Part 4, 1920] AECIDIACEAE 335 
carla megacarpum Torr., Montana. 
gated oo A. Gray, Idaho, Oregon, Utah, Washington, Wyoming; Alberta, 
Thalictrum purpurascens L,. (T. polygamum Muhl., T. Cornuti 'T. & G.), Colorado, Connecti- 
cut, Iowa, Nebraska, New York, North Dakota, South Dakota, Vermont, Wisconsin: 
Newfoundland, Saskatchewan. , : 
Thalictrum sparsiflorum Turcz., Colorado, Wyoming. 
Thalictrum thyrsoideum Greene, North Dakota. 
Phalictrum venulosum Trel., Colorado, Montana; Alberta. 
Viorna Fremontii (S. Wats.) A. Heller (Clematis Fremontii S. Wats.), Kansas. 
Viorna hirsutissima (Pursh) A. Heller (Clematis hirsutissima Pursh, C. Douglasit Hook.) 
. Colorado, Idaho, Montana, Washington, Wyoming. : 
Viorna Jonesit (Kuntze) Rydb. (Clematis Jonesii Kuntze), Colorado, Utah. 
Viorna reticulata (Walt.) Small (Clematis reticulata Walt.), Texas. 
Viorna Scottii (Porter) Rydb. (Clematis Scottii Porter), Colorado. 
Viorna Viorna (I,.) Small (Clematis Viorna L,.), lowa. 
II. Uredinia amphigenous, numerous, scattered or crowded, oval, 0.3-1 mm. long, soon 
naked, pulverulent, light yellowish- or cinnamon-brown, ruptured epidermis noticeable; 
paraphyses usually rare or none, clavate or capitate, 14-23 by 40-564, the wall colorless, 
1-2 w thick, smooth; urediniospores globoid, obovoid or ellipsoid, 16-24 by 19-32 u; wall pale 
golden-yellow or pale cinnamon-brown, moderately thin, 1.5—2 yu, finely and moderately echin- 
ulate, the pores 6-8, scattered, usually distinct. 
III. Telia chiefly hypophyllous and culmicolous, scattered or often crowded and confluent, 
oblong or linear, 0.3-2 mm. in length, compact, blackish, long covered by the epidermis, 
surrounded by a thin layer of dark-brown stromal hyphae; teliospores clavate, oblong or cylin- 
dric, 13-24 by 32-65 u, usually truncate above, narrowed below, very slightly or not constricted 
at septum; wall dark chestnut-brown above, paler below, thin, about 1 4, moderately thickened 
at apex, 3~—7 », smooth; pedicel tinted, darkest at the attachment, short. 
This species as here represented is composed of a large number of races of considerable fixity 
as shown by numerous cultures. The species can be roughly separated into two groups, each with 
its numerous races, one with smaller spores which appear to be often associated with aecia on Actaea, 
Aconitum, Aquilegia and Thalictrum, the other with larger spores often associated with aecia on 
Clematis and Ranunculus. ‘The species morphologically is essentially like Nigredo Alopecuri (Seym.) 
Arth., except in the septation of the teliospores, and the two forms should eventually be united 
under one name. 
On POACEAE: 
Aegilops ovata L. (Triticum ovatum Rasp.), Oregon. 
-Agropyron caninum (I,.) Beauv., Montana; Alberta. 
Agropyron dasystachyum (Hook.) Scribn.; Oregon, Saskatchewan. 
Agropyron lanceolatum Scribn. & Smith, Colorado, Oregon. 
Agropyron molle (Scribn. & Smith) Rydb., Colorado. 
Agropyron pseudorepens Scribn. & Smith, Colorado, Idaho, Nebraska. 
Agropyron repens (I,.) Beauv., Delaware, Idaho, Indiana, Maine, Massachusetts, Michigan, 
New Jersey, New York, Ohio, Utah, Washington, Wisconsin; Alberta, Nova Scotia. 
Ontario. 
Agropyron Smithit Rydb. (A. occidentale Scribn.), Colorado, Iowa, Kansas, Minnesota, 
Montana, Nebraska, New Mexico, North Dakota, Oklahoma, South Dakota, Utah. 
Agropyron Smithii Palmeri (Scribn. & Smith) A. Heller (A. Palmeri Rydb.), Arizona. 
Agropyron spicatum (Pursh) Scribn. & Smith (A. divergens Nees), Colorado, Montana, Ore- 
gon, Utah, Wyoming; Alberta. 
Agropyron tenerum Vasey, Colorado, Iowa, Montana, Nebraska, New Mexico, North 
Dakota, South Dakota, Utah, Wisconsin, Wyoming; Manitoba, 
Agropyron violaceum (Hornem.) Lange (A. biflorum Am. Auct.), Colorado; Alberta. 
Alopecurus pratensis y., Nova Scotia. 
Avena barbata Brot., California. 
Bromus carinatus Hookerianus (Thurb.) Shear (B. Hookerianus Thurb.), California, Ne- 
braska, Oregon, Washington; British Columbia. 
Bromus ciliatus 1,., Colorado, Minnesota, New Hampshire, Wisconsin; Alberta, Manitoba, 
Nova Scotia, Ontario. 
Bromus cilietus laevighumis Scribn., Wisconsin; Ontario. 
Bromus commutatus Schrad. (B. pratensis Lam. not Ehrh.), Oregon. 
Bromus exaltatus Bernh., Mexico (state). 
Bromus eximius (Shear) Piper (B. vulgaris eximius Shear), California, Montana, Oregon. 
Bromus grandis (Shear) Hitche., Oregon. . 
Bromus hordeaceus 1. (B. mollis I.), California,"Oregon. 
Bromus japonicus ‘Thunb., Indiana. : 
Bromus latiglumis (Shear) Hitchc., Manitoba. 
Bromus madritensis L., (cult.) Mississippi. . . 
Bromus marginatus Nees (B. breviaristatus Buckl.), California, Colorado, Oregon, Utah, 
Wyoming. Sa . 
Bromus pendulinus Sessé (B. laciniatus Beal), Mexico (state). 
Bromus polyanthus Scribn., Washington. 
