KERN: GYMNOSPORANGIUM AND ROESTELIA 461 
This species is characterized by the very regular, nearly globose, 
hard, woody gall which it produces. The mycelium is perennial 
for a few years or until the gall is usually several centimeters in 
diameter. The galls remain hanging on the trees for years. They 
are harder and more nearly globose than the galls produced by 
the eastern G. globosum. 
Gymnosporangium inconspicuum sp. nov. 
Telia usually arising between the scale-like leaves on the green 
branches, or rarely on the woody branches, scattered or usually 
aggregated and confluent, oblong, pulvinate, about 0.4—1 mm. wide 
by 0.5-1.5 mm. long by 0.5—-1 mm. high, reddish-brown ; telio- 
spores oblong-ellipsoid, 25-29 by 55-80y, roundish or often 
acutish at apex, obtuse below, wall thin, about 1 », golden-yellow, 
smooth, pedicel hyaline, carotiform, swelling greatly next to the 
spore, 25-65 w, very long, pores one in each cell, apical in the 
upper, near the pedicel in the lower cell. 
On small branches of Sabina utahensis (Engelm.) Rydb. (Ju- 
niperus californica utahensis Engelm.), Glenwood Springs, Col- 
orado, May 1, 1907, Arthur & Kern. Type in herbarium of J. C. 
Arthur ; known only from the type locality. 
As the name implies, this is a very inconspicuous species, and 
this fact undoubtedly accounts for its being overlooked up to the 
Present time. The small, pulvinate sori breaking forth between 
the leaves soon become gelatinized and form a film over the sur- 
face of the leaves. In this condition it appears as if the spore- 
masses of some larger gall-form had dropped upon the leaves and 
clung there. In fact it was only after a great abundance had been 
seen that it was examined closely enough to be recognized as a 
genuine species. The teliospores are the largest of any of our 
known species. In general form they resemble G. c/avipes, but 
are larger and the pedicel is swollen much more. Fruits of Ame- 
lanchier of the previous season, badly infested with a roestelia, 
were found still hanging to the trees in close proximity to the 
cedars abundantly bearing G. inconspicuum and it is strongly sus- 
pected that these forms may be different stages of the same spe- 
Cies, : 
Roestelia Betheli sp. nov. 
Pycnia fruiticolous and epiphyllous, numerous, gregarious, 
More or less crowded in irregular groups on discolored spots, 
