62 
pinnules are generally the longest, sometimes the upper series vary 
alternately with one or two as long as or longer than the lower, mak- 
ing an irregular outline. The shape of the segments and ultimate 
divisions varies considerably, but, in holding a fertile frond to the 
light, the general appearance is that of being finely cut into numerous 
ligulate divisions with cuneate bases. The young fronds before 
being unrolled (crosiers) are completely enveloped in a dense cov- 
ering of whitish scales. The dimensions given for this species will 
no doubt be found to vary as more of it is collected. My thanks are 
due to Mr. Faxon for the pains he has taken with the drawing. The 
excellence and accuracy of his work is now too well known to need 
any special commendation, and the present drawing speaks for itself. 
By a happy coincidence I am able to announce a double dis- 
covery by Mr. Pringle, and to accompany my description of his 
charming fern with a description by Mr. Peck of a new species of 
fungus found growing on the epidermis of the lamina in the form of 
pretty orange-colored dots, which, under the glass, resemble little cups 
filled with bright yellow spores. Mr. Peck has very kindly sent me 
his manuscript description, and expressed a wish to have it accom- 
pany my own description of the fern upon which the fungus grew, 
and it is accordingly given hereafter. 
Explanation of Plate xxxiv. — i. Plant, natural size. 2, Enlarged pux- 
nule (second lower phuiule on second pinna. 3. Segment enlaiged. 4, Lobe 
with one indusium turned back. 5. Scale from back of frond. 6. Scale from 
rhizoma, 7. Sporangium, 8. Spore, 
A New Fern Rust. 
By Chas. H. Peck. 
CiEOMA Cheilanthis, ft. sp. — Spots indefinite, pallid or pale yel- 
low ; sori minute, rotund, slightly prominent, hypophyllous or occa- 
sionally amphigenous ; spores globose or broadly obovate, regular, 
bright luteous or orange colored, .00065 to .0009 of an inch long. 
Living fronds of Cheilanthes Fringlei^ Davenport, Arizona. May. 
Collected by C. G. Pringle ; communicated by G. E. Davenport. 
This fungus, though closely resembling Cceoma filicuin Lk,, 
{Uredo filictim^ auct-), in external appearance, is readily distin- 
guished from that species by its smaller, more regular and mostly 
j;lobose spores. In C. fih 
or less angular 
and .0008 to .00 CI of an inch long. In C Aspidiotiis {Uredo Aspidi- 
otus^ olim) which is regarded by some mycologists as a form of C 
filicum, not only is the external habit different from that of both 
the preceding species, but also the prevailing form of the spores is 
more elongated and their length ranges from .0012 to -0017 of an 
inch, 
Arceuthobium in New Hampshire. — I recently found near this 
place, in a swamp, on spruce trees, Arceuthobiufn pusilliim^ Peck (^. 
minutum^ Engb). The plants were in fruit (last season's plants), and 
the trees to which they were attached were in a dying condition. I 
have looked for ArceutJwblum here before, but must have overlooked 
it, or it may be that it is of recent introduction here, which I doubt. 
Hanover, N. H 
J 
