Part 8, 1922] AECIDIACEAE 577 
Micropuccinia Solidaginis Arth. & Jackson; Arth. Bull. Torrey Club 48: 41. 1921. 
Micropuccinia Lygodesmiae Arth. & Jackson; Arth. Bull. Torrey Club 48: 42. 1921. 
Micropuccinia tuberculans Arth. & Jackson; Arth. Bull. Torrey Club 48: 42. 1921. 
Micropuccinia variolans Arth. & Jackson; Arth. Bull. Torrey Club 48: 42. 1921. 
Micropuccinia Xylorrhizae Arth. & Jackson; Arth. Bull. Torrey Club 48: 42. 1921. 
Leptopuccinia Actinellae Sydow, Ann. Myc. 20: 120. 1922. 
Leptopuccinia Grindeliae Sydow, Ann. Myc. 20: 120. 1922. 
Leptopuccinia Lygodesmiae Sydow, Ann. Myc. 20: 120. 1922. 
Leptopuccinia tuberculans Sydow, Ann. Myc. 20: 121. 1922. 
Leptopuccinia veriolans Sydow, Ann. Myc. 20: 121. 1922. 
O. Pycnia rare, on certain hosts only, amphigenous, crowded in small groups or scattered 
among the telia, punctiform, yellowish, inconspicuous, globoid, 100-150 u in diameter; ostiolar 
filaments 50-80 » long, becoming agglutinate. 
III. Telia amphigenous or caulicolous, solitary or more commonly gregarious and often 
more or less confluent in orbicular groups 0.2-1 cm. across, on discolored spots, variable in 
size, 0.2-1 mm. in diameter, round or elliptic, usually early naked, compact, at first punctate, 
often becoming pulvinate, dark chocolate-brown or blackish, ruptured epidermis usually 
conspicuous; teliospores ellipsoid, oblong, or obovate, occasionally irregular, 18-28 by 35-64 u, 
rounded, obtuse or acute above, rounded or occasionally narrowed to pedicel below, usually 
noticeably constricted at septum; wall dark cinnamon- or chestnut-brown, 1.5-3 » thick, 
usually greatly thickened above, concolorous or sometimes paler, 4-15 wu, smooth; pedicel 
colorless or golden-brown, firm, ouce to thrice length of spore; mesospores and spores with 
three or more cells occasionally intermixed. 
On some hosts, especially when accompanied by pycnia, with a-few detached peridial 
cells and aeciospores within the telia, best seen in young sori; peridial cells colorless, globoid, 
24-36 by 26-48 yu, closely and coarsely tuberculate; aeciospores globoid, 16-26 by 20-32 n; 
wall golden-brown, 1.5—3 » thick, finely verrucose. 
This species is correlated with Dicaeoma Stipae (Arth.) Kuntze, the telial characters 
of the two species being essentially the same and the hosts of the short-cycled species cor- 
responding to the aecial hosts of the heteroecious species. This agreement doubtless indicates 
a common origin for the two species. 
On CARDUACEAE: . 
Chrysoma laricifolia (A. Gray) Greene (A plopappus laricifolius A. Gray), Arizona. 
Chrysopsis Bakeri Greene, Colorado, Utah. 
Chrysopsis Berlandieri Greene (C. villosa canescens A. Gray), Oklahoma. 
Chrysopsis fastigiata Greene, California. 
Chrysopsis imbricata A. Nelson, Colorado. 
Chrysopsis resinolens A. Nelson, Colorado, Wyoming. 
Chrysopsis villosa (Pursh) Nutt., Colorado. 
Chrysopsis sp., Arizona. 
Chrysothamnus Bigelovii (A. Gray) Greene (Bigelovia Bigelovii A. Gray), Colorado. 
Chrysothamnus Bloomeri (A. Gray) Greene (A plopappus Bloomeri A. Gray), California. 
Chrysothamnus elegans Greene, Colorado. 
Chrysothamnus frigidus Greene, Wyoming. 
Chrysothamnus glaucus A. Nelson, Wyoming. 
Chrysothamnus graveolens (Nutt.) Greene (Bigelovia graveolens A. Gray), Colorado. 
Chrysothamnus lanceolatus Nutt. (Bigelovia Douglasii lanceolata A. Gray), Colorado. 
Chrysothamnus linifolius Greene, Utah. 
Chrysothamnus marianus Rydb., Utah. 
Chrysothamnus nauseosus (Pursh) Britton (Bigelovia graveolens albicaulis A. Gray), Montana, 
Nevada. 
Chrysothamnus plattensis Greene, Colorado, Montana. 
Chrysothamnus puberulus (D. C. Eaton) Greene (Bigelovia Douglasii puberula A. Gray), 
Utah. 
Chrysothamnus pulcherrimus A. Nelson, Utah. 
Chrysothamnus pumilus Nutt. (Bigelovia Douglasii pumila A. Gray), Colorado, Utah. 
Chrysothamnus viscidiflorus (Hook.) Nutt. (Bigelovia Douglasii A. Gray), Utah. 
Erigeron arenarioides A. Gray (Aster arenarioides A. Gray), Utah. 
Erigeron caespitosus Nutt., Wyoming. 
Erigeron Eatonii A. Gray, Wyoming.. 
Erigeron filiformis (Hook.) Nutt., Nevada. . 
Erigeron macranthus Nutt., Colorado, Utah, Wyoming. 
Erigeron microlonchus Greene, Wyoming. 
Erigeron salsuginosus (Richards.) A. Gray, Utah. : 
Eucephalus glaucus Nutt. (Aster glaucus T. & G.), Colorado, Wyoming. 
Grindelia aphanactis Rydb., Colorado, New Mexico. . ; 
Grindelia cuneifolia Nutt. (G. robusta angustifolia A. Gray), California. 
Grindelia erecta A. Nelson, Colorado. 
Grindelia fastigiata Greene, Colorado. 
Grindelia inornata Greene, Colorado. 
