460 KERN: GYMNOSPORANGIUM AND ROESTELIA 
On branches of Sabina scopulorum (Sarg.) Rydb. (Juniperus 
scopulorum Sarg.), Boulder, Colorado, April 27, 1907, Bethel & 
Kern (type); Horsetooth Gulch, Fort Collins, Colorado, .June 30, 
1893, C.F. Baker 124 ; Walcott, Colorado, July, 1905, £. Bethel, 
May 2, 1907, F. D. Kern; Laramie Hills, Wyoming, September 
13, 1899, A. & E. Nelson 6907. Type in the herbarium of J. C. 
Arthur. 
This is without doubt the most injurious to the cedars of all 
the species. It produces gall-like knots on both small and large 
branches. The mycelium is perennial, but does not produce new 
hypertrophy within the scars of the old, but always extends to the 
unaffected tissues beyond or at the side. This gives the character- 
istic appearance of new galls beside the old galls. The tendency 
is for the succession of galls to break forth along the grain of the 
wood, thus forming an elongated area of hypertrophy. In the 
selection of a name the author takes the opportunity to show his 
appreciation of the courtesies shown by Professor Bethel in sending 
specimens and otherwise assisting in the study of this group, and 
especially of this species. Professor Bethel has made numerous 
collections of this species and has suggested a probable roestelia 
connection as a result of his excellent field observations. 
Gymnosporangium durum sp. nov. 
Telia appearing on firm, regular, globoid galls 0.5—5 cm. in 
diameter, unevenly disposed, sometimes aggregated, often sepa- 
rated by the scars of the sori of previous seasons, irregularly flat- 
tened, about 1-1.5 mm. broad by 1-5 mm. long at base by 3.5 mm. 
high, often confluent, light chestnut-brown, torn epidermal tissues 
not conspicuous ; teliospores narrowly ellipsoid, 18-22 by 50-65 #, 
narrowed at both ends, slightly constricted at the septum, wall 
pale cinnamon-brown, I-1.5 4 thick, smooth, pedicel hyaline, 
cylindrical, uniform, 4-6 in diameter, very long, pores 2 in each 
cell, near the septum. ; 
On branches of Sabina utahensis (Engelm.) Rydb. (Juniperus 
californica utahensis Engelm.), Glenwood Springs, Colorado, May 
1, 1907, #. D. Kern (type), July, 1905, £. Bethel; Durango, 
Colorado, July 20, 1898 or ’99, Baker, Earle & Tr racy, May 24, 
1907, H. N. Wheeler, communicated by E. Bethel; Mancos, 
Colorado, July 18, 1898, Baker, Earle & Tracy. Type in the 
herbarium of J. C. Arthur. 
