color of the ascoma in 
its wet and dry condition, is due partly to the presence of these 
particles on the pili. 
IDENTIFICATION OF THE FuNGUS 
The ascomata, as well as the cankers, in their external char- 
acters, resembles those of Dasyscypha calycina (Schum.) Fuckel, 
which has been found in the United States. It was collected by 
Judge Peters in Alabama, on Finus.* Tubeuf also states that the 
* Underwood, L. M., and Earle, F. S., A preliminary List of Alabama Fungi. 
Bull. Ala. Agric. Exp. Sta. 80: 202. 1897. 
