Part 5, 1920] AECIDIACEAE 397 
the outer; aeciospores angularly globoid or broadly ellipsoid, 15-21 by 19-29 y; wall very pale- 
yellow or colorless, 2~2.5 » thick, finely and closely verrucose. 
II. Uredinia hypophyllous, petiolicolous, not especially numerous, scattered, sometimes 
confluent on petioles into small elongate groups, round or elongate, rather small, 0.2-0.5 mm. 
in diameter, early naked, pulverulent, golden-brown, ruptured epidermis evident; uredinio- 
spores globoid or obovoid, 16-24 by 21-30 »; wall yellow or cinnamon-brown, 1.5-3 » thick, 
finely echinulate, appearing almost smooth in lower portion, coarsely echinulate in upper 
portion; pores rather indistinct, probably 3, slightly superequatorial. 
III. Telia amphigenous, numerous, scattered or confluent in groups up to 1.5 mm. in 
diameter, round or irregularly shaped, 0.2-0.8 mm. across, early naked, pulverulent, dark- 
brown, ruptured epidermis not noticeable; teliospores ellipsoid, 18-26 by 26-37 nu, rounded 
above and below, only slightly constricted at septum; wall chestnut-brown, 2-3 » thick, not 
thickened at apex, reticulated with meshes 1.5-2 4 in diameter,ssometimes appearing finely 
verrucose; pedicel hyaline, fragile. 
On AMMIACEAE: 
Chaerophyllum procumbens (1,.) Crantz, District of Columbia, Kentucky, Missouri, Ohio, 
Pennsylvania. 
Glycosma occidentalis Nutt. (Washingtonia occidentalis Coult. & Rose, Osmorrhiza occi- 
dentalis Torr.), California, Colorado, Montana, Oregon, Utah. 
Osmorrhiza brevipes (Coult. & Rose) Suksd. (Washingtonia brevipes Coult. & Rose), Cali- 
fornia, Oregon, Washington. 
Osmorrhiza Claytoni (Michx.) Clarke, (O. brevistylis DC. Myrrhis Claytoni Michx., Washing- 
tonia Claytoni Britton), Connecticut, Delaware, Iowa, Michigan, Missouri, New York, 
Ohio, Pennsylvania, West Virginia, Wisconsin; Ontario, Quebec. 
Osmorrhiza divaricata Nutt. (Washingtonia divaricata Britton), Michigan, Montana, Ore- 
gon, Washington. 
Osmorrhiza intermedia (Rydb.) Blankinship, Washington. 
Osmorrhiza Leibergii (Coult. & Rose) Blankinship, Oregon. 
Osmorrhize longistylis (Torr.) DC. (Washingtonia longistylis Britton), Connecticut, Iowa, 
Kentucky, Maryland, Michigan, Missouri, Nebraska, New York, Ohio, Virginia, 
West Virginia, Wisconsin; Ontario. — 
Osmorrhiza nuda Torr. (Washingtonia nuda A. Heller), California, Montana, Utah, Washing- 
ton. 
Osmorrhiza obtusa (Coult. & Rose) Fernald (Washingtonia obtusa Coult. & Rose), Utah. 
Osmorrhiza sp., South Dakota. 
Type LocaLity: Europe, on Pimpinella Saxifraga. 
Disrrisution: From Connecticut southward to Maryland and west to the Pacific coast; also 
in Europe, Asia Minor, India, and Algeria. 
ILLUSTRATIONS: Beitr. Krypt. Schweiz 22: f. 97; Holway, N. Am. Ured. 1: pl. 38, f. 1254, b, ¢; 
Krypt.-fl. Brand. Pilze 3: f. B39. 
Exsiccatr: Barth. Fungi Columb. 3174, 3361, 3950, 3951, 3952, 4136, 4971; Barth. N. Am. 
Ured. 51, 160, 357, 559, 650, 755, 756, 1360, 1769, 1770, 1959; Ellis & Ev. Fungi Columb. 341, 1770, 
1772; Ellis, N. Am. Fungi 1040a, c, 1460; Garrett, Fungi Utah. 21, 32, 33, 188, 235; Kellerm. Ohio 
Fungi 110, 111, 112, 113, 114; Sydow, Ured. 1347, 1778, 1932, 2472, 2530; Thiim. Myc. Univ. 1327. 
188. Dicaeoma Pseudocymopteri (Holway) Arthur. 
Puccinia Pseudocymopteri Holway, N. Am. Ured. 1:91. 1913. 
O. Pycnia amphigenous or caulicolous, rather few, scattered among the aecia, small, 
punctiform, honey-yellow, turning brown, globoid, 80-112 by 80-128 u; ostiolar filaments not 
seen. 
I, Aecia amphigenous or caulicolous, scattered or clustered in small groups, at first hemi- 
spheric, opening by a pore, finally forming shallow cups up to 0.5 mm. across; peridium pale- 
yellow or colorless, the margin recurved, finally broken irregularly and lacerate; peridial cells 
oblong, 24-32 by 29-45 yu, the walls of even thickness, 5-7 p, the inner wall finely verrucose; 
aeciospores broadly ellipsoid or obovoid, 16-21 by 21-29 4; wall pale-yeLow, rather uniform 
in thickness, about 1.5 u, finely and closely verrucose. 
Il. Uredinia amphigenous or caulicolous, numerous, scattered, confluent on stems, round 
or irregular, up to 0.7 mm. across, covered at first, later naked, pulverulent, cinnamon-brown, 
ruptured epidermis noticeable; urediniospores broadly ellipsoid or globoid, 16-26 by 23-32 pn; 
wall pale- or cinnamon-brown, 1.5-2 u thick, finely echinulate, the pores rather indistinct, 
appearing equatorial. 
Ill. Telia amphigenous or caulicolous, numerous, scattered, confluent on stems, irregu- 
larly round, rather indefinite, up to 0.4 mm. in diameter, tardily naked, pulverulent, dark- 
brown, ruptured epidermis not noticeable; teliospores broadly ellipsoid, 19-23 by 27-35 y, 
