462 KERN: GYMNOSPORANGIUM AND ROESTELIA 
punctiform, subepidermal, honey-yellow becoming blackish, flask- 
shaped, 130-160 » in diameter by 100-112 » high ; ostiolar fila- 
‘ments 45-65 » long. 
_ Aecia fruticolous and hypophyllous, densely aggregated or in 
small groups on discolored spots, cylindrical, o.2-0.3 mm. in di- 
ameter, 3-8 mm. high; peridium dingy-white, becoming finely 
lacerate above, often nearly to. base, spreading, cells linear-rhom- 
boidal in longitudinal section, 16-20 by 60-90 p, overlapping and 
imbricated, outer wall thin, 1-1.5 4, inner wall moderately thick, 
4-6 pv, coarsely rugose with closely set linear ridges directed out- 
ward and downward, hygroscopic ; aeciospores globoid, 18-24 by 
23-30 #, wall chestnut-brown, 2.5-3 » thick, finely verrucose, 
pores several, scattered. 
On fruit and leaves of Crataegus Cerronis A. Nels., Boulder, 
Colorado, September 1905, Z. Bethel (type), August 17, 1906, £ 
Bartholomew. 
On leaves of Crataegus saligna Greene, Wolcott, Colorado, 
September, 1898, C. LZ. Shear 947 (in Griffiths’ West Am. Fungi, 
NO. 333). 
This is a very vigorous species developing an unusually long 
peridium. It is interesting on account of its supposed relation to 
Gymnosporangium Betheli, described above. The same specific 
name is applied to both forms with the hope that cultures will 
soon establish their identity. 
Roestelia Harknessiana Ellis & Ev. sp. nov. 
_ Pycnia unknown. Aecia fruiticolous, evenly disposed, cylin- 
drical, 0.5—0.8 mm. in diameter, 4-7 mm. long ; peridium golden- 
brown, tough, not becoming lacerate, cells rhomboidal in longi- 
tudinal section, 58-74 by 90-112 #4, somewhat overlapping, outer 
wall moderately thick, 4-6 p, smooth, inner wall thick, 15-20 45 
rather coarsely and evenly verrucose with roundish or slightly ir- 
regular papillae ; aeciospores globoid, 22-26 by 26-30, wall 
light cinnamon-brown, 22.5 ft thick, finely verrucose, pores seV- 
eral, scattered. 
On Amelanchier alnifolia Nutt., Klamath River, California, 
July, 1887, collector unknown, communicated by H. W. Harkness 
(in Ellis & Ev. N. Am. Fungi, xo, 2714). Type in the Ellis col- 
lection at the New York Botanical Garden. : 
The collection here listed was issued by Ellis & Everhart in 
their North American F ungi (xo, 2714), in May, 1892, without 
