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T. clavellosum. I have not been able to secure Ceylon specimens re¬ 
ferred to T. clavellosum , but it is quite likely that all such are referable 
to T. Thicaitesii. Of this latter I have secured au authentic specimen 
from Mr. J. B. Ellis, to whom it was sent by Dr. M. C. Cooke, of Lon¬ 
don, England. As T. clavellosum and T. Thwaitesii are related species it 
is easy to understand why confusion should arise concerning them, 
especially when we consider the meager published description in which 
spore measurements are entirely omitted. T, Thicaitesii is a quite dis¬ 
tinct species from North American forms of T. clavellosum , and it is 
pretty safe to say that T. clavellosum is American and that T. Thicaitesii 
is Asiatic. I have, in the following, drawn up full descriptions of the 
two species. For the description of T. clavellosum I selected No. 844 of 
De Thiimen’s Mvcotheca Universalis on Aralia nuclicaulis , collected in 
the Adirondack Mountains, New York, by Ch. H. Peck. For the de¬ 
scription of T. Thwaitesii I used the small specimen sent me by Mr. 
Ellis. 
Triphragmium clavellosum, Berk. 
Epipliyllous; sori small, roundish-orbicular, or elliptical, surrounded 
by the ruptured epidermis and distinct, or as often confluent into ap¬ 
parently one large sorus, a quarter of au inch across, growing on more 
or less well defined spots. Uredospores not seen; teleutospores 30-40^ 
long by 16-30/* wide, globose to obovate or oblong in outline, the 
margin frequently not at all lobed, dark brown to almost black, epi- 
spore thickened and with numerous stout somewhat tapering appen¬ 
dages, the tips of which are emarginate, bifurcate, or even quadrate 
with four hyaline recurved lobes; pedicel at least as long as the spore, 
usually longer, 40-100 by 5-10/* thick at junction with base of spore, 
average size about 50 fu long by Gja thick, not much tapering and some¬ 
what roughened. On Aralia nudicaulis. 
Triphragmium Thwaitesii, B. & Br. 
Amphigenous, but most abundant on the upper surface of leaf; sori 
small, roundish, rarely confluent, growing on well defined irregular 
patches, which are blackish above and paler below. Uredospores (?) 
28-35 by 30-50/1, oval to obovate, rather dark yellowish brown, epis- 
pore thickly beset with sharp awl-shaped spines about 3ju long; pedicel 
about length of spore, hyaline; teleutospores 30-GO/i long by 27-59yu 
wide, globose to obovate outlined, more or less perfectly and uniformly 
three-lobed, often truncate at the apex, light brown to dark chestnut 
brown; epispore rather thick, appendages few, straight and tapering, 
expanding at the end into an emarginate aud often distinctly bifurcated 
tip; pedicel about the length of the spore, seldom longer, slightly 
roughened, tapering to the slender and usually curved point, about 5ju 
thick at junction with base of the spore. It is possible that the uredo¬ 
spores described in the foregoing may belong to something else, as I 
only found two spores aud they were mixed in with teleutospores. On 
Heeler a, (?) Ceylon. 
